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研究了小波系数的分布规律和统计特性，分析了各种小波系数对恢复图象质量的影响，从而为基于小波变换的图象数据压缩提供了量化方法。
The distribution and statistical properties of wavelet coefficients are studied. The influence of various wavelet coefficients on the quality of restored image is analyzed. The quantization method of image data compression based on wavelet transform is provided.