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  1. import java.awt.*;
  2. import java.awt.image.*;
  3. import java.io.*;
  4. import javax.imageio.*;
  5.  
  6. class Main {
  7.     private void doIt(String fileName) {
  8.         BufferedImage bi = null;
  9.         try {
  10.             bi = ImageIO.read(new File(fileName));
  11.             int width = bi.getWidth();
  12.             int height = bi.getHeight();
  13.             for(int x=0; x<width; x++) {
  14.                 for(int y=0; y<height; y++) {
  15.                     int argb = bi.getRGB(x, y);
  16.                     int a    = (argb >>> 24) & 0xff;
  17.                     int r    = (argb >>> 16) & 0xff;
  18.                     int g    = (argb >>>  8) & 0xff;
  19.                     int b    = argb          & 0xff;
  20.                     if(r == 0xff && g == 0 && b == 0) {
  21.                         System.out.printf("%d, %d%n", x, y);
  22.                     }
  23.                 }
  24.             }
  25.         } catch(IOException ex) {
  26.             ex.printStackTrace();
  27.         }
  28.     }
  29.  
  30.     public static void main(String[] args) {
  31.         new Main().doIt(args[0]);
  32.     }
  33. }
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https://ideone.com/p4lJPL
language:
Java (12.0.1)
created:
11 years ago
visibility:
secret

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