A HDTV video de-noising algorithm based on spatial-temporal filtering
CHEN Xiao-hong1,2,WANG Wei-dong1,2
1. Department of Information Science and Engineering, Zhejiang University, Hangzhou 310027, China;
2. Zhejiang Provincial Key Laboratory of Information Network Technology, Hangzhou, China
For the more severe noise interference and the limited hardware arithmetic resources in high definition television, a spatial-temporal video de-noising algorithm was proposed. The noise intensity was calculated by a statistical method. The spatial filtering window was adjusted adaptively according to the noise level and edge information. The temporal filtering window was adjusted by motion detection. The edge areas and the smooth areas were filtered by different spatial-temporal filters in proposed algorithm. The edge areas were filtered by simplified bilateral filters and the smooth areas were filtered by linear filters. The noise can be removed effectively, while keeping the edge information. Experimental results show that the average peak signal-noise ratio in proposed algorithm is at least 0.3dB higher compared with other spatial-temporal algorithms.
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