static RasterBars reproduceRasterBars(IBWIntegralImage ii) {
  var thinImage = scaledBWImageFromBWIntegralImage_withMeta(ii, 1, ii.getHeight());
  var streaks = streaksOfRepeatingElements(listFromFunction(thinImage.getHeight(), y -> thinImage.getInt(0, y)));
  ret new RasterBars(ii.getWidth(), ii.getHeight(), streaks);
}