Image enhancement for low-bit-rate JPEG and MPEG coding via postprocessing

Yung-Kai Lai; Jin Li; C.-C. Jay Kuo

doi:10.1117/12.233224

27 February 1996 Image enhancement for low-bit-rate JPEG and MPEG coding via postprocessing

Yung-Kai Lai, Jin Li, C.-C. Jay Kuo

Proceedings Volume 2727, Visual Communications and Image Processing '96; (1996) https://doi.org/10.1117/12.233224
Event: Visual Communications and Image Processing '96, 1996, Orlando, FL, United States

Abstract

JPEG and MPEG compression standards are based on block discrete cosine transform (BDCT) and, when the bit rate becomes low, visually annoying blocking artifacts appear in decompressed images and videos. In this work, we attempt to characterize and quantify the blocking artifact, and then propose an iterative method for its removal by using block classification and space-frequency filtering. The proposed new method is better than the POCS (projection onto convex sets) method in terms of convergence rate, visual appearance and objective mean square error measure.

Citation Download Citation

Yung-Kai Lai, Jin Li, and C.-C. Jay Kuo "Image enhancement for low-bit-rate JPEG and MPEG coding via postprocessing", Proc. SPIE 2727, Visual Communications and Image Processing '96, (27 February 1996); https://doi.org/10.1117/12.233224

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