Codeword-dependent post-filtering for vector quantization-based

Details Codeword-dependent post-filtering for vector quantization-based Codeword-dependent post-filtering for vector quantization-based

1993-04-30

1997-12-09

Couso, Yon J.

Image analysis

Image enhancement or restoration

Edge or contour enhancement

382253, 382268, G06K 940

Patent

active

056968515

ABSTRACT:
The quality of reconstructed images is improved by a post-processing method at the decoder which uses codeword-dependent, spatially-varying 2-dimensional filters. The post-filtering, working across block boundaries, reduces coding artifacts and increases the signal-to-noise ratio. The technique is applicable for use with any VQ-based image compression and can also be used in conjunction with image magnification.

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