光学学报, 1996, 16 (3): 373, 网络出版: 2006-12-04
旋转不变振幅位相合成圆谐滤波器
Rotation Invariant Amplitude Phase Composite Circular Harmonic Filter
光学图像识别 圆谐滤波器 振幅位相合成圆谐滤波器 optical image recognition circular harmonic filter amplitude phase composite circular harmonic filte
摘要
提出了振幅位相合成圆谐滤波器用于旋转不变模式识别。该滤波器的振幅是圆谐滤波器的振幅谱加偏移量后的逆函数,位相是圆谐滤波器的位相谱。计算机模拟实验证明,与传统的圆谐滤波器和纯位相圆谐滤波器相比,振幅位相合成圆谐滤波器具有更好的识别能力,能产生更尖锐的相关峰和更大的输出信噪比。
Abstract
The rotation invariant amplitude phase composite circular harmonic filter (CHF) is proposed. It gives an amplitude spectrum as the inverse of a biased amplitude spectrum of the CHF, and a phase spectrum as the phase spectrum of the CHF. Computer simulation results show that the proposed filter yields a sharper correlation peak, higher signal to noise ration and better correlation discrimination compared with the CHF and the phase only CHF.
参考文献
陈学文, 陈祯培. 旋转不变振幅位相合成圆谐滤波器[J]. 光学学报, 1996, 16(3): 373. 陈学文, 陈祯培. Rotation Invariant Amplitude Phase Composite Circular Harmonic Filter[J]. Acta Optica Sinica, 1996, 16(3): 373.