<br />
<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_stu57bfj0ev8cdi007453ht2ud, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
<br />
<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
!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));
  haarFeature(rect(1, 1, 2, 2), rect(3, 1, 2, 2));
}

svoid checkRect(Rect r) {
  print("Expected: " + rectVolume(r)*0.5 + ", sum: " + iiSumRect(ii, r));
}

svoid haarFeature(Rect black, Rect white) {
  if (rectVolume(black) != rectVolume(white))
    fail("Unequal volumes: " + rectWithVolume(black) + "/" + rectWithVolume(white));
  double value = iiSumRect(ii, white)-iiSumRect(ii, black);
  print("Haar " + black + " with " + white + " => " + value);
}