Here you can find the source of changeRGBSaturation(final BufferedImage image, final double s)
| Parameter | Description |
|---|---|
| image | image expected to contain a 4 band rgba color model. |
| s | The factor with which the saturation value should be multiplied. |
public static void changeRGBSaturation(final BufferedImage image, final double s)
//package com.java2s; /**// ww w . j av a2 s .c o m * This class provides a set of methods aroung image and graphics manipulation. Most of those manipulation are mere * gimmicks, but sometimes vanity is virtue. * <p/> * <hr/> Copyright 2006-2012 Torsten Heup * <p/> * 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 * <p/> * http://www.apache.org/licenses/LICENSE-2.0 * <p/> * 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. */ import java.awt.image.*; public class Main { /** * Changes the color saturation of the given RGB image. * * @param image image expected to contain a 4 band rgba color model. * @param s The factor with which the saturation value should be multiplied. */ public static void changeRGBSaturation(final BufferedImage image, final double s) { double RW = 0.3086; double RG = 0.6084; double RB = 0.0820; final double a = (1 - s) * RW + s; final double b = (1 - s) * RW; final double c = (1 - s) * RW; final double d = (1 - s) * RG; final double e = (1 - s) * RG + s; final double f = (1 - s) * RG; final double g = (1 - s) * RB; final double h = (1 - s) * RB; final double i = (1 - s) * RB + s; final int width = image.getWidth(); final int height = image.getHeight(); final double[] red = new double[width * height]; final double[] green = new double[width * height]; final double[] blue = new double[width * height]; final WritableRaster raster = image.getRaster(); raster.getSamples(0, 0, width, height, 0, red); raster.getSamples(0, 0, width, height, 1, green); raster.getSamples(0, 0, width, height, 2, blue); for (int x = 0; x < red.length; x++) { final double r0 = red[x]; final double g0 = green[x]; final double b0 = blue[x]; red[x] = a * r0 + d * g0 + g * b0; green[x] = b * r0 + e * g0 + h * b0; blue[x] = c * r0 + f * g0 + i * b0; } raster.setSamples(0, 0, width, height, 0, red); raster.setSamples(0, 0, width, height, 1, green); raster.setSamples(0, 0, width, height, 2, blue); } }