!7

static double[][] ii;

p {
  ii = integralImage(toBW(new RGBImage(10, 10, Color.gray)));
  printStruct(ii);
  checkRect(rect(1, 1, 2, 2));
  checkRect(rect(1, 2, 2, 2));
  checkRect(rect(2, 2, 2, 2));
  checkRect(rect(2, 3, 3, 3));
}

svoid checkRect(Rect r) {
  print("Expected: " + rectVolume(r)*0.5 + ", sum: " + iiSumRect(ii, r));
}