Deblock Algorithm for Compressed Image Based on Adaptive Space Domain Filtering
Huixian Sun · Jisuanji gongcheng · 2009
Block lossy image compression often introduces quantization noise which exhibits block artifact in the reconstructed image especially when the compression ratio is high.This paper introduces a deblock algorithm using space domain adaptive filtering.The algorithm uses an edge-adaptive filter to smooth the block edges of the image to alleviate the block artifact.The uniform blocks of the image is detected using a variation-based method and is smoothed using a neighbor block-relied filtering method.Experimental results show that the block artifact is alleviated effectively while PSNR is improved in the objective respect.