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具有边缘保持特性的嵌入式图像压缩算法

DOI: 10.11834/jig.20070430

Keywords: 图像处理,边缘检测,小波变换,多尺度分析,SPIHT,零树

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Abstract:

针对小波变换图像压缩存在的边缘模糊问题,提出了边缘检测与压缩编码相结合的方案,首先利用小波变换的多尺度特性提取图像边缘,将其在高频子带内对应的小波系数乘上一个加权因子,然后利用本文提出的无表SPIHT算法进行编码。本文方案结构简单,无需链表,易于硬件实现,而且有效地克服了Gibbs效应,提高了恢复图像质量。

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