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|標題:||A VQ COMPRESSION METHOD BASED ON THE VARIATIONS OF THE IMAGE BLOCK GROUPS||作者:||Chan, Y.K.
|關鍵字:||VQ Standard deviation;LBG algorithm;Codebook;structured vector quantization;algorithm;retrieval||Project:||International Journal of Innovative Computing Information and Control||期刊/報告no：:||International Journal of Innovative Computing Information and Control, Volume 6, Issue 10, Page(s) 4527-4537.||摘要:||
The conventional LBG; (Linde-Buzo-Cray) algorithm consumes a great amount of mailing time to generate a codebook In addition, it gives more codewords for describing the image regions with higher pixel intensity variance, but, fewer codewords for depicting those with lower pixel intensity variance. This paper proposes a group-based VQ codebook generation method (GBVQCG method) to build a codebook It classified the image blocks of an image into groups and determines the number of desired codewords which will be extracted from the image blocks in each group according to the standard deviation and the number of image blocks in the group. The experimental results show that the GBVQCG method generally performs much better in. terms of the running, time and the quality of the decompressed image, compared with the LBG compression method
|Appears in Collections:||資訊管理學系|
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