一種基于人類視覺系統(tǒng)的去塊效應(yīng)算法
A Deblocking Algorithm Based on HVS
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摘要: 基于塊離散余弦變換的圖像和視頻壓縮主要缺點(diǎn)就是在低比特率時(shí)會(huì)在塊邊界出現(xiàn)明顯的方塊效應(yīng)。本文提出一種充分利用人類視覺特性，在圖像的平滑區(qū)和紋理區(qū)分別采用一維DCT域?yàn)V波和空間域?yàn)V波的去塊效應(yīng)算法。實(shí)驗(yàn)結(jié)果表明該算法既能有效地去除方塊效應(yīng)又能保護(hù)圖像的邊緣信息。
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關(guān)鍵詞:
- 塊離散余弦變換; 方塊效應(yīng);人類視覺系統(tǒng); 斜率均方差
Abstract: A major drawback related to the Block-based Discrete Cosine Transform(BDCT) for image and video compression is that the decoded images, especially at very low bit rates,exhibit highly noticeable blocking artifact near the block boundaries. In this paper, a deblocking algorithm based on Human Visual System (HVS) is proposed. For smooth regions, one dimension DCT domains filter is applied to reduce the blocking artifacts, but for texture regions a spatial filter is used. The experimental results show that the proposed algorithm reduces the blocking artifacts effectively and preserves the original edges faithfully. -
Reezve H, Lim J. Reduction of blocking effect in image coding [C][J].in Proc. ICASSP83, Boston.1983, 8:1212-1215[2]Lee Y L, Kim H C, Park H W. Blocking effect reduction of JPEG images by signal adaptive filtering [J]. IEEE Trans. on Image Processing. 1998, 7(2): 229-234.[3]Yang Y, Galatsanos N P, Katsaggelos A K. Regularized reconstruction to reduce blocking artifacts of block discrete cosine transform compressed images [J].IEEE Trans.on Circuits Sys.Video Technol.1993, 3(6):421-432[4]Stevenson R L. Reduction of coding artifacts in transform image coding [C][J].IEEE Int.Conf. Acoustics, Speech,and Signal Processing , Minneapolis.1993, 5:401-404[5]Zeng B. Reduction of blocking effect in DCT-coded images using zero-masking techniques [J].Signal Processing.1999, 79(2):205-211[6]Liu S Z, Bovik A C. Efficient DCT-domain blind measurement and reduction of blocking artifacts [J].IEEE Trans. on Circuits Syst. Video Technol.2002, 12 (12):1139-1149[7]Luo Y, Ward R K. Removing the blocking artifacts of block-based DCT compressed images [J].IEEE Trans. on Image Processing.2003, 12(7):838-842[8]Lakhani G , Zhong N. Derivation of prediction equations for blocking effect reduction [J].IEEE Trans. on Circuits Syst. Video Technol.1999, 9(3):415-418[9]Karunaseker S A, Kingsbury N G. A distortion measure for blocking artifacts in image based on human visual sensitivity [J].IEEE Trans. on Image Processing.1995, 4(6):713-724[10]Coudoux F X, Gzalet M , Corlay P. Reduction of blocking effect in DCT-coded images based on a visual perception criterion [J].Signal Processing : Image Commun.1998, 11(3):179-186[11]Nill N B. A visual model weighted cosine transform for image compression and enhancement [J]. IEEE Trans. on Commun. 1985, 33(6): 551-556.[12]Gao W F, Mermer C, Kim Y. A De-blocking algorithm and a[13]blockiness metric for highly compressed images [J]. IEEE Trans[J].on Circuits Syst. Video Technol.2002, 12(12):1150-1159 -
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