Skip to Main Content
This paper presents a pre/post-filtering method to reduce the reconstruction errors near block boundaries in wavelet-based image and video compression. It can be used effectively to mitigate the tiling artifact in JPEG2000 and the jittering artifact in 3D wavelet-based video compression. In this method, a short prefilter is applied across the boundaries of image tiles or video frame groups before wavelet compression, and a post-filter is applied at the same place after wavelet reconstruction. The optimal pre/postfilter is obtained by formulating and solving the corresponding rate-distortion optimization problem. A low-complexity structure is then proposed to approximate the optimal solution. The performance of the proposed method is demonstrated by both image and video coding examples.
Image Processing, 2004. ICIP '04. 2004 International Conference on (Volume:1 )
Date of Conference: 24-27 Oct. 2004