meta-for BWIntegralImage also as IBWIntegralImage {

  static BWImage scaledBWImageFromBWIntegralImage(int w, BWIntegralImage img) {
    ret scaledBWImageFromBWIntegralImage(img, w);
  }
  
  static BWImage scaledBWImageFromBWIntegralImage(BWIntegralImage img, int w, int h default heightForWidth(img, w)) {
    byte[] pixels = scaledGrayBytesFromBWIntegralImage(img, w, h);
    ret new BWImage(w, h, pixels);
  }

}