摘要
提出了一种消除低照度、中慢速运动视频序列中噪声的方法。在编码的不同阶段采取不同的滤波方法:在预测编码阶段,对于帧内块利用空域相关信息采取高斯去噪方法,对于帧间块利用时域相关信息采取运动补偿去噪策略;在变换编码阶段,采取8×8整数DCT变换的方法,在量化中去除高频噪声。实验结果表明了方法的有效性,降低了码流。
A new method of de-noising caused by dim luminance in usual scene is proposed. The study used different methods in video coding. In the course of prediction, intra macro-blocks reduced Gauss noise by spatial adjacent pixels, and inter macro-blocks used motion compensation filter to eliminate noise by temporal neighboring pixels. In the transform domain, an integral 8 × 8 DCT low pass filter was used to eliminate residual noise in the course of qantization. The experiment results proved that noise and bit rate have been reduced effectively.
出处
《中国体视学与图像分析》
2007年第1期23-27,共5页
Chinese Journal of Stereology and Image Analysis
基金
与公安部第一研究所及上海佳悦公司合作项目
