static BufferedImage pixelateImage(int tempWidth, BufferedImage img) {
  int w = img.getWidth(), h = img.getHeight();
  int tempHeight = widthToHeight(tempWidth, img);
  var img2 = scaledBufferedImageFromIntegralImage(tempWidth, IntegralImage(img));
  ret scaleBufferedImagePixelated(img2, w, h);
}