Computes the luminance value of a color (a value in range 0-255). - Java 2D Graphics

Java examples for 2D Graphics:Color

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Description

Computes the luminance value of a color (a value in range 0-255).

Demo Code

/*//from w  w  w  .  j a  v a2  s  .c  o m
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;
import java.awt.Color;

public class Main {
    /**
     * Computes the luminance value of a color (a value in range 0-255).
     * It is the luminance value equal to the Y component of the YIQ or the YUV
     * color space models.
     */
    public static int luminance(Color color) {
        return luminance(color.getRed(), color.getGreen(), color.getBlue());
    }

    /**
     * Computes the luminance value of a color (a value in range 0-255).
     * It is the luminance value equal to the Y component of the YIQ or the YUV
     * color space models.
     */
    public static int luminance(int red, int green, int blue) {
        return (red * 299 + green * 587 + blue * 114) / 1000;
    }
}

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