!752

static BWImage img;
static ImageSurface is2;
static float threshold = 0.99f; // for horizontalAutoSplit

p {
  img = loadBWImage("#1005702");
  update();
}

svoid update() {
  RGBImage vis = visualize().toRGB();
  if (is2 == null) {
    is2 = showZoomedImage(vis);
    addToWindowAndPack(is2, liveSliderZeroToOne(threshold/10000f*9999f, voidfunc(float x) {
      threshold = x*10000f/9999f;
      update();
    }));
  } else
    is2.setImage(vis);
}

static BWImage visualize() {
  BWImage im = new BWImage(img);
  for (Rect r : horizontalAutoSplit(img, threshold)) {
    r = autoCropOfBWImage(img, r);
    darkenBWImagePart(im, r);
  }
  ret im;
}

Began life as a copy of #1005706