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9 November 1977 Background Clutter Leakage Estimation In A Mosaic Sensor Whose Field Of View Moves Relative To The Background
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Abstract
This paper examines the basic equation for clutter leakage in an optical system and discusses approximation techniques for rapid estimation of noise-equivalent target as a function of background PSD, optical system parameters, range and rate of motion of the sensor FOV relative to the background. Approximations which were developed for the conventional single-break-point PSD with a slope of -12 dB/octave, with a system using frame-to-frame differencing over an extended range of FOV motion rate are included as an appendix. A new method is derived, valid for low rates of FOV motion and a more general PSD, which can be approximated by a broken-line Bode plot. This method is extended to cover Nth order frame differencing and two-dimensional FOV motion, with the background viewed from a direction other than perpendicular to the surface. Given a specific optical system observing a specific background with any typical PSD, clutter leakage will display a dependence on FOV motion rate proportional to VN, where V is the motion rate, and N is the order of frame-differencing used for clutter rejection. This result is independent of the shape of the PSD curve for usual PSD's and system parameters.
© (1977) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. L. Rapier "Background Clutter Leakage Estimation In A Mosaic Sensor Whose Field Of View Moves Relative To The Background", Proc. SPIE 0124, Modern Utilization of Infrared Technology III, (9 November 1977); https://doi.org/10.1117/12.955837
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