Chen X W, Chen Z P
Appl Opt. 1995 Feb 10;34(5):879-85. doi: 10.1364/AO.34.000879.
An amplitude-modulated circular-harmonic filter is proposed for rotation-invariant pattern recognition. We investigate the filter characteristics by varying two design parameters, A(ρ) and B(ρ), and select optimum values to design an amplitude-modulated circular-harmonic filter. When compared with the phase-only circular-harmonic filter, the amplitude-modulated circular-harmonic filter is found to yield a sharper correlation peak, a better noise tolerance, and an improved correlation discrimination.
提出了一种用于旋转不变模式识别的调幅圆谐波滤波器。我们通过改变两个设计参数A(ρ)和B(ρ)来研究滤波器特性，并选择最佳值来设计调幅圆谐波滤波器。与纯相位圆谐波滤波器相比，发现调幅圆谐波滤波器能产生更尖锐的相关峰、更好的噪声容限和更高的相关分辨率。
