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We propose a new kind of filter, it is the complex conjugate of the Fourier transform of the circular harmonic phase component. Our theoretical analysis verify that this kind of filter is fully rotational invariant. The computer simulation results show that this kind of filter yields a much higher correlation peak, a better discrimination ability and a higher signal-to-noise ratio compared with the traditional circular harmonic filter.
Xuewen Chen andZenpei Chen
"Circular harmonic phase component for pattern recognition", Proc. SPIE 2321, Second International Conference on Optoelectronic Science and Engineering '94, (5 August 1994); https://doi.org/10.1117/12.182102
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Xuewen Chen, Zenpei Chen, "Circular harmonic phase component for pattern recognition," Proc. SPIE 2321, Second International Conference on Optoelectronic Science and Engineering '94, (5 August 1994); https://doi.org/10.1117/12.182102