A Comparative Study of Various Filtering Techniques

Image processing is a fast growing area of active research. It comprises methods to perform several useful operations on images, to modify/enhance the image or to tease out useful information from it. A very basic application of image processing is image filtering. Filtering is a technique of image modification or enhancement. We filter an image to enhance some features or to get rid of other features - the techniques include smoothing, sharpening, edge enhancement. Here we apply different smoothing and edge enhancement filtering methods to an image and evaluate the quality of the image in both cases using an image quality assessment technique called BRISQUE and by calculating the PSNR ratio of images.