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基于拟Haar变换的模板匹配算法

Keywords: 模板匹配,非标准模板,正交Haar变换(OHT),拟Haar变换(QHT),树分解策略

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Abstract:

基于正交Haar变换(orthogonalHaartransform,OHT)的模板匹配算法在处理二维图像时采用条形和来替代积分图,从而获得了较高的运行效率,但它要求模板必须是标准大小的,即模板的高和宽必须相等且为2的幂次.为解决OHT算法的这一问题,提出了另一种基于拟Haar变换(quasiHaartransform,QHT)的模板匹配算法,它使用树分解策略来加速非标准模板时的匹配处理.QHT算法不仅能处理非标准模板的情况,也同样能处理标准模板的情况.在标准模板情况下,实验结果表明,QHT算法在低噪声等级时比OHT算法拥有更快的运行速度.

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