private double clipToByteRange (double value){
		if (value > 255){
			value = 255;
		}else if (value < 0){
			value = 0;
		}
		return value;
	}

	private Mat processShowImage(Mat imageMat) {
	    // Show loaded image
		imgPanel1.setImage(Mat2BufferedImage(imageMat));

		Mat grayImage = new Mat();
     	Imgproc.cvtColor(imageMat, grayImage, Imgproc.COLOR_BGR2GRAY);

     	double alpha = 2.2; //for Contrast adjustment
     	double beta = 50; // for brightness adjustment
     	Mat processedImage = Mat.zeros(imageMat.size(), imageMat.type());

     	for (int y = 0; y < imageMat.rows(); y++){
     		for (int x = 0; x < imageMat.cols(); x++){
     			int noOfChannels = imageMat.channels();
     			double[] components =  new double[noOfChannels];
     			components = imageMat.get(y, x);
     			for (int c = 0; c < noOfChannels; c++){
     				components[c] = clipToByteRange(alpha * components[c] + beta);
     			}
     			processedImage.put(y,  x,  components);

     		}
     	}
     	// Show processed image
	    imgPanel2.setImage(Mat2BufferedImage(grayImage));
		pack();

		return grayImage;
	}