Real-time rotation-invariant circular-harmonic wavelet-matched filters using the coupled mode liquid crystal television (LCTV)

Lixin Shen; Yunlong Sheng

doi:10.1117/12.205772

28 March 1995 Real-time rotation invariant circular harmonic wavelet-matched filters using the coupled mode liquid crystal television (LCTV)

Lixin Shen, Yunlong Sheng

Author Affiliations +

Proceedings Volume 2490, Optical Pattern Recognition VI; (1995) https://doi.org/10.1117/12.205772
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

We introduce the circular harmonic wavelet matched filter, that uses the wavelet transform in improve the performance of the rotation invariant circular harmonic filters in terms of the peak sharpness and the robustness to noise. In the optical implementation, the wavelet bandpass filter guarantees the full range rotation invariance of the filter by eliminating the circular subsampling error.

Citation Download Citation

Lixin Shen and Yunlong Sheng "Real-time rotation invariant circular harmonic wavelet-matched filters using the coupled mode liquid crystal television (LCTV)", Proc. SPIE 2490, Optical Pattern Recognition VI, (28 March 1995); https://doi.org/10.1117/12.205772

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