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  • A circular harmonic quantized amplitude compensated matched filter 

    Zhang, Hui; Wang, Zhao-Qi; Cartwright, Colin M.; Ding, Mei-Song; Cook, Nick J.; Gillespie, W. Allan (Elsevier, 1998)
    The circular harmonic expansion technique has been applied to the quantized amplitude-compensated matched filter for rotation-invariant recognition. The filter is an amplitude filter with three discrete grey levels. The ...