This paper presents a no-reference quality metric for evaluating the blocking artifacts in images. It is based on a finding that the blocking artifact has direct effect on the distribution of discrete Tchebichef moments. The image is first divided into target blocks that cover potential artifacts. Tchebichef moments are then extracted as the block features. A local artifact score is computed by comparing the coefficients of the moments and the overall quality metric is obtained by taking the average of local estimates. Simulation results and comparisons demonstrate the advantage of the method.
|Number of pages||8|
|Journal||Journal of Information Hiding and Multimedia Signal Processing|
|Publication status||Published - 1 Oct 2014|
- Blocking artifacts
- Image quality assessment
- Tchebichef moment