!7

static RGB destColor = rgb("#5650C3");
static float contrast = 5f;
static float gamma = 0.5f;

p {
  RGBImage img = shootScreen();
  int w = img.getWidth(), h = img.getHeight();
  BWImage bw = new BWImage(w, h);
  int destColorInt = destColor.getInt();
  for y to h: for x to w: {
    float diff = rgbDiff(img.getInt(x, y), destColorInt);
    //diff = pow(diff, gamma);
    //diff *= contrast;
    diff = (diff-0.2)*10;
    bw.setPixel(x, y, diff);
  }
  showBWImage(bw);
}