Java BufferedImage to Gray Scale grayImage(BufferedImage image)

Description

gray Image

License

Apache License

Declaration

public static BufferedImage grayImage(BufferedImage image) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;

public class Main {

    public static BufferedImage grayImage(String filename) {
        return grayImage(new File(filename));
    }//from  w w  w.  j  av  a2 s .  c om

    public static BufferedImage grayImage(File file) {
        try {
            BufferedImage image = ImageIO.read(file);
            return grayImage(image);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static BufferedImage grayImage(BufferedImage image) {
        int width = image.getWidth();
        int height = image.getHeight();

        BufferedImage grayImage = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY);
        for (int i = 0; i < width; i++) {
            for (int j = 0; j < height; j++) {
                int rgb = image.getRGB(i, j);
                grayImage.setRGB(i, j, rgb + 100);
            }
        }
        return grayImage;
    }
}

Related

1. imageToGrayscale(BufferedImage image)
2. imageToGrayscale(BufferedImage img)
3. gray(BufferedImage src)
4. byteBufferToGrayBufferedImage(ByteBuffer buffer, BufferedImage bi)