基于小波分析的图像压缩编码技术

Image compression encoding technique based on wavelet analysis

分析了小波分解原理及图像编码技术,提出了在小波变换的低频子带直接采用哈夫曼编码;为保证压缩比可对高频子带采用改进EZW编码方法量化编码、以像素块为单位比较阈值;从而在信噪比基本稳定的条件下,提高压缩效率.

The paper analyzes the wavelet resolving principle and image encoding technique and puts forward the adoption of Huffman-encoding on low-frequency of wavelet transformation. To ensure image compressing ratio, in the part of high-frequency encoding is quantized through the improvement of EZW encoding, and the threshold value is compared by the image block. Accordingly, the compressing efficiency is improved on condition that the signal-noise ratio is largely stable.