Java-OpenCV Sobel

/** * Get the Sobel Mat of input image! * @param image The input image. * @return The Sobel Mat image of input image. */ public Mat getSobelMat(Mat image) { if (image.empty()) { System.out.println("Please check the input image!"); return image; } Mat gray = image.clone(); if (3 == gray.channels()) { Imgproc.cvtColor(gray, gray, Imgproc.COLOR_BGR2GRAY); } Mat grad = new Mat(); Mat grad_x = new Mat(); Mat grad_y = new Mat(); Mat abs_grad_x = new Mat(); Mat abs_grad_y = new Mat(); final int scharr_scale = 1; final int scharr_delta = 0; final int scharr_ddpeth = CvType.CV_16S; //Imgproc.Scharr(grayImg, grad_x, scharr_ddpeth, 1, 0, scharr_scale, scharr_delta, Core.BORDER_DEFAULT); //Imgproc.Scharr(grayImg, grad_y, scharr_ddpeth, 0, 1, scharr_scale, scharr_delta, Core.BORDER_DEFAULT); Imgproc.Sobel(gray, grad_x, scharr_ddpeth, 1, 0, 3, scharr_scale, scharr_delta, Core.BORDER_DEFAULT); Imgproc.Sobel(gray, grad_y, scharr_ddpeth, 0, 1, 3,scharr_scale, scharr_delta, Core.BORDER_DEFAULT); Core.convertScaleAbs(grad_x, abs_grad_x); Core.convertScaleAbs(grad_y, abs_grad_y); Core.addWeighted(abs_grad_x, 0.5, abs_grad_y, 0.5, 0, grad); return grad; }