Regularized reconstruction to remove blocking artifacts from block discrete cosine transform compressed images

Yongyi Yang; Nikolas P. Galatsanos; Aggelos K. Katsaggelos

doi:10.1117/12.157970

22 October 1993 Regularized reconstruction to remove blocking artifacts from block discrete cosine transform compressed images

Yongyi Yang, Nikolas P. Galatsanos, Aggelos K. Katsaggelos

Author Affiliations +

Proceedings Volume 2094, Visual Communications and Image Processing '93; (1993) https://doi.org/10.1117/12.157970
Event: Visual Communications and Image Processing '93, 1993, Cambridge, MA, United States

Abstract

In most block-transform based codecs (coder-decoder) the compressed image is reconstructed using only the transmitted data. In this paper, the reconstruction is formulated as a regularized image recovery problem where both the transmitted data and prior knowledge about the properties of the original image are used. This is accomplished by minimizing an objective function, using iterative algorithms, which captures the smoothness properties of the original image. Experimental results are presented which demonstrate that the proposed regularized algorithms yield reconstructed images with superior quality, both visually and using objective distance metrics, to that of traditional decoders that use only the transmitted transform coefficients.

Citation Download Citation

Yongyi Yang, Nikolas P. Galatsanos, and Aggelos K. Katsaggelos "Regularized reconstruction to remove blocking artifacts from block discrete cosine transform compressed images", Proc. SPIE 2094, Visual Communications and Image Processing '93, (22 October 1993); https://doi.org/10.1117/12.157970

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