B. He, Y. Cong (PRC), and H.Y. Wang (USA)
Blocking artifact, DCT, gradient, post-processing.
Based on the technique [1] and the gradient continuity of natural image, an improving speed post processing technique for the blocking artifact in transform coded image at low bit rate is presented. Moreover, the detecting function is applied to extract the adjacent two blocks with the blocking artifact and is combined with the DCT-based adaptive post-processing technique [1] for reducing the blocking artifacts of the decoded image. The new technique is used to process JPEG compressed image and results show improvement in both effective DCT operation and peak-signal to noise ratio (PSNR) with preserving the image quality.
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