作　　者： ;

机构地区： 暨南大学

出　　处： 《计算机工程》 2007年第9期15-18,共4页

摘　　要： 构造了对空域几何变化具有强鲁棒性的频域模板匹配算法,使模板匹配成为具有几何恒常性特征的原型匹配。傅立叶变换提取信号的平移不变性;用原点自相关函数值R(0)进行能量归一化处理,消除信号幅度比例的影响;通过对数变换将空域尺度变化转化为可在频域中消除的平移变化;引入能量分布函数,消除来自空间旋转对匹配的影响,从原理上保证了频域模板匹配算法对空域几何干扰的恒常性。实验表明,该算法能够有效消除来自空域的几何变化对模板匹配过程的干扰。 This paper proposes a template match algorithm in fourier transform domain（TMFT）, which is robust against geometrical change in spacial domain, and makes the template match to be a prototype match. Time-shifting of signal in time-domain is eliminated by time-shifting property of FT. Disturbance out of signal intensity is normalized by the auto-correlativity R（0）. Semi-logarithm transforms the scale factor in time-domain to time-shifting. Energy distributive function is introduced to keep the correlation between template and target against the rotation relative to template signal. The experiments show that TMFT assures the constancy in template match and is available to rid the correlativity of geometrical change in time-domain.

关 键 词： 匹配 相关 不变性 几何变化

领　　域： [电子电信] [电子电信]