private static Mat boxfilter(Mat I, int r) {
		Mat result = new Mat();
		Imgproc.blur(I, result, new Size(r, r));
		return result;
	}
Guided Image Filter for Color Image
@param origI guidance image (should be a gray-scale/single channel image)
@param p filtering input image (should be a gray-scale/single channel image)
@param r local window radius
@param eps regularization parameter
@param s blocks number, s * s
@param depth image depth
@return filtered image
src/main/java/com/isaac/utils/Filters.java