多小波零树图像编码方法研究

Study of Multiwavelet Zerotree Image Coding

多小波变换兼有对称性、正交性、光滑性和有限支撑等信号处理中的十分重要的性质,特别适用于图像的压缩编码。该文采用能量集中率很高的多小波预处理方法,对多小波变换系数采用多门限逐级量化方法,提出了一种新的多小波零树图像编码方案,仿真试验表明了该方法的优越性。

Multiwavelet possesses such very important properties in signal processing as orthogonality,symmetry,smoothness,and short support,which is specially applicable to image coding for compression.This paper introduces a high energy-compaction-rate prefiltering,and proposes a new multiwavelet zerotree image coding method that is based on multi-threshold quantization.The simulation indicates the advantages of the method.