Gets the intensity of a given rgb 0xFF is to get the last bit blue value - Java 2D Graphics

Java examples for 2D Graphics:Color RGB

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Description

Gets the intensity of a given rgb 0xFF is to get the last bit blue value

Demo Code


//package com.java2s;

public class Main {
    /**//from   www  .j a v a2 s . c o m
     * Gets the intensity of a given rgb
     * 0xFF is to get the last bit blue value 
     * @param rgb
     * @return intensity in [0, 255]
     */
    public static int getColorIntensity(int rgb) {
        int r = (rgb >> 16) & 0xFF;
        int g = (rgb >> 8) & 0xFF;
        int b = rgb & 0xFF;
        return (r * 7471 + g * 38470 + b * 19595) >> 16;
    }
}

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