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7 July 2000 Dim point target detection in IR imagery using multistage IIR filter
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Temporal profiles of point-like dim targets and the extended cloud pixels provide useful information in detecting the target. Among the recent methods that utilize temporal profile of pixel in detecting point target are Triple Temporal Filter (TTF) and Continuous Wavelet Transform (CWT). TTF uses two damped sinusoidal filters, an exponential averaging filter with six appropriate coefficients to deal with different aspects of clutter. TTF is recursive and efficient in detecting point targets without applying any threshold techniques. The performance of CWT is comparable to TTF but all the frames in a sequence need to be stored. Therefore it is computationally complex algorithm.
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Eng Thiam Lim, Suyog D. Deshpande, Choong Wah Chan, and Ronda Venkateswarlu "Dim point target detection in IR imagery using multistage IIR filter", Proc. SPIE 4025, Acquisition, Tracking, and Pointing XIV, (7 July 2000);

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