摘要
研究了基于提升方案的CDF(m,n)双正交小波变换结合SPIHT应用于图象无失真压缩编码的方法。实验结果表明,基于提升方案和整数运算的CDF(m,n)变换是整-整可逆变换,CDF(2,n)的无失真压缩性能好于流行的Huffman、WinRar、Raw+WinZip、JPEGLS。压缩比分别比上述编码方法提高了62%,47%,44%,32%左右。运算速度快,便于硬件实现。
This paper studies an image lossless compression coding method based on the CDF (m,n)invertible or thogonal wavelet transform of lifting scheme and SPIHT. The experimental results show that the CDF(m,n) transform based on lifting scheme and integer operation, is an integer_integer invertible transform, and that the image lossless compression performance of CDF(2,n) is better than that of Huffman, NinRar,Raw+WinZip, JPEGLS. The compression rate has been improved by 62%,47%,44% and 32%,respectively.Its fast operation speed makes hardware implementation easier.
出处
《光学精密工程》
EI
CAS
CSCD
2002年第6期564-568,共5页
Optics and Precision Engineering
基金
中国科学院知识创新工程青年基金资助项目(Q01H01)
关键词
提升方案
无失真图像压缩
可逆双正交小波变换
SPIHT
lifting scheme
image loss_less compression
CDF(m,n) invertible bi_orthogonal wavelet transform
SPIHT
