Improved edge-directed super resolution

摘要

Super resolution is necessary when the resolution of an image is lower than the screen resolution of a digital display device. Usually, interpolation operation is used in the image super-resolution process. However, the existing image interpolation methods suffer blurring problems in edge regions, so it is hard to produce sharp and clear visual effects. In this paper, we propose an improved edge-directed super resolution, which keeps the edges sharp and provides good image quality. We first check whether there is an edge or not and then an interpolation method is selected according to the existence and the direction of an edge. Experimental results demonstrate that good image quality can be achieved.