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Proceedings Paper

Fast DCT block smoothing algorithm
Author(s): Rensheng Horng; Albert J. Ahumada
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Paper Abstract

Image compression based on quantizing the image in the discrete cosine transform (DCT) domain can generate blocky artifacts in the output image. It is possible to reduce these artifacts and RMS error by adjusting measures of block edginess and image roughness, while restricting the DCT coefficient values to values that would have been quantized to those of the compressed image. This paper presents a fast algorithm to replace our gradient search method for RMS error reduction and image smoothing after adjustment of DCT coefficient amplitude.

Paper Details

Date Published: 21 April 1995
PDF: 12 pages
Proc. SPIE 2501, Visual Communications and Image Processing '95, (21 April 1995); doi: 10.1117/12.206752
Show Author Affiliations
Rensheng Horng, Stanford Univ. (United States)
Albert J. Ahumada, NASA Ames Research Ctr. (United States)


Published in SPIE Proceedings Vol. 2501:
Visual Communications and Image Processing '95
Lance T. Wu, Editor(s)

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