static IBinaryImage scaledIBinaryImage(WidthAndHeight size, IBinaryImage img) {
  ret scaledIBinaryImage(size.w(), size.h(), img);
}

static IBinaryImage scaledIBinaryImage(int w, int h default widthToHeight(w, img), IBinaryImage img) {
  if (img == null) null;
  int w1 = img.getWidth(), h1 = img.getHeight();
  if (w == w1 && h == h1) ret img;
  double factorX = doubleRatio(w1, w);
  double factorY = doubleRatio(h1, h);
  ret iBinaryImageFromFunction(w, h,
    (x, y) -> img.getBoolPixel(ifloor(x*factorX), ifloor(y*factorY)));
}