基于马尔可夫随机场最大后验估计的去块效应方法

被引:2
作者
易清明
石敏
机构
[1] 暨南大学信息科学技术学院电子工程系
基金
广东省科技计划; 广东省自然科学基金;
关键词
块效应; 小波变换; 马尔可夫随机场; 最大后验估计;
D O I
暂无
中图分类号
TP391.41 [];
学科分类号
080203 ;
摘要
基于块离散余弦变换(BDCT)是国际上大多数图像、视频压缩标准的核心部分,它的主要缺点是在低比特率时其恢复图像的块边界上会出现明显可见的方块效应,降低了图像的视觉质量。文章提出了一种新的基于马尔可夫随机场最大后验估计(MRF-MAP)的块效应消除算法,目的是实现在尽量消除块效应的同时充分地保护图像的边缘信息。文中通过线性回归,给出了设置MRF算法中的Huber函数阈值的数学公式,由该公式得到的阈值可以在保护图像边缘和提高图像质量之间有较好的折中。仿真结果验证了该文算法的有效性。
引用
收藏
页码:6 / 8+33 +33
页数:4
相关论文
共 10 条
[1]  
Removing the blocking artifacts of block-based DCT compressed images. Y Luo,R Kward. IEEE Trans on Image and Processing . 2003
[2]  
Blocking effect reduction of JPEG images by signal adaptive filtering. Y L Lee,H C Kim,H W Park. IEEE Transactions on Image Processing . 1998
[3]  
Blocking effect reduction of JPEG images by signal adaptive filtering. Y L Lee,H C Kim,H W Park. IEEE Transactions on Image Processing . 1998
[4]  
An efficient wavelet-based deblocking algorithm for highly compressed images. S Wu,Yan H,Tan Z. IEEE Trans on Circuits Systems for Video Technology . 2001
[5]  
Iterative procedure for reduction of blocking effects in transform image coding. A Zakhor. IEEE Transactions on Circuits and Systems for Video Technology . 1992
[6]  
Improved image decompression for reduced transform coding artifacts. T P Rourke,R L Stevenson. IEEE Transactions on Circuits and Systems for Video Technology . 1995
[7]  
Reduction of blocking effect in DCT-coded images using zero-masking techniques. B Zing. IEEE Transactions on Image Processing . 1999
[8]  
Efficient DCT-domain blind measurement andreduction of blocking artifacts. S Z Liu,C B Alan. IEEE Transactions on Circuits and Systems for Video Technology . 2002
[9]  
Blocking artifacts suppression in block-coded images using overcomplete wavelet representation. W Alan,C Liew,Y Hong. IEEE Trans on Circuits Systems for Video Technology . 2004
[10]  
Derivation of prediction equations for blocking effect reduction. G Lakhani,N Zhong. IEEE Transactions on Circuits and Systems for Video Technology . 1999