Wavelet-based embedded zerotree extension to color coding

Victoria T. Franques

doi:10.1117/12.304870

26 March 1998 Wavelet-based embedded zerotree extension to color coding

Victoria T. Franques

Proceedings Volume 3391, Wavelet Applications V; (1998) https://doi.org/10.1117/12.304870
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States

Abstract

Recently, a new image compression algorithm was developed which employs wavelet transform and a simple binary linear quantization scheme with an embedded coding technique to perform data compaction. This new family of coder, Embedded Zerotree Wavelet (EZW), provides a better compression performance than the current JPEG coding standard for low bit rates. Since EZW coding algorithm emerged, all of the published coding results related to this coding technique are on monochrome images. In this paper the author has enhanced the original coding algorithm to yield a better compression ratio, and has extended the wavelet-based zerotree coding to color images. Color imagery is often represented by several components, such as RGB, in which each component is generally processed separately. With color coding, each component could be compressed individually in the same manner as a monochrome image, therefore requiring a threefold increase in processing time. Most image coding standards employ de-correlated components, such as YIQ or Y, C_B, C_R and subsampling of the 'chroma' components, such coding technique is employed here. Results of the coding, including reconstructed images and coding performance, will be presented.

Citation Download Citation

Victoria T. Franques "Wavelet-based embedded zerotree extension to color coding", Proc. SPIE 3391, Wavelet Applications V, (26 March 1998); https://doi.org/10.1117/12.304870

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