Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

public class Main {
    /**
     * XYZ to sRGB conversion matrix
     */
    public static double[][] Mi = { { 3.2406, -1.5372, -0.4986 }, { -0.9689, 1.8758, 0.0415 },
            { 0.0557, -0.2040, 1.0570 } };

    /**
     * Convert XYZ to RGB.
     *
     * Convert equation and source code is from ImageJ's plugin Color Space Converter
     * http://rsbweb.nih.gov/ij/plugins/download/Color_Space_Converter.java
     * 
     * @param X
     * @param Y
     * @param Z
     * @return RGB in int array.
     */
    private static int[] XYZtoRGB(double X, double Y, double Z) {
        int[] result = new int[3];

        double x = X / 100.0;
        double y = Y / 100.0;
        double z = Z / 100.0;

        // [r g b] = [X Y Z][Mi]
        double r = (x * Mi[0][0]) + (y * Mi[0][1]) + (z * Mi[0][2]);
        double g = (x * Mi[1][0]) + (y * Mi[1][1]) + (z * Mi[1][2]);
        double b = (x * Mi[2][0]) + (y * Mi[2][1]) + (z * Mi[2][2]);

        // assume sRGB
        if (r > 0.0031308) {
            r = ((1.055 * Math.pow(r, 1.0 / 2.4)) - 0.055);
        } else {
            r = (r * 12.92);
        }

        if (g > 0.0031308) {
            g = ((1.055 * Math.pow(g, 1.0 / 2.4)) - 0.055);
        } else {
            g = (g * 12.92);
        }

        if (b > 0.0031308) {
            b = ((1.055 * Math.pow(b, 1.0 / 2.4)) - 0.055);
        } else {
            b = (b * 12.92);
        }

        r = (r < 0) ? 0 : r;
        g = (g < 0) ? 0 : g;
        b = (b < 0) ? 0 : b;

        // convert 0..1 into 0..255
        result[0] = (int) Math.round(r * 255);
        result[1] = (int) Math.round(g * 255);
        result[2] = (int) Math.round(b * 255);

        return result;
    }

    /**
     * Convert XYZ to RGB
     * @param XYZ in a double array.
     * @return RGB in int array.
     */
    private static int[] XYZtoRGB(double[] XYZ) {
        return XYZtoRGB(XYZ[0], XYZ[1], XYZ[2]);
    }
}