摘要
研究了基于提升方案的 Deslauriers- Dubuc( m ,n)插值小波变换结合 SPIHT应用于图象无损压缩编码的性能 .实验结果表明 ,基于提升方案和整数运算的插值小波变换是整 -整可逆变换 ,适于快速的 ,渐进性的直至无损图象压缩 .无损压缩性能远好于 Huffm an、Win Rar、Raw+ Win Zip、JPEGL S.以 ( 4,4)插值小波为例平均而言压缩比分别比上述编码方法提高了 63 % ,49% ,46% ,3 4%左右 .由于实现的可逆小波变换是基于整数运算的 ,可由加法和移位完成 ,运算速度快 。
An image lossless compression coding performance is researched for Deslauriers-Dubuc(m,n)interpolating wavelet transform with SPIHT based on lifting scheme .experimented result indicate that The Transform is integer-integer invertible transform based on lifting scheme and integer operation , suitable fast and in progressively until to image lossless compression .performance of lossless compression is well good then popular Huffman?WinRar? Raw+WinZip?JPEGLS. For example in (4,4) by comparison whit these method average improved the compression rate by about 63%,49%,46%,34% respectively . due to invertible transform is based on integer operation may be by addition and shift completed, so that fast and easy to dynamic image coding and hardware implement.
出处
《小型微型计算机系统》
CSCD
北大核心
2002年第12期1465-1468,共4页
Journal of Chinese Computer Systems
基金
中国科学院知识创新工程青年基金 (项目号 Q0 1H0 1)资助
