数字图像处理——用Java对图像做镜像变换

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

public class ImageMirror {
public static void main(String[] args) throws IOException{
File file = null;
BufferedImage image = null;

try {
file = new File("E:\\in.jpg");
image = ImageIO.read(file);

int width = image.getWidth();
int height = image.getHeight();

for (int j = 0; j < height; j++) {
int l = 0, r = width - 1;
while (l < r) {
int pl = image.getRGB(l, j);
int pr = image.getRGB(r, j);

image.setRGB(l, j, pr);
image.setRGB(r, j, pl);

l++;
r--;
}
}

file = new File("E:\\out.jpg");
ImageIO.write(image, "jpg", file);

} catch (IOException e) {
e.printStackTrace();
}
}
}