Reduction of blocking artifacts using side information
Fatih Kamışlı, Jae S. Lim · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2006
Block-based image and video coding systems are used extensively in practice. In low bit-rate applications, however, they suffer from blocking artifacts. Reduction of blocking artifacts can improve visual quality and PSNR. Most methods in the literature that are proposed to reduce blocking artifacts apply post-processing techniques to the compressed image. One major benefit of such methods is no modification to current encoders. In this paper, we propose an approach where blocking artifacts are reduced using side information transmitted by the encoder. One major benefit of this approach is the ability to compare the processed image directly with the original undegraded image to improve the performance. For example, we could process an image with different methods and transmit the most effective method as part of the side information. A major question in using our proposed approach and compare it with a post-processing type of system and illustrate that the proposed approach has the potential to be beneficial in both visual quality and PSNR for some range of coding bit-rates.