author | lana |
Thu, 26 Dec 2013 12:04:16 -0800 | |
changeset 23010 | 6dadb192ad81 |
parent 21957 | 97758de70fbd |
child 25770 | d132697706ea |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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********************************************************************** |
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********************************************************************** |
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********************************************************************** |
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*** COPYRIGHT (c) Eastman Kodak Company, 1997 *** |
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*** As an unpublished work pursuant to Title 17 of the United *** |
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*** States Code. All rights reserved. *** |
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********************************************************************** |
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********************************************************************** |
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**********************************************************************/ |
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package java.awt.color; |
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import sun.java2d.cmm.ColorTransform; |
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import sun.java2d.cmm.CMSManager; |
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import sun.java2d.cmm.PCMM; |
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/** |
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* |
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* The ICC_ColorSpace class is an implementation of the abstract |
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* ColorSpace class. This representation of |
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* device independent and device dependent color spaces is based on the |
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* International Color Consortium Specification ICC.1:2001-12, File Format for |
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* Color Profiles (see <A href="http://www.color.org">http://www.color.org</A>). |
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* <p> |
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* Typically, a Color or ColorModel would be associated with an ICC |
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* Profile which is either an input, display, or output profile (see |
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* the ICC specification). There are other types of ICC Profiles, e.g. |
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* abstract profiles, device link profiles, and named color profiles, |
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* which do not contain information appropriate for representing the color |
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* space of a color, image, or device (see ICC_Profile). |
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* Attempting to create an ICC_ColorSpace object from an inappropriate ICC |
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* Profile is an error. |
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* <p> |
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* ICC Profiles represent transformations from the color space of |
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* the profile (e.g. a monitor) to a Profile Connection Space (PCS). |
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* Profiles of interest for tagging images or colors have a |
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* PCS which is one of the device independent |
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* spaces (one CIEXYZ space and two CIELab spaces) defined in the |
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* ICC Profile Format Specification. Most profiles of interest |
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* either have invertible transformations or explicitly specify |
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* transformations going both directions. Should an ICC_ColorSpace |
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* object be used in a way requiring a conversion from PCS to |
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* the profile's native space and there is inadequate data to |
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* correctly perform the conversion, the ICC_ColorSpace object will |
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* produce output in the specified type of color space (e.g. TYPE_RGB, |
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* TYPE_CMYK, etc.), but the specific color values of the output data |
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* will be undefined. |
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* <p> |
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* The details of this class are not important for simple applets, |
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* which draw in a default color space or manipulate and display |
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* imported images with a known color space. At most, such applets |
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* would need to get one of the default color spaces via |
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* ColorSpace.getInstance(). |
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* @see ColorSpace |
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* @see ICC_Profile |
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*/ |
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public class ICC_ColorSpace extends ColorSpace { |
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static final long serialVersionUID = 3455889114070431483L; |
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private ICC_Profile thisProfile; |
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private float[] minVal; |
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private float[] maxVal; |
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private float[] diffMinMax; |
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private float[] invDiffMinMax; |
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private boolean needScaleInit = true; |
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// {to,from}{RGB,CIEXYZ} methods create and cache these when needed |
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private transient ColorTransform this2srgb; |
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private transient ColorTransform srgb2this; |
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private transient ColorTransform this2xyz; |
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private transient ColorTransform xyz2this; |
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/** |
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* Constructs a new ICC_ColorSpace from an ICC_Profile object. |
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* @param profile the specified ICC_Profile object |
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* @exception IllegalArgumentException if profile is inappropriate for |
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* representing a ColorSpace. |
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*/ |
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public ICC_ColorSpace (ICC_Profile profile) { |
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super (profile.getColorSpaceType(), profile.getNumComponents()); |
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int profileClass = profile.getProfileClass(); |
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/* REMIND - is NAMEDCOLOR OK? */ |
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if ((profileClass != ICC_Profile.CLASS_INPUT) && |
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(profileClass != ICC_Profile.CLASS_DISPLAY) && |
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(profileClass != ICC_Profile.CLASS_OUTPUT) && |
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(profileClass != ICC_Profile.CLASS_COLORSPACECONVERSION) && |
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(profileClass != ICC_Profile.CLASS_NAMEDCOLOR) && |
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(profileClass != ICC_Profile.CLASS_ABSTRACT)) { |
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throw new IllegalArgumentException("Invalid profile type"); |
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} |
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thisProfile = profile; |
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setMinMax(); |
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} |
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/** |
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* Returns the ICC_Profile for this ICC_ColorSpace. |
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* @return the ICC_Profile for this ICC_ColorSpace. |
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*/ |
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public ICC_Profile getProfile() { |
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return thisProfile; |
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} |
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/** |
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* Transforms a color value assumed to be in this ColorSpace |
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* into a value in the default CS_sRGB color space. |
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* <p> |
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* This method transforms color values using algorithms designed |
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143 |
* to produce the best perceptual match between input and output |
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144 |
* colors. In order to do colorimetric conversion of color values, |
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|
145 |
* you should use the <code>toCIEXYZ</code> |
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146 |
* method of this color space to first convert from the input |
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147 |
* color space to the CS_CIEXYZ color space, and then use the |
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148 |
* <code>fromCIEXYZ</code> method of the CS_sRGB color space to |
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149 |
* convert from CS_CIEXYZ to the output color space. |
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150 |
* See {@link #toCIEXYZ(float[]) toCIEXYZ} and |
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151 |
* {@link #fromCIEXYZ(float[]) fromCIEXYZ} for further information. |
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152 |
* <p> |
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153 |
* @param colorvalue a float array with length of at least the number |
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154 |
* of components in this ColorSpace. |
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|
155 |
* @return a float array of length 3. |
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156 |
* @throws ArrayIndexOutOfBoundsException if array length is not |
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157 |
* at least the number of components in this ColorSpace. |
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158 |
*/ |
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159 |
public float[] toRGB (float[] colorvalue) { |
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160 |
|
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161 |
if (this2srgb == null) { |
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162 |
ColorTransform[] transformList = new ColorTransform [2]; |
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163 |
ICC_ColorSpace srgbCS = |
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(ICC_ColorSpace) ColorSpace.getInstance (CS_sRGB); |
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165 |
PCMM mdl = CMSManager.getModule(); |
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166 |
transformList[0] = mdl.createTransform( |
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167 |
thisProfile, ColorTransform.Any, ColorTransform.In); |
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168 |
transformList[1] = mdl.createTransform( |
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169 |
srgbCS.getProfile(), ColorTransform.Any, ColorTransform.Out); |
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this2srgb = mdl.createTransform(transformList); |
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171 |
if (needScaleInit) { |
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|
172 |
setComponentScaling(); |
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173 |
} |
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174 |
} |
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|
175 |
|
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176 |
int nc = this.getNumComponents(); |
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177 |
short tmp[] = new short[nc]; |
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178 |
for (int i = 0; i < nc; i++) { |
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tmp[i] = (short) |
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180 |
((colorvalue[i] - minVal[i]) * invDiffMinMax[i] + 0.5f); |
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|
181 |
} |
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|
182 |
tmp = this2srgb.colorConvert(tmp, null); |
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|
183 |
float[] result = new float [3]; |
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|
184 |
for (int i = 0; i < 3; i++) { |
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|
185 |
result[i] = ((float) (tmp[i] & 0xffff)) / 65535.0f; |
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186 |
} |
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187 |
return result; |
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|
188 |
} |
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|
189 |
|
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190 |
/** |
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|
191 |
* Transforms a color value assumed to be in the default CS_sRGB |
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|
192 |
* color space into this ColorSpace. |
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diff
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|
193 |
* <p> |
7952521a4ad3
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|
194 |
* This method transforms color values using algorithms designed |
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parents:
diff
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|
195 |
* to produce the best perceptual match between input and output |
7952521a4ad3
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prr
parents:
diff
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|
196 |
* colors. In order to do colorimetric conversion of color values, |
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diff
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|
197 |
* you should use the <code>toCIEXYZ</code> |
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|
198 |
* method of the CS_sRGB color space to first convert from the input |
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parents:
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|
199 |
* color space to the CS_CIEXYZ color space, and then use the |
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parents:
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|
200 |
* <code>fromCIEXYZ</code> method of this color space to |
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parents:
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|
201 |
* convert from CS_CIEXYZ to the output color space. |
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|
202 |
* See {@link #toCIEXYZ(float[]) toCIEXYZ} and |
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|
203 |
* {@link #fromCIEXYZ(float[]) fromCIEXYZ} for further information. |
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|
204 |
* <p> |
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|
205 |
* @param rgbvalue a float array with length of at least 3. |
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|
206 |
* @return a float array with length equal to the number of |
7952521a4ad3
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parents:
diff
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|
207 |
* components in this ColorSpace. |
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diff
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|
208 |
* @throws ArrayIndexOutOfBoundsException if array length is not |
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parents:
diff
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|
209 |
* at least 3. |
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diff
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|
210 |
*/ |
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parents:
diff
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|
211 |
public float[] fromRGB(float[] rgbvalue) { |
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prr
parents:
diff
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|
212 |
|
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prr
parents:
diff
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|
213 |
if (srgb2this == null) { |
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prr
parents:
diff
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|
214 |
ColorTransform[] transformList = new ColorTransform [2]; |
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prr
parents:
diff
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|
215 |
ICC_ColorSpace srgbCS = |
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|
216 |
(ICC_ColorSpace) ColorSpace.getInstance (CS_sRGB); |
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parents:
diff
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|
217 |
PCMM mdl = CMSManager.getModule(); |
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prr
parents:
diff
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|
218 |
transformList[0] = mdl.createTransform( |
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|
219 |
srgbCS.getProfile(), ColorTransform.Any, ColorTransform.In); |
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|
220 |
transformList[1] = mdl.createTransform( |
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parents:
diff
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|
221 |
thisProfile, ColorTransform.Any, ColorTransform.Out); |
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prr
parents:
diff
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|
222 |
srgb2this = mdl.createTransform(transformList); |
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prr
parents:
diff
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|
223 |
if (needScaleInit) { |
7952521a4ad3
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prr
parents:
diff
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|
224 |
setComponentScaling(); |
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prr
parents:
diff
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|
225 |
} |
7952521a4ad3
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parents:
diff
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|
226 |
} |
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parents:
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|
227 |
|
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prr
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|
228 |
short tmp[] = new short[3]; |
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prr
parents:
diff
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|
229 |
for (int i = 0; i < 3; i++) { |
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|
230 |
tmp[i] = (short) ((rgbvalue[i] * 65535.0f) + 0.5f); |
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prr
parents:
diff
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|
231 |
} |
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parents:
diff
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|
232 |
tmp = srgb2this.colorConvert(tmp, null); |
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prr
parents:
diff
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|
233 |
int nc = this.getNumComponents(); |
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prr
parents:
diff
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|
234 |
float[] result = new float [nc]; |
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prr
parents:
diff
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|
235 |
for (int i = 0; i < nc; i++) { |
7952521a4ad3
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|
236 |
result[i] = (((float) (tmp[i] & 0xffff)) / 65535.0f) * |
7952521a4ad3
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prr
parents:
diff
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|
237 |
diffMinMax[i] + minVal[i]; |
7952521a4ad3
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prr
parents:
diff
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|
238 |
} |
7952521a4ad3
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parents:
diff
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|
239 |
return result; |
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prr
parents:
diff
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|
240 |
} |
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parents:
diff
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|
241 |
|
7952521a4ad3
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parents:
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|
242 |
|
7952521a4ad3
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prr
parents:
diff
changeset
|
243 |
/** |
7952521a4ad3
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prr
parents:
diff
changeset
|
244 |
* Transforms a color value assumed to be in this ColorSpace |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
245 |
* into the CS_CIEXYZ conversion color space. |
7952521a4ad3
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prr
parents:
diff
changeset
|
246 |
* <p> |
7952521a4ad3
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prr
parents:
diff
changeset
|
247 |
* This method transforms color values using relative colorimetry, |
7952521a4ad3
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prr
parents:
diff
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|
248 |
* as defined by the ICC Specification. This |
7952521a4ad3
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prr
parents:
diff
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|
249 |
* means that the XYZ values returned by this method are represented |
7952521a4ad3
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prr
parents:
diff
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|
250 |
* relative to the D50 white point of the CS_CIEXYZ color space. |
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parents:
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|
251 |
* This representation is useful in a two-step color conversion |
7952521a4ad3
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prr
parents:
diff
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|
252 |
* process in which colors are transformed from an input color |
7952521a4ad3
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prr
parents:
diff
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|
253 |
* space to CS_CIEXYZ and then to an output color space. This |
7952521a4ad3
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prr
parents:
diff
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|
254 |
* representation is not the same as the XYZ values that would |
7952521a4ad3
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prr
parents:
diff
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|
255 |
* be measured from the given color value by a colorimeter. |
7952521a4ad3
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prr
parents:
diff
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|
256 |
* A further transformation is necessary to compute the XYZ values |
7952521a4ad3
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parents:
diff
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|
257 |
* that would be measured using current CIE recommended practices. |
7952521a4ad3
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parents:
diff
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|
258 |
* The paragraphs below explain this in more detail. |
7952521a4ad3
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prr
parents:
diff
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|
259 |
* <p> |
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parents:
diff
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|
260 |
* The ICC standard uses a device independent color space (DICS) as the |
7952521a4ad3
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prr
parents:
diff
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|
261 |
* mechanism for converting color from one device to another device. In |
7952521a4ad3
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prr
parents:
diff
changeset
|
262 |
* this architecture, colors are converted from the source device's color |
7952521a4ad3
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prr
parents:
diff
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|
263 |
* space to the ICC DICS and then from the ICC DICS to the destination |
7952521a4ad3
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prr
parents:
diff
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|
264 |
* device's color space. The ICC standard defines device profiles which |
7952521a4ad3
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prr
parents:
diff
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|
265 |
* contain transforms which will convert between a device's color space |
7952521a4ad3
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parents:
diff
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|
266 |
* and the ICC DICS. The overall conversion of colors from a source |
7952521a4ad3
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parents:
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|
267 |
* device to colors of a destination device is done by connecting the |
7952521a4ad3
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prr
parents:
diff
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|
268 |
* device-to-DICS transform of the profile for the source device to the |
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prr
parents:
diff
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|
269 |
* DICS-to-device transform of the profile for the destination device. |
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prr
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diff
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|
270 |
* For this reason, the ICC DICS is commonly referred to as the profile |
7952521a4ad3
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prr
parents:
diff
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|
271 |
* connection space (PCS). The color space used in the methods |
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prr
parents:
diff
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|
272 |
* toCIEXYZ and fromCIEXYZ is the CIEXYZ PCS defined by the ICC |
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|
273 |
* Specification. This is also the color space represented by |
7952521a4ad3
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prr
parents:
diff
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|
274 |
* ColorSpace.CS_CIEXYZ. |
7952521a4ad3
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prr
parents:
diff
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|
275 |
* <p> |
7952521a4ad3
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prr
parents:
diff
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|
276 |
* The XYZ values of a color are often represented as relative to some |
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|
277 |
* white point, so the actual meaning of the XYZ values cannot be known |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
278 |
* without knowing the white point of those values. This is known as |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
279 |
* relative colorimetry. The PCS uses a white point of D50, so the XYZ |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
280 |
* values of the PCS are relative to D50. For example, white in the PCS |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
281 |
* will have the XYZ values of D50, which is defined to be X=.9642, |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
282 |
* Y=1.000, and Z=0.8249. This white point is commonly used for graphic |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
283 |
* arts applications, but others are often used in other applications. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
284 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
285 |
* To quantify the color characteristics of a device such as a printer |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
286 |
* or monitor, measurements of XYZ values for particular device colors |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
287 |
* are typically made. For purposes of this discussion, the term |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
288 |
* device XYZ values is used to mean the XYZ values that would be |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
289 |
* measured from device colors using current CIE recommended practices. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
290 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
291 |
* Converting between device XYZ values and the PCS XYZ values returned |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
292 |
* by this method corresponds to converting between the device's color |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
293 |
* space, as represented by CIE colorimetric values, and the PCS. There |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
294 |
* are many factors involved in this process, some of which are quite |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
295 |
* subtle. The most important, however, is the adjustment made to account |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
296 |
* for differences between the device's white point and the white point of |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
297 |
* the PCS. There are many techniques for doing this and it is the |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
298 |
* subject of much current research and controversy. Some commonly used |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
299 |
* methods are XYZ scaling, the von Kries transform, and the Bradford |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
300 |
* transform. The proper method to use depends upon each particular |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
301 |
* application. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
302 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
303 |
* The simplest method is XYZ scaling. In this method each device XYZ |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
304 |
* value is converted to a PCS XYZ value by multiplying it by the ratio |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
305 |
* of the PCS white point (D50) to the device white point. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
306 |
* <pre> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
307 |
* |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
308 |
* Xd, Yd, Zd are the device XYZ values |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
309 |
* Xdw, Ydw, Zdw are the device XYZ white point values |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
310 |
* Xp, Yp, Zp are the PCS XYZ values |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
311 |
* Xd50, Yd50, Zd50 are the PCS XYZ white point values |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
312 |
* |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
313 |
* Xp = Xd * (Xd50 / Xdw) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
314 |
* Yp = Yd * (Yd50 / Ydw) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
315 |
* Zp = Zd * (Zd50 / Zdw) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
316 |
* |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
317 |
* </pre> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
318 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
319 |
* Conversion from the PCS to the device would be done by inverting these |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
320 |
* equations: |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
321 |
* <pre> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
322 |
* |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
323 |
* Xd = Xp * (Xdw / Xd50) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
324 |
* Yd = Yp * (Ydw / Yd50) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
325 |
* Zd = Zp * (Zdw / Zd50) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
326 |
* |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
327 |
* </pre> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
328 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
329 |
* Note that the media white point tag in an ICC profile is not the same |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
330 |
* as the device white point. The media white point tag is expressed in |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
331 |
* PCS values and is used to represent the difference between the XYZ of |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
332 |
* device illuminant and the XYZ of the device media when measured under |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
333 |
* that illuminant. The device white point is expressed as the device |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
334 |
* XYZ values corresponding to white displayed on the device. For |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
335 |
* example, displaying the RGB color (1.0, 1.0, 1.0) on an sRGB device |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
336 |
* will result in a measured device XYZ value of D65. This will not |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
337 |
* be the same as the media white point tag XYZ value in the ICC |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
338 |
* profile for an sRGB device. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
339 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
340 |
* @param colorvalue a float array with length of at least the number |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
341 |
* of components in this ColorSpace. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
342 |
* @return a float array of length 3. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
343 |
* @throws ArrayIndexOutOfBoundsException if array length is not |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
344 |
* at least the number of components in this ColorSpace. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
345 |
*/ |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
346 |
public float[] toCIEXYZ(float[] colorvalue) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
347 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
348 |
if (this2xyz == null) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
349 |
ColorTransform[] transformList = new ColorTransform [2]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
350 |
ICC_ColorSpace xyzCS = |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
351 |
(ICC_ColorSpace) ColorSpace.getInstance (CS_CIEXYZ); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
352 |
PCMM mdl = CMSManager.getModule(); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
353 |
try { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
354 |
transformList[0] = mdl.createTransform( |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
355 |
thisProfile, ICC_Profile.icRelativeColorimetric, |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
356 |
ColorTransform.In); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
357 |
} catch (CMMException e) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
358 |
transformList[0] = mdl.createTransform( |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
359 |
thisProfile, ColorTransform.Any, ColorTransform.In); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
360 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
361 |
transformList[1] = mdl.createTransform( |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
362 |
xyzCS.getProfile(), ColorTransform.Any, ColorTransform.Out); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
363 |
this2xyz = mdl.createTransform (transformList); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
364 |
if (needScaleInit) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
365 |
setComponentScaling(); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
366 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
367 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
368 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
369 |
int nc = this.getNumComponents(); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
370 |
short tmp[] = new short[nc]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
371 |
for (int i = 0; i < nc; i++) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
372 |
tmp[i] = (short) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
373 |
((colorvalue[i] - minVal[i]) * invDiffMinMax[i] + 0.5f); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
374 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
375 |
tmp = this2xyz.colorConvert(tmp, null); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
376 |
float ALMOST_TWO = 1.0f + (32767.0f / 32768.0f); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
377 |
// For CIEXYZ, min = 0.0, max = ALMOST_TWO for all components |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
378 |
float[] result = new float [3]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
379 |
for (int i = 0; i < 3; i++) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
380 |
result[i] = (((float) (tmp[i] & 0xffff)) / 65535.0f) * ALMOST_TWO; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
381 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
382 |
return result; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
383 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
384 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
385 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
386 |
/** |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
387 |
* Transforms a color value assumed to be in the CS_CIEXYZ conversion |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
388 |
* color space into this ColorSpace. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
389 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
390 |
* This method transforms color values using relative colorimetry, |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
391 |
* as defined by the ICC Specification. This |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
392 |
* means that the XYZ argument values taken by this method are represented |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
393 |
* relative to the D50 white point of the CS_CIEXYZ color space. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
394 |
* This representation is useful in a two-step color conversion |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
395 |
* process in which colors are transformed from an input color |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
396 |
* space to CS_CIEXYZ and then to an output color space. The color |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
397 |
* values returned by this method are not those that would produce |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
398 |
* the XYZ value passed to the method when measured by a colorimeter. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
399 |
* If you have XYZ values corresponding to measurements made using |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
400 |
* current CIE recommended practices, they must be converted to D50 |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
401 |
* relative values before being passed to this method. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
402 |
* The paragraphs below explain this in more detail. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
403 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
404 |
* The ICC standard uses a device independent color space (DICS) as the |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
405 |
* mechanism for converting color from one device to another device. In |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
406 |
* this architecture, colors are converted from the source device's color |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
407 |
* space to the ICC DICS and then from the ICC DICS to the destination |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
408 |
* device's color space. The ICC standard defines device profiles which |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
409 |
* contain transforms which will convert between a device's color space |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
410 |
* and the ICC DICS. The overall conversion of colors from a source |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
411 |
* device to colors of a destination device is done by connecting the |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
412 |
* device-to-DICS transform of the profile for the source device to the |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
413 |
* DICS-to-device transform of the profile for the destination device. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
414 |
* For this reason, the ICC DICS is commonly referred to as the profile |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
415 |
* connection space (PCS). The color space used in the methods |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
416 |
* toCIEXYZ and fromCIEXYZ is the CIEXYZ PCS defined by the ICC |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
417 |
* Specification. This is also the color space represented by |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
418 |
* ColorSpace.CS_CIEXYZ. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
419 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
420 |
* The XYZ values of a color are often represented as relative to some |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
421 |
* white point, so the actual meaning of the XYZ values cannot be known |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
422 |
* without knowing the white point of those values. This is known as |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
423 |
* relative colorimetry. The PCS uses a white point of D50, so the XYZ |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
424 |
* values of the PCS are relative to D50. For example, white in the PCS |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
425 |
* will have the XYZ values of D50, which is defined to be X=.9642, |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
426 |
* Y=1.000, and Z=0.8249. This white point is commonly used for graphic |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
427 |
* arts applications, but others are often used in other applications. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
428 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
429 |
* To quantify the color characteristics of a device such as a printer |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
430 |
* or monitor, measurements of XYZ values for particular device colors |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
431 |
* are typically made. For purposes of this discussion, the term |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
432 |
* device XYZ values is used to mean the XYZ values that would be |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
433 |
* measured from device colors using current CIE recommended practices. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
434 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
435 |
* Converting between device XYZ values and the PCS XYZ values taken as |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
436 |
* arguments by this method corresponds to converting between the device's |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
437 |
* color space, as represented by CIE colorimetric values, and the PCS. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
438 |
* There are many factors involved in this process, some of which are quite |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
439 |
* subtle. The most important, however, is the adjustment made to account |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
440 |
* for differences between the device's white point and the white point of |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
441 |
* the PCS. There are many techniques for doing this and it is the |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
442 |
* subject of much current research and controversy. Some commonly used |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
443 |
* methods are XYZ scaling, the von Kries transform, and the Bradford |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
444 |
* transform. The proper method to use depends upon each particular |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
445 |
* application. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
446 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
447 |
* The simplest method is XYZ scaling. In this method each device XYZ |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
448 |
* value is converted to a PCS XYZ value by multiplying it by the ratio |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
449 |
* of the PCS white point (D50) to the device white point. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
450 |
* <pre> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
451 |
* |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
452 |
* Xd, Yd, Zd are the device XYZ values |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
453 |
* Xdw, Ydw, Zdw are the device XYZ white point values |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
454 |
* Xp, Yp, Zp are the PCS XYZ values |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
455 |
* Xd50, Yd50, Zd50 are the PCS XYZ white point values |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
456 |
* |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
457 |
* Xp = Xd * (Xd50 / Xdw) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
458 |
* Yp = Yd * (Yd50 / Ydw) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
459 |
* Zp = Zd * (Zd50 / Zdw) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
460 |
* |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
461 |
* </pre> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
462 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
463 |
* Conversion from the PCS to the device would be done by inverting these |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
464 |
* equations: |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
465 |
* <pre> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
466 |
* |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
467 |
* Xd = Xp * (Xdw / Xd50) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
468 |
* Yd = Yp * (Ydw / Yd50) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
469 |
* Zd = Zp * (Zdw / Zd50) |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
470 |
* |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
471 |
* </pre> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
472 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
473 |
* Note that the media white point tag in an ICC profile is not the same |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
474 |
* as the device white point. The media white point tag is expressed in |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
475 |
* PCS values and is used to represent the difference between the XYZ of |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
476 |
* device illuminant and the XYZ of the device media when measured under |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
477 |
* that illuminant. The device white point is expressed as the device |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
478 |
* XYZ values corresponding to white displayed on the device. For |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
479 |
* example, displaying the RGB color (1.0, 1.0, 1.0) on an sRGB device |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
480 |
* will result in a measured device XYZ value of D65. This will not |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
481 |
* be the same as the media white point tag XYZ value in the ICC |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
482 |
* profile for an sRGB device. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
483 |
* <p> |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
484 |
* @param colorvalue a float array with length of at least 3. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
485 |
* @return a float array with length equal to the number of |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
486 |
* components in this ColorSpace. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
487 |
* @throws ArrayIndexOutOfBoundsException if array length is not |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
488 |
* at least 3. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
489 |
*/ |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
490 |
public float[] fromCIEXYZ(float[] colorvalue) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
491 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
492 |
if (xyz2this == null) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
493 |
ColorTransform[] transformList = new ColorTransform [2]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
494 |
ICC_ColorSpace xyzCS = |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
495 |
(ICC_ColorSpace) ColorSpace.getInstance (CS_CIEXYZ); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
496 |
PCMM mdl = CMSManager.getModule(); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
497 |
transformList[0] = mdl.createTransform ( |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
498 |
xyzCS.getProfile(), ColorTransform.Any, ColorTransform.In); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
499 |
try { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
500 |
transformList[1] = mdl.createTransform( |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
501 |
thisProfile, ICC_Profile.icRelativeColorimetric, |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
502 |
ColorTransform.Out); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
503 |
} catch (CMMException e) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
504 |
transformList[1] = CMSManager.getModule().createTransform( |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
505 |
thisProfile, ColorTransform.Any, ColorTransform.Out); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
506 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
507 |
xyz2this = mdl.createTransform(transformList); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
508 |
if (needScaleInit) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
509 |
setComponentScaling(); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
510 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
511 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
512 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
513 |
short tmp[] = new short[3]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
514 |
float ALMOST_TWO = 1.0f + (32767.0f / 32768.0f); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
515 |
float factor = 65535.0f / ALMOST_TWO; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
516 |
// For CIEXYZ, min = 0.0, max = ALMOST_TWO for all components |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
517 |
for (int i = 0; i < 3; i++) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
518 |
tmp[i] = (short) ((colorvalue[i] * factor) + 0.5f); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
519 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
520 |
tmp = xyz2this.colorConvert(tmp, null); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
521 |
int nc = this.getNumComponents(); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
522 |
float[] result = new float [nc]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
523 |
for (int i = 0; i < nc; i++) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
524 |
result[i] = (((float) (tmp[i] & 0xffff)) / 65535.0f) * |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
525 |
diffMinMax[i] + minVal[i]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
526 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
527 |
return result; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
528 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
529 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
530 |
/** |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
531 |
* Returns the minimum normalized color component value for the |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
532 |
* specified component. For TYPE_XYZ spaces, this method returns |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
533 |
* minimum values of 0.0 for all components. For TYPE_Lab spaces, |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
534 |
* this method returns 0.0 for L and -128.0 for a and b components. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
535 |
* This is consistent with the encoding of the XYZ and Lab Profile |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
536 |
* Connection Spaces in the ICC specification. For all other types, this |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
537 |
* method returns 0.0 for all components. When using an ICC_ColorSpace |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
538 |
* with a profile that requires different minimum component values, |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
539 |
* it is necessary to subclass this class and override this method. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
540 |
* @param component The component index. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
541 |
* @return The minimum normalized component value. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
542 |
* @throws IllegalArgumentException if component is less than 0 or |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
543 |
* greater than numComponents - 1. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
544 |
* @since 1.4 |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
545 |
*/ |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
546 |
public float getMinValue(int component) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
547 |
if ((component < 0) || (component > this.getNumComponents() - 1)) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
548 |
throw new IllegalArgumentException( |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
549 |
"Component index out of range: + component"); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
550 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
551 |
return minVal[component]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
552 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
553 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
554 |
/** |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
555 |
* Returns the maximum normalized color component value for the |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
556 |
* specified component. For TYPE_XYZ spaces, this method returns |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
557 |
* maximum values of 1.0 + (32767.0 / 32768.0) for all components. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
558 |
* For TYPE_Lab spaces, |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
559 |
* this method returns 100.0 for L and 127.0 for a and b components. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
560 |
* This is consistent with the encoding of the XYZ and Lab Profile |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
561 |
* Connection Spaces in the ICC specification. For all other types, this |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
562 |
* method returns 1.0 for all components. When using an ICC_ColorSpace |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
563 |
* with a profile that requires different maximum component values, |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
564 |
* it is necessary to subclass this class and override this method. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
565 |
* @param component The component index. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
566 |
* @return The maximum normalized component value. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
567 |
* @throws IllegalArgumentException if component is less than 0 or |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
568 |
* greater than numComponents - 1. |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
569 |
* @since 1.4 |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
570 |
*/ |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
571 |
public float getMaxValue(int component) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
572 |
if ((component < 0) || (component > this.getNumComponents() - 1)) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
573 |
throw new IllegalArgumentException( |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
574 |
"Component index out of range: + component"); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
575 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
576 |
return maxVal[component]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
577 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
578 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
579 |
private void setMinMax() { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
580 |
int nc = this.getNumComponents(); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
581 |
int type = this.getType(); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
582 |
minVal = new float[nc]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
583 |
maxVal = new float[nc]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
584 |
if (type == ColorSpace.TYPE_Lab) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
585 |
minVal[0] = 0.0f; // L |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
586 |
maxVal[0] = 100.0f; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
587 |
minVal[1] = -128.0f; // a |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
588 |
maxVal[1] = 127.0f; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
589 |
minVal[2] = -128.0f; // b |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
590 |
maxVal[2] = 127.0f; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
591 |
} else if (type == ColorSpace.TYPE_XYZ) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
592 |
minVal[0] = minVal[1] = minVal[2] = 0.0f; // X, Y, Z |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
593 |
maxVal[0] = maxVal[1] = maxVal[2] = 1.0f + (32767.0f/ 32768.0f); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
594 |
} else { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
595 |
for (int i = 0; i < nc; i++) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
596 |
minVal[i] = 0.0f; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
597 |
maxVal[i] = 1.0f; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
598 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
599 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
600 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
601 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
602 |
private void setComponentScaling() { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
603 |
int nc = this.getNumComponents(); |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
604 |
diffMinMax = new float[nc]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
605 |
invDiffMinMax = new float[nc]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
606 |
for (int i = 0; i < nc; i++) { |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
607 |
minVal[i] = this.getMinValue(i); // in case getMinVal is overridden |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
608 |
maxVal[i] = this.getMaxValue(i); // in case getMaxVal is overridden |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
609 |
diffMinMax[i] = maxVal[i] - minVal[i]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
610 |
invDiffMinMax[i] = 65535.0f / diffMinMax[i]; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
611 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
612 |
needScaleInit = false; |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
613 |
} |
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
614 |
|
7952521a4ad3
6662775: Move imaging and color classes from closed to open
prr
parents:
diff
changeset
|
615 |
} |