static URecognizer.Cell uRoot(IIntegralImage img) {
  ret new URecognizer(img).rootCell();
}

static URecognizer.Cell uRoot(BufferedImage img) {
  ret uRoot(IntegralImage(img));
}

static URecognizer.Cell uRoot(MakesBufferedImage img) {
  ret uRoot(IntegralImage(img));
}