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主辅扫描混合编码的嵌入零树小波改进算法

DOI: 10.11834/jig.20090914

Keywords: JPEG2000,改进算法,混合编码,图像压缩,小波

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Abstract:

提出了主辅扫描混合编码的嵌入式零树小波(EZW)改进算法。使前一阈值下大系数的辅扫描编码和解码优先进行,构成一个新的辅扫描过程;合并了主扫描和新发现的大系数的辅扫描为一个新的主扫描过程,使编码和解码更精细有效。实验结果表明,与传统的EZW算法相比,该改进算法明显提高了图像压缩的峰值信噪比。

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