Maximum a-posteriori estimation of detector array non-uniformity and shift in sequences of short exposure images

David C. Dayton; John D. Gonglewski; Chad St. Arnauld

doi:10.1117/12.737106

26 September 2007 Maximum a-posteriori estimation of detector array non-uniformity and shift in sequences of short exposure images

David C. Dayton, John D. Gonglewski, Chad St. Arnauld

Author Affiliations +

Proceedings Volume 6712, Unconventional Imaging III; 67120I (2007) https://doi.org/10.1117/12.737106
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

Most non-conventional approaches to image restoration of scenes observed over long atmospheric slant paths require multiple frames of short exposure images taken with low noise focal plane arrays. The individual pixels in these arrays often exhibit spatial non-uniformity in their response. In addition base motion jitter in the observing platform introduces a frame-to-frame linear shift that must be compensated for in order for the multi-frame restoration to be successful. In this paper we describe a maximum aposteriori parameter estimation approach to the simultaneous estimation of the frame-to-frame shifts and the array non-uniformity. This approach can be incorporated into an iterative algorithm and implemented in real time as the image data is being collected. We present a brief derivation of the algorithm as well as its application to actual image data collected from an airborne platform.

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David C. Dayton, John D. Gonglewski, and Chad St. Arnauld "Maximum a-posteriori estimation of detector array non-uniformity and shift in sequences of short exposure images", Proc. SPIE 6712, Unconventional Imaging III, 67120I (26 September 2007); https://doi.org/10.1117/12.737106

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