title: Improve image quality
body: <p>I need to improve image quality, from low quality to high hd quality. I am using <strong>OpenCV</strong> libraries. I experimented a lot with GaussianBlur(), Laplacian(), transformation functions, filter functions etc, but all I could succeed is to convert image to hd resolution and keep the same quality. Is it possible to do this? Do I need to implement my own algorithm or is there a way how it's done? I will really appreciate any kind of help. Thanks in advance.</p>