Helps in finding the difference between two images by obtaining their samples and comparing them. The number of bands assosiated with each image is also compared, along with their width and height.
File file1 = new File("C:\Documents and Settings\515956\Desktop\Raj_image.jpg");
File file2 = new File("C:\Documents and Settings\515956\Desktop\Local_image.jpg");
BufferedImage image1 = ImageIO.read(file1);
BufferedImage image2 = ImageIO.read(file2);
Raster r1 = image1.getData();
Raster r2 = image2.getData();
boolean ret; // Stores result.
// Check image sizes and number of bands. If there are different
// then no need to compare images as they are definitely not equal.
System.out.println("image1 band"+r1.getNumBands()+" image2 band"+r2.getNumBands()+" image1 width"+r1.getWidth()+" image2 width"+ r2.getWidth()+" image1 height"+ r1.getHeight()+" image2 height"+r2.getHeight());
if (r1.getNumBands() != r2.getNumBands() || r1.getWidth() != r2.getWidth() || r1.getHeight() != r2.getHeight()) {
ret = false;
System.out.println("Primary comparison failure");
}
else {
// #Bands and image bounds match so compare each sample in turn.
ret = true;
search:
for (int i=0; i<r1.getNumBands(); ++i) {
for (int x=0; x<r1.getWidth(); ++x) {
for (int y=0; y<r1.getHeight(); ++y) {
if (r1.getSample(x, y, i) != r2.getSample(x, y, i)) {
// At least one sample differs so result is false;
ret = false;
System.out.println("sample difference");
// Use labeled break to terminate all loops.
break
search;
}
}
}
}
}
System.out.println(ret);