Examples of java.awt.color.ColorSpace.toCIEXYZ()

java.awt.color.ColorSpace.toCIEXYZ()
Transforms a color value assumed to be in this ColorSpace into the CS_CIEXYZ conversion color space.
This method transforms color values using relative colorimetry, as defined by the International Color Consortium standard. This means that the XYZ values returned by this method are represented relative to the D50 white point of the CS_CIEXYZ color space. This representation is useful in a two-step color conversion process in which colors are transformed from an input color space to CS_CIEXYZ and then to an output color space. This representation is not the same as the XYZ values that would be measured from the given color value by a colorimeter. A further transformation is necessary to compute the XYZ values that would be measured using current CIE recommended practices. See the {@link ICC_ColorSpace#toCIEXYZ(float[]) toCIEXYZ} method ofICC_ColorSpace for further information.
@param colorvalue a float array with length of at least the numberof components in this ColorSpace @return a float array of length 3 @throws ArrayIndexOutOfBoundsException if array length is notat least the number of components in this ColorSpace.

            index = 0;
            int   alpha = Integer.MAX_VALUE;
            float delta = Float.POSITIVE_INFINITY;
            final ColorSpace space = colors.getColorSpace();
            final float[] RGB   = new float[3];
            final float[] BLACK = XYZtoLAB(space.toCIEXYZ(RGB)); // Black in Lab color space.
            assert BLACK != RGB;
            for (int i=colors.getMapSize(); --i>=0;) {
                final int a = colors.getAlpha(i);
                if (a <= alpha) {
                    RGB[0] = colors.getRed  (i)/255f;

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                final int a = colors.getAlpha(i);
                if (a <= alpha) {
                    RGB[0] = colors.getRed  (i)/255f;
                    RGB[1] = colors.getGreen(i)/255f;
                    RGB[2] = colors.getBlue (i)/255f;
                    final float d = colorDistance(XYZtoLAB(space.toCIEXYZ(RGB)), BLACK);
                    assert d >= 0 : i; // Check mostly for NaN value
                    if (a<alpha || d<delta) {
                        alpha = a;
                        delta = d;
                        index = i;

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        final float[] RGB = {
            color.getRed()  /255f,
            color.getGreen()/255f,
            color.getBlue() /255f
        };
        final float[] REF = XYZtoLAB(space.toCIEXYZ(RGB));
        float delta = Float.POSITIVE_INFINITY;
        int index = 0;
        assert REF != RGB;
        for (int i=colors.getMapSize(); --i>=0;) {
            if (i != exclude) {

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        for (int i=colors.getMapSize(); --i>=0;) {
            if (i != exclude) {
                RGB[0] = colors.getRed  (i)/255f;
                RGB[1] = colors.getGreen(i)/255f;
                RGB[2] = colors.getBlue (i)/255f;
                final float d = colorDistance(XYZtoLAB(space.toCIEXYZ(RGB)), REF);
                assert d >= 0 : i; // Check mostly for NaN value
                if (d <= delta) {
                    delta = d;
                    index = i;
                }

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