摘要
基于零树小波编码的图象在高压缩比时会产生振铃失真。本文分析了失真的原因,提出采用边沿增强与一维维纳滤波相结合的方法减少失真。实验结果表明,这种方法简单有效,能够提高图象的主观质量与客观指标PSNR。
Ringing distortion would exist in zero-tree wavelet encoded images with high compression-ratio. The cause leading to the distortion is investigated and a scheme of solution using edge enhancement combined with 1D-Wiener filtering is proposed to reduce the distortion. Experimental results demonstrate that the quality of such images can be improved effectively both in subjective and objective point of view.
出处
《电路与系统学报》
CSCD
2000年第4期70-72,共3页
Journal of Circuits and Systems
关键词
小波变换
零树编码
图象增强
维纳滤波
Wavelet transform
zero-tree encoding
image enhancement
Weiner filtering