基于方向性零樹小波的分形圖像編碼
ORIENTED ZEROTREE WAVELET-BASED FRACTAL IMAGE CODING
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摘要: 該文闡述了分形圖像方塊編碼在小波變換域內(nèi)實現(xiàn)的原理，將零樹概念擴(kuò)展后與小波域的分形仿射變換相結(jié)合，提出一種基于方向性零樹小波的分形圖像編碼方法。計算機(jī)模擬實驗表明，在高壓縮比時，其編碼性能優(yōu)于典型的基于四叉樹分割的分形圖像編碼性能，接近于嵌入式零樹小波編碼(EZW)的性能。
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關(guān)鍵詞:
- 零樹; 小波變換; 分形編碼; 圖像壓縮
Abstract: In this paper,the wavelet-based fractal block image coding is introduced.A new oriented zerotree wavelet-based fractal image coding is presented through the combination of zerotree wavelet and fractal image coding.Experimental results show that the performance of this new approach outperforms that of fractal image coding with quadtrees and is almost comparable to that of embedded zerotree wavelet coding (EZW) at high compression ratios. -
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