sinterface BWIntegralImageMaker1 implements IBWIntegralImageMaker {
  IBWIntegralImage toBWIntegralImage(BufferedImage image) {
    //if (image.getRaster().getSampleModel() instanceof PixelInterleavedSampleModel) // gray image
    if (is8BitGrayscale(image))
      grab(grabbableGrayPixels(image));
    else { // rgb image
      grab(grabbableIntPixels_fastOrSlow(image));
      // broken!? var gray = rgbToGrayUsingImageTypeAndDrawImage(image);
      // grab(grabbableGrayPixels(gray));
    }
  }
}