频域相关的恒常性特征及其算法研究

构造了对空域几何变化具有强鲁棒性的频域相关算法,使模板匹配成为具有几何恒常性特征的原型匹配.傅里叶变换消除信号的平移干扰,对于原点的R（O）能量归一化处理,消除来自比例和尺度对信号幅度的影响,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相关对空域几何干扰的恒常性.实验结果表明,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.

Constancy Properties of Template Matching in Fourier Domain

This paper proposes a template matching algorithm in Fourier transform domain(TMFT),which is robust against geometrical transformations in spacial domain,and makes the template matching to be a prototype matching.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).Energy distributive function is introduced to keep the correlation between templates and target against the rotation relative to template signal. The experiments show that TMFT assures the constancy in template matching and is available to rid the correlativity of geometrical change in time-domain.