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改进的广义置信度自适应IFS图象压缩编码算法

DOI: 10.11834/jig.2001012250

Keywords: 图象压缩,迭代函数系统,广义置信度,自适应门限,IFS,编码算法

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Abstract:

通过对分块IFS图象压缩编码过程中匹配误差的分析,提出了广义置信度的概念,并据此提出了对输入图象进行四叉树分块的自适应匹配门限(AT)算法。根据排列块的相对复杂程度,修正了自适应匹配门限的公式,提出了改进的自适应门限(RAT)IFS图象压缩编码算法。在对输入图象进行四叉树分块编码过程中,该方法可以根据当前排列块的统计特征确定匹配门限,从而使分块编码过程自动地适应输入图象。实验结果表明,这种新的编码方法可以自适应地对输入图象进行编码,且压缩比较高,有一定的实用性。

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