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Percentage difference between images: Difference between revisions
Percentage difference between images (view source)
Revision as of 15:12, 18 January 2013
, 11 years agoadded Java
(+ D entry) |
(added Java) |
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Line 671:
'Lenna50.jpg' (+/@,@:|@:- % 2.55 * */@$@])&read_image 'Lenna100.jpg'
1.62559</lang>
=={{header|Java}}==
<lang java>import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import java.io.IOException;
import java.net.URL;
public class ImgDiffPercent
{
public static void main(String args[])
{
BufferedImage img1 = null;
BufferedImage img2 = null;
try {
URL url1 = new URL("http://rosettacode.org/mw/images/3/3c/Lenna50.jpg");
URL url2 = new URL("http://rosettacode.org/mw/images/b/b6/Lenna100.jpg");
img1 = ImageIO.read(url1);
img2 = ImageIO.read(url2);
} catch (IOException e) {
e.printStackTrace();
}
int width1 = img1.getWidth(null);
int width2 = img2.getWidth(null);
int height1 = img1.getHeight(null);
int height2 = img2.getHeight(null);
if ((width1 != width2) || (height1 != height2)) {
System.err.println("Error: Images dimensions mismatch");
System.exit(1);
}
long diff = 0;
for (int i = 0; i < height1; i++) {
for (int j = 0; j < width1; j++) {
int rgb1 = img1.getRGB(i, j);
int rgb2 = img2.getRGB(i, j);
int r1 = (rgb1 >> 16) & 0xff;
int g1 = (rgb1 >> 8) & 0xff;
int b1 = (rgb1 ) & 0xff;
int r2 = (rgb2 >> 16) & 0xff;
int g2 = (rgb2 >> 8) & 0xff;
int b2 = (rgb2 ) & 0xff;
diff += Math.abs(r1 - r2);
diff += Math.abs(g1 - g2);
diff += Math.abs(b1 - b2);
}
}
double n = width1 * height1 * 3;
double p = diff / n / 255.0;
System.out.println("diff percent: " + (p * 100.0));
}
}</lang>
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end
</lang>
=={{header|Mathematica}}==
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