| 摘要 |
<p>A method for reducing blocking artifacts using a projections onto the overcomplete basis (POCB) algorithm, and a postprocessor therefor, are provided. In a conventional method for reducing blocking artifacts, the blocking artifacts are not completely removed since only the change of pixel values at a block boundary is considered. In order to solve the problem, an image is postprocessed by a linear combination of continuous functions with respect to an input decoded image, considering that an image signal is constructed of continuous two dimensional planes, in the present invention. The linear coefficients of the continuous functions are obtained using the POCB algorithm. Accordingly, it is possible to provide a restored image in which the blocking artifacts are effectively removed, in areas such as edges and textures as well as in a flat image. <IMAGE></p> |
