Document Type
Article
Language
eng
Publication Date
2003
Publisher
Optical Society of America
Source Publication
Applied Optics
Source ISSN
1045-9219
Abstract
What is to our knowledge a new scene-based algorithm for nonuniformity correction in infrared focal-plane array sensors has been developed. The technique is based on the inverse covariance form of the Kalman filter (KF), which has been reported previously and used in estimating the gain and bias of each detector in the array from scene data. The gain and the bias of each detector in the focal-plane array are assumed constant within a given sequence of frames, corresponding to a certain time and operational conditions, but they are allowed to randomly drift from one sequence to another following a discrete-time Gauss-Markov process. The inverse covariance form filter estimates the gain and the bias of each detector in the focal-plane array and optimally updates them as they drift in time. The estimation is performed with considerably higher computational efficiency than the equivalent KF. The ability of the algorithm in compensating for fixed-pattern noise in infrared imagery and in reducing the computational complexity is demonstrated by use of both simulated and real data.
Recommended Citation
Torres, Sergio N.; Pezoa, Jorge E.; and Hayat, Majeed M., "Scene-based nonuniformity correction for focal plane arrays by the method of the inverse covariance form" (2003). Electrical and Computer Engineering Faculty Research and Publications. 550.
https://epublications.marquette.edu/electric_fac/550
ADA Accessible Version
Comments
Accepted version. Applied Optics, Vol. 42, No. 29 (2003): 5872-5881. DOI. © 2003 Optical Society of America. Used with permission.
Majeed M. Hayat was affiliated with University of New Mexico, Albuquerque at the time of publication.