摘要
整数CDF(2,2)、CDF(2,4)可逆双正交小波变换可以由加法和移位完成,运算速度快,便于硬件实现。CDF(2,2)结合SPIHT编码的无损图象压缩比与ARJ,JPEGLS,整数Haar变换结合DPCM相比分别平均提高了40%,30%,15%左右。而CDF(2,4)与CDF(2,2)的对比研究结果表明,CDF(2,4)的渐进性直至无损图象压缩性能好于CDF(2,2)。
Integer CDF(2,2),CDF(2,4)biorthogonal wavelet transform may be completed by add and shift operation,fast,easy to implemented by hardware.Losless encoding of CDF(2,2)combine with SPIHT comparison whit ARJ ,JPEGLS and integer Haar wavelet transform with DPCM,improved compression rate by40%,30%,15%respectively.Contrastive research result indicated CDF(2,4)is better then CDF(2,2)for progressively and lossless image compression.
出处
《计算机工程与应用》
CSCD
北大核心
2002年第24期58-59,73,共3页
Computer Engineering and Applications
基金
中国科学院知识创新工程青年基金资助项目(编号:Q01H01)
