Color space choice for nearly reversible image compression

Albert A. Deknuydt; J. Smolders; Luc Van Eycken; Andre J. Oosterlinck

doi:10.1117/12.131401

1 November 1992 Color space choice for nearly reversible image compression

Albert A. Deknuydt, J. Smolders, Luc Van Eycken, Andre J. Oosterlinck

Proceedings Volume 1818, Visual Communications and Image Processing '92; (1992) https://doi.org/10.1117/12.131401
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

In applications where nearly reversible color image compression is required, the choice of an appropriate color space is a major factor determining the attainable compression ratio. The optimal choice would satisfy the following conditions: (1) Decorrelate the data as much as possible. (2) Minimize the total number of bits in the data path needed for a certain quality level (assuming a truly reversible component compression scheme). (3) Need no calculations with critical accuracy. We compared several known linear color transformations (under the assumption that the original data was represented in RGB) with respect to these conditions. Decorrelation and entropy reduction were calculated. The number of bits required to guarantee a certain quality level measured in (Delta) Lab units was determined. The effects of transformation coefficient quantization were checked. As a result, a simple transformation needing no multipliers at all is proposed.

Citation Download Citation

Albert A. Deknuydt, J. Smolders, Luc Van Eycken, and Andre J. Oosterlinck "Color space choice for nearly reversible image compression", Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); https://doi.org/10.1117/12.131401

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