Color from RGB - Java 2D Graphics

Java examples for 2D Graphics:Color RGB

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Description

Color from RGB

Demo Code


//package com.java2s;
import java.awt.Color;

public class Main {
    public static float[] fromRGB(Color color) {
        //  Get RGB values in the range 0 - 1

        float[] rgb = color.getRGBColorComponents(null);
        float r = rgb[0];
        float g = rgb[1];
        float b = rgb[2];

        //   Minimum and Maximum RGB values are used in the HSL calculations

        float min = Math.min(r, Math.min(g, b));
        float max = Math.max(r, Math.max(g, b));

        //  Calculate the Hue

        float h = 0;

        if (max == min)
            h = 0;/*from w  w w .j a  va 2  s  .co m*/
        else if (max == r)
            h = ((60 * (g - b) / (max - min)) + 360) % 360;
        else if (max == g)
            h = (60 * (b - r) / (max - min)) + 120;
        else if (max == b)
            h = (60 * (r - g) / (max - min)) + 240;

        //  Calculate the Luminance

        float l = (max + min) / 2;

        //  Calculate the Saturation

        float s = 0;

        if (max == min)
            s = 0;
        else if (l <= .5f)
            s = (max - min) / (max + min);
        else
            s = (max - min) / (2 - max - min);

        return new float[] { h, s * 100, l * 100 };
    }
}

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