Quelle XYZTest.java Sprache: JAVA

/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
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*
* This code is distributed in the hope that it will be useful, but WITHOUT
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* version 2 for more details (a copy is included in the LICENSE file that
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import java.awt.color.ColorSpace;
import java.awt.color.ICC_ColorSpace;
import java.awt.color.ICC_Profile;
import java.awt.color.ICC_ProfileRGB;

/**
* @test
* @bug 4267139
* @summary This test verifies that an sRGB color can be accurately converted to
*          an CIE colorimetric XYZ value.
*/
public final class XYZTest {

    public static void main(String[] args) {
        float[] rgb = new float[3];
        rgb[0] = 1.0F;
        rgb[1] = 1.0F;
        rgb[2] = 1.0F;
        ICC_ProfileRGB pf =
            (ICC_ProfileRGB) ICC_Profile.getInstance(ColorSpace.CS_sRGB);
        ICC_ColorSpace srgb = new ICC_ColorSpace(pf);
        float[] xyz = srgb.toCIEXYZ(rgb);
        float mxyz[] = new float[3];
        // adjust D50 relative values by a factor which is the ratio
        // of the device white point (in this case sRGB) divided by
        // the D50 (PCS) white point
        mxyz[0] = xyz[0] * (0.9505f / 0.9642f);
        mxyz[1] = xyz[1] * (1.0000f / 1.0000f);
        mxyz[2] = xyz[2] * (1.0891f / 0.8249f);
        if ((Math.abs(mxyz[0] - 0.9505f) > 0.01f) ||
            (Math.abs(mxyz[1] - 1.0000f) > 0.01f) ||
            (Math.abs(mxyz[2] - 1.0891f) > 0.01f)) {
            throw new Error("sRGB (1.0, 1.0, 1.0) doesn't convert " +
                            "correctly to CIEXYZ");
        }
    }
}

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