code: public static <T extends ImageGray<T>>
  	InputToBinary<T> globalHuang(double minValue, double maxValue, double scale,  boolean down, Class<T> inputType) {
  		return new GlobalBinaryFilter.Huang<>(minValue, maxValue, scale, down, ImageType.single(inputType));
  	}
docs: @see boofcv.alg.filter.binary.GThresholdImageOps#computeHuang(int[], int)
  
  @param minValue The minimum value of a pixel in the image.  (inclusive)
  @param maxValue The maximum value of a pixel in the image.  (inclusive)
  @param down Should it threshold up or down.
  @param inputType Type of input image
  @return Filter to binary