An adaptive algorithm for removing the blocking artifacts in block-transform coded images

Jingzhong Yang; Zheng Ma

doi:10.1117/12.657731

4 January 2006 An adaptive algorithm for removing the blocking artifacts in block-transform coded images

Jingzhong Yang, Zheng Ma

Proceedings Volume 5985, International Conference on Space Information Technology; 59852Q (2006) https://doi.org/10.1117/12.657731
Event: International Conference on Space information Technology, 2005, Wuhan, China

Abstract

JPEG and MPEG compression standards adopt the macro block encoding approach, but this method can lead to annoying blocking effects-the artificial rectangular discontinuities in the decoded images. Many powerful postprocessing algorithms have been developed to remove the blocking effects. However, all but the simplest algorithms can be too complex for real-time applications, such as video decoding. We propose an adaptive and easy-to-implement algorithm that can removes the artificial discontinuities. This algorithm contains two steps, firstly, to perform a fast linear smoothing of the block edge's pixel by average value replacement strategy, the next one, by comparing the variance that is derived from the difference of the processed image with a reasonable threshold, to determine whether the first step should stop or not. Experiments have proved that this algorithm can quickly remove the artificial discontinuities without destroying the key information of the decoded images, it is robust to different images and transform strategy.

Citation Download Citation

Jingzhong Yang and Zheng Ma "An adaptive algorithm for removing the blocking artifacts in block-transform coded images", Proc. SPIE 5985, International Conference on Space Information Technology, 59852Q (4 January 2006); https://doi.org/10.1117/12.657731

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KEYWORDS

Image processing

Algorithm development

Computer programming

Image compression

Visualization

Image quality

Video

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