Java BufferedImage to Gray Scale gray(BufferedImage src)

Description

gray

License

Apache License

Declaration

public static final BufferedImage gray(BufferedImage src) 

Method Source Code

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

import java.awt.image.BufferedImage;

import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

public class Main {

    public static final BufferedImage gray(BufferedImage src) {
        int width = src.getWidth();
        int height = src.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 = src.getRGB(i, j);
                grayImage.setRGB(i, j, rgb);
            }/*from  w w  w . j av a2 s  . co m*/
        }
        return grayImage;
    }

    public static final BufferedImage gray(File f) throws IOException {
        BufferedImage src = ImageIO.read(f);
        return binary(src);
    }

    public static final BufferedImage binary(BufferedImage src) {
        int width = src.getWidth();
        int height = src.getHeight();

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

    public static final BufferedImage binary(File f) throws IOException {
        BufferedImage src = ImageIO.read(f);
        return binary(src);
    }
}

Related

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