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22 December 1998 Trellis-coded color quantization of images
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We examine color quantization of images using trellis coded quantization (TCQ). Together with a simple halftoning scheme, an eight-bit trellis coded color quantizer reproduces images that are visually indistinguishable from the 24-bit originals. The proposed algorithm can be viewed as a predictive trellis coded color quantization scheme. It is universal in the sense that no training or look-up table is needed. The complexity of TCQ is linear with respect to image size, making trellis coded color quantization suitable for interactive graphics and a window-based display environment.
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Zixiang Xiong, Jian Qiao Huang, and Xiaolin Wu "Trellis-coded color quantization of images", Proc. SPIE 3648, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts IV, (22 December 1998);


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