基于感知度量的分形编码
DOI: 10.11834/jig.199809220
Keywords: 人眼视觉模型,分形编码,DCT变换
Abstract:
传统的分形编码利用最小均方差准则（MMSE）来度量图象子块的变换匹配，未能充分利用人眼的视觉特征。本文提出了基于人眼视觉模型的分形编码方案。算法中，按视觉上的差异对图象子块进行分类；由“视觉最相似”的准则确定最佳匹配的域块，为此，相似匹配转换到DCT域进行，导出了图象块的相似匹配在DCT域的形式；算法进一步通过自适应误差校正来消除解码图象中的方块效应。解码图象的视觉质量有了明显的改善。实验结果证实了算法的有效性。
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