import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class ImageCompMain {
public static void main(String[] args) throws IOException {
String baseFile = "D:/imageA.PNG";
String changeFile = "D:/imageB.PNG";
//Call method to compare above images.
compareWithBaseImage(new File(baseFile), new File(changeFile), "Comp_Result_Sol03");
}
public static void createPngImage(BufferedImage image, String fileName) throws IOException {
ImageIO.write(image, "png", new File(fileName));
}
public static void createJpgImage(BufferedImage image, String fileName) throws IOException {
ImageIO.write(image, "jpg", new File(fileName));
}
public static void compareWithBaseImage(File baseImage, File compareImage, String resultOfComparison)
throws IOException {
BufferedImage bImage = ImageIO.read(baseImage);
BufferedImage cImage = ImageIO.read(compareImage);
int height = bImage.getHeight();
int width = bImage.getWidth();
BufferedImage rImage = new BufferedImage(width, height, BufferedImage.TYPE_4BYTE_ABGR);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
try {
int pixelC = cImage.getRGB(x, y);
int pixelB = bImage.getRGB(x, y);
if (pixelB == pixelC ) {
rImage.setRGB(x, y, bImage.getRGB(x, y));
} else {
int a= 0xff | bImage.getRGB(x, y)>>24 ,
r= 0xff & bImage.getRGB(x, y)>>16 ,
g= 0x00 & bImage.getRGB(x, y)>>8,
b= 0x00 & bImage.getRGB(x, y);
int modifiedRGB=a<<24|r<<16|g<<8|b;
rImage.setRGB(x,y,modifiedRGB);
}
} catch (Exception e) {
// handled hieght or width mismatch
rImage.setRGB(x, y, 0x80ff0000);
}
}
}
String filePath = baseImage.toPath().toString();
String fileExtenstion = filePath.substring(filePath.lastIndexOf('.'), filePath.length());
if (fileExtenstion.toUpperCase().contains("PNG")) {
createPngImage(rImage, resultOfComparison + fileExtenstion);
} else {
createJpgImage(rImage, resultOfComparison + fileExtenstion);
}
}
}
