This is a color's perceived brightness by the human eye - Java 2D Graphics

Java examples for 2D Graphics:Color

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Description

This is a color's perceived brightness by the human eye

Demo Code

/*/*  w ww .ja v a2  s  . c  o m*/

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

public class Main {
    private static final float[] PERCEIVED_BRIGHTNESS = { 0.299f, 0.587f,
            0.114f };

    /**
     * This is a color's perceived brightness by the human eye
     * @param c
     * @return brightness from 0.0 to 1.0
     */
    public static float perceivedBrightness(Color c) {
        return (c == null) ? 1.0f
                : (PERCEIVED_BRIGHTNESS[0] * c.getRed()
                        + PERCEIVED_BRIGHTNESS[1] * c.getGreen() + PERCEIVED_BRIGHTNESS[2]
                        * c.getBlue()) / 255f;
    }
}

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