基于Surfacelet变换的3D Context模型视频去噪新方法  

A Novel Video Denoising Method with 3D Context Model Based on Surfacelet Transform

作　　者：肖弘智[1] 闫敬文[1] 屈小波[2] 

机构地区：[1]汕头大学电子工程系,广东汕头515063 [2]厦门大学通信工程系,福建厦门361005

出　　处：《电子学报》2008年第7期1460-1464,1440,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60472081);航空科学基金(No.05F07001)

摘　　要：本文将3D Context模型应用于Surfacelet变换域,提出一种新的视频去噪方法.Surfacelet变换(ST)是一种新的3D变换,具有多方向分解、各向异性和低冗余度等性质.根据视频信号ST域内系数和噪声分布的特征,将2DContext模型拓展到3D,按照能量分布将ST系数分成多个子块,每个子块有独立的能量和阈值估计.实验结果表明,本文算法噪声抑制效果明显优于分层2D去噪声方法和其它现有的3D方法,去噪视频的PSNR值提高了约2dB.从视觉效果来看,本文算法在去除噪声的同时,能很好的保留视频图像细节,运动物体非常平滑,有效解决传统算法中存在的拖影、闪烁等问题,尤其适合于包含剧烈运动和丰富纹理图像的视频.We propose a novel video denoising method with 3D Context Model in Surfacelet Transform Domain（3DCMST） in this paper. In order to take advantage of the characteristic of the coefficients, the Context model was extended from 2D to 3D. The ST coefficients were divided into several parts according to their energy distribution by 3D Context model and each part had independent energy estimate and threshold. Experimental results show that the proposed method achieves better denoising performance than other 3D or hierarchical 2D denoising methods, and remarkably improves the PSNR of video about 2dB. In terms of visual quality, the proposed method can effectively preserve the video detail, and the trajectory of motion object is very smooth, which is especially adequate to process the video frames with acute movement and plenty of texture.

关 键 词：视频去噪 Surfacelet变换 三维Context模型 方向滤波器组 

分 类 号：TN911.73[电子电信—通信与信息系统]