Reduction of Blocking Artifacts of DCT Compressed Image Based on Block Wiener Filtering

In this paper, a novel de-blocking algorithm is proposed, using block wiener filtering, shift and weighted average operations. The of block boundary occurs by a mixture of the shift and average operations. However, visually annoying artifacts are visible around the edge region in highly compressed images. In the proposed method, the wiener attenuation coefficients are given based on the expected error in a block unit. The hybrid DCT-Wiener-based (DCT-WB) interpolation scheme provides a powerful framework to interpolate an image by utilizing the information in both spatial and DCT domain. The DCT encoded images have a higher margin of error from one block to another. Hence texture information losses are prevented while smoothening effect is applied to the around the edge region. In examples, the proposed algorithm shows better performance than the