24-bit color image quantization for 8-bits color display based on Y-Cr-Cb

Long-Wen Chang; Tsann-Shyong Liu

doi:10.1117/12.158620

20 October 1993 24-bit color image quantization for 8-bits color display based on Y-Cr-Cb

Long-Wen Chang, Tsann-Shyong Liu

Proceedings Volume 2028, Applications of Digital Image Processing XVI; (1993) https://doi.org/10.1117/12.158620
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

A new fast algorithm that can display true 24-bits color images of JPEG and MPEG on a 8 bits color display is described. Instead of generating a colormap in the R-G-B color space conventionally, we perform analysis of color images based on the Y-Cr-Cb color space. By using Bayes decision rule, the representative values for Y component are selected based on its histogram. Then, the representative values for Cr and Cb components are determined by their conditional histogram assuming Y. Finally, a fast lookup table that can generate R-G-B outputs for Y-Cr-Cb inputs without matrix transformation is addressed. The experimental results show that good-looking quality color quantization images can be achieved by our proposed algorithm.

Citation Download Citation

Long-Wen Chang and Tsann-Shyong Liu "24-bit color image quantization for 8-bits color display based on Y-Cr-Cb", Proc. SPIE 2028, Applications of Digital Image Processing XVI, (20 October 1993); https://doi.org/10.1117/12.158620

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