Java BufferedImage Operation changeContrast(BufferedImage img, float amount)

Description

Changes the contrast of an image

License

Open Source License

Parameter

Parameter	Description
img	a parameter
amount	a parameter

Declaration

public static BufferedImage changeContrast(BufferedImage img, float amount) 

Method Source Code

//package com.java2s;
/* Image to ZX Spec//from  w w w .  j  a va2  s.  c o  m
 * Copyright (C) 2014 Silent Software (Benjamin Brown)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

import java.awt.image.BufferedImage;
import java.awt.image.RescaleOp;

public class Main {
    /**
     * Changes the contrast of an image
     * 
     * @param img
     * @param amount
     * @return
     */
    public static BufferedImage changeContrast(BufferedImage img, float amount) {
        if (amount == 1) {
            return img;
        }
        RescaleOp rescaleOp = new RescaleOp(amount, 0, null);
        return rescaleOp.filter(img, null);
    }
}

Related

1. buildColorStatisticsOfImage(BufferedImage image)
2. buildingCoordinatesInImage(BufferedImage imageSection)
3. buildPixelAverages(BufferedImage a, Rectangle[] sectors)
4. buildSectors(BufferedImage a, int sqrtSectors)
5. cascadeHorizontal(final BufferedImage... images)
6. changeImageToArray(BufferedImage bufferedImage)
7. checkIfManyColors(BufferedImage image)
8. checkImageMatch(BufferedImage img1, String imgName1, BufferedImage img2, String imgName2)
9. checkImageType(BufferedImage img, String name)