!7

p-exp {
  BWImage bw = new(200, 100, 0f);
  bwFillWhiteRect(bw, 30, 40, 80, 35);
  final BWIntegralImage ii = new(bw);
  showImage(bw);
  int w = ii.getWidth(), h = ii.getHeight();
  for (int y = 0; y < h; y += 5) {
    for (int x = 0; x < w; x += 5)
      print_noNewLine(bwIntegralImage_whiteRectWithBlackBorder_perPixel(ii, x, y, x+30, y+30, 2, 2) + " ");
    print();
  }
  
  print(highestByFunction(ptGrid(0, 0, w, h, 5, 5), func(Pt p) {
    bwIntegralImage_whiteRectWithBlackBorder(ii, p.x, p.y, p.x+30, p.y+30, 2, 2)
  }));
}