svoid test_ImageSimilarityAtScale() {
  var img = randomImage(50, 20);
  var ii = IntegralImage(img);
  ImageSimilarityAtScale algo = new(ii, ii, 4);
  algo.run();
  while (algo.step()) {
    print("Value: " + algo! + " after " + nBlocks(algo.blocksCalculated()));
  }
}