圖象的矩形變換矢量量化編碼法
A METHOD OF IMAGE VECTOR QUANTIZATION CODING USING RECTANGULAR TRANSFORM
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摘要: 本文介紹了簡單、實用的矩形變換和近幾年來迅速發(fā)展的矢量量化技術(shù).并把矩形變換和矢量量化技術(shù)結(jié)合在一起應(yīng)用于圖象的數(shù)據(jù)壓縮.這種結(jié)合降低了矢量編碼的維數(shù),相應(yīng)的碼書尺寸能適當(dāng)?shù)牡玫綔p小.此方法加快了矢量編碼的進(jìn)程,減少了存貯量,編碼率得到進(jìn)一步減小.計算機(jī)模擬實驗證明這種方法對圖象的數(shù)據(jù)壓縮是非常有效的.
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關(guān)鍵詞:
- 圖象處理; 矩形變換; 矢量量化; 數(shù)據(jù)壓縮; 編碼
Abstract: A simple and practical rectangular transform and the vector quantization technique are described. A method for image data compression by combining the rectangular transform with vector quantization technique is presented. By using this method, the dimension of vector coding and the size of the corresponding codebook are reduced; the vector encoding process is picked up; and also the coding rate is reduced. The results of simulation show that this coding method is very effective in the field of image coding. -
姚慶棟等編著,圖象編碼基礎(chǔ),人民郵電出版社,北京,1984年,第六章.[2]K. Sivaraman, K.P.Rajappan, Signal Processing, 5(1983)4, 377-383.[3]T. S. Huang, Picture Processing and Digital Filtering, New York, 1979, Chapter 2.[4] Robert M. Gray, Vector Quantization, IEEE Trans. on ASSP, ASSP-32(1984)4, 4-29.[4]Y. Linde, A.Buzo, and R.M. Gray,An Algorithm for Vector Quantizer Design, IEEE Trans. on COM, COM-28(1980)1, 84-95.[5]汪凱,宋國文,矢量量化編碼圖象恢復(fù)質(zhì)量的改善,全國信息論與通信理論學(xué)術(shù)會議論文,長春,1987年. -
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