Circle Detection Android Opencv Procedure using JavaCvCamera

public void SaveImage(Mat mat) {

        Imgproc.cvtColor(mat, processingFrame, Imgproc.COLOR_RGBA2BGR, 3);

        Imgproc.GaussianBlur(processingFrame, processingFrame, sSize3, 2, 2,
                Imgproc.BORDER_DEFAULT);
        Imgproc.cvtColor(processingFrame, mGray, Imgproc.COLOR_RGBA2GRAY);
        // / Gradient X //
        Imgproc.Sobel(mGray, grad_x, CvType.CV_16S, 1, 0, 3, scale, delta,
                Imgproc.BORDER_DEFAULT);
        Imgproc.Sobel(mGray, grad_x, CvType.CV_16S, 1, 0, 3, scale, delta);
        Core.convertScaleAbs(grad_x, abs_grad_x); // / Gradient Y //
        Imgproc.Sobel(mGray, grad_y, CvType.CV_16S, 0, 1, 3, scale, delta,
                Imgproc.BORDER_DEFAULT);
        Imgproc.Sobel(mGray, grad_y, CvType.CV_16S, 0, 1, 3, scale, delta);
        Core.convertScaleAbs(grad_y, abs_grad_y);
        // / Total Gradient(approximate)
        Core.addWeighted(abs_grad_x, 0.5, abs_grad_y, 0.5, 0, grad);

        iCannyUpperThreshold = 100;
        iMinRadius = 0;
        iMaxRadius  = 0;
        radius = 0;
        Imgproc.HoughCircles(grad, mIntermediateMat, Imgproc.CV_HOUGH_GRADIENT,
                2.0, grad.rows() / 8, iCannyUpperThreshold, iAccumulator,
                iMinRadius, iMaxRadius);

        if (mIntermediateMat.cols() > 0) {
            for (int x = 0; x < Math.min(mIntermediateMat.cols(), 10); x++) {
                double vCircle[] = mIntermediateMat.get(0, x);

                if (vCircle == null)
                    break;
                Log.i("Circle :", "Yes ");
                totalCirclesDetected++;
                pt.x = Math.round(vCircle[0]);
                pt.y = Math.round(vCircle[1]);
                radius = (int) Math.round(vCircle[2]);
                // draw the found circle
                Core.circle(processingFrame, pt, radius, colorRed,
                        iLineThickness);
            }
        } else {
            Log.i("Circle :", "No");
        }

}