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)));

}