Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {
    /**
     * sRGB to XYZ conversion matrix
     */
    public static double[][] M = { { 0.4124, 0.3576, 0.1805 }, { 0.2126, 0.7152, 0.0722 },
            { 0.0193, 0.1192, 0.9505 } };

    /**
     * Convert RGB to XYZ
     * 
     * 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 R
     * @param G
     * @param B
     * @return XYZ in double array.
     */
    public static double[] RGBtoXYZ(int R, int G, int B) {
        double[] result = new double[3];

        // convert 0..255 into 0..1
        double r = R / 255.0;
        double g = G / 255.0;
        double b = B / 255.0;

        // assume sRGB
        if (r <= 0.04045) {
            r = r / 12.92;
        } else {
            r = Math.pow(((r + 0.055) / 1.055), 2.4);
        }

        if (g <= 0.04045) {
            g = g / 12.92;
        } else {
            g = Math.pow(((g + 0.055) / 1.055), 2.4);
        }

        if (b <= 0.04045) {
            b = b / 12.92;
        } else {
            b = Math.pow(((b + 0.055) / 1.055), 2.4);
        }

        r *= 100.0;
        g *= 100.0;
        b *= 100.0;

        // [X Y Z] = [r g b][M]
        result[0] = (r * M[0][0]) + (g * M[0][1]) + (b * M[0][2]);
        result[1] = (r * M[1][0]) + (g * M[1][1]) + (b * M[1][2]);
        result[2] = (r * M[2][0]) + (g * M[2][1]) + (b * M[2][2]);

        return result;
    }

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