Name
Title | ||
|---|---|---|
Reduction of blocking effect in DCT-coded images based on a visual perception criterion |
Abstract | ||
|---|---|---|
Blocking effect constitutes one of the main drawbacks of the actual DCT-based compression methods. We propose in this paper a new block reduction technique; it is based on a space-variant non-linear filtering operation of the blocking artifacts present in the image to be reconstructed. To account for the perceptual importance of the distortion, the amount of smoothing is adapted to the visibility of the blocking effect. A visibility parameter is computed for each artifact using the psychovisual properties of the human visual system (HVS). The postprocessing algorithm is in conformity with actual existing compression standards; it provides a way to greatly reduce the artifacts without degrading high-frequency information of the original image. First the proposed method is described and then experimental results are presented, showing the effectiveness of the correction. (C) 1998 Elsevier Science B.V. |
Year | DOI | Venue |
|---|---|---|
1998 | 10.1016/S0923-5965(96)00045-8 | SIGNAL PROCESSING-IMAGE COMMUNICATION |
Keywords | Field | DocType |
image data compression,human visual perception,picture quality | Computer vision,Visibility,Blocking effect,Computer science,Human visual system model,Discrete cosine transform,Image quality,Filter (signal processing),Smoothing,Artificial intelligence,Distortion | Journal |
Volume | Issue | ISSN |
11 | 3 | 0923-5965 |
Citations | PageRank | References |
20 | 2.31 | 3 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| François-Xavier Coudoux | 1 | 51 | 15.85 |
| Marc Gazalet | 2 | 68 | 16.44 |
| Patrick Corlay | 3 | 68 | 15.14 |