Measurement extraction of two targets with unequal intensities in a FPA

Andrew Finelli; Yaakov Bar-Shalom; Peter Willett; B. Milgrom; R. Ben-Dov

doi:10.1117/12.2559503

22 April 2020 Measurement extraction of two targets with unequal intensities in a FPA

Andrew Finelli, Yaakov Bar-Shalom, Peter Willett, B. Milgrom, R. Ben-Dov

Proceedings Volume 11423, Signal Processing, Sensor/Information Fusion, and Target Recognition XXIX; 1142306 (2020) https://doi.org/10.1117/12.2559503
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

This paper concerns measurement extraction for targets in electro-optical (EO) sensors. The goal is to be able to estimate the location and intensities of two targets in a focal plane array (FPA). Work has been done previously on extracting single targets, as well as two targets of equal intensity. The current work extends this to two targets with unequal and unknown intensities. We consider point targets that deposit energy in the FPA according to a Gaussian point spread function (PSF) with parameter σPSF . The measurement extraction for the targets is performed using a Maximum Likelihood method using two different models: a two target model for resolved targets, and a one target centroid model for unresolved targets. We present the Cramer-Rao Lower Bound (CRLB) on estimation accuracy for both models and provide simulations that confirm of our method’s efficiency (i.e., that this lower bound is achieved). Our results show that a target separation of about 1:15σPSF is needed for efficient extraction.

Conference Presentation

Citation Download Citation

Andrew Finelli, Yaakov Bar-Shalom, Peter Willett, B. Milgrom, and R. Ben-Dov "Measurement extraction of two targets with unequal intensities in a FPA", Proc. SPIE 11423, Signal Processing, Sensor/Information Fusion, and Target Recognition XXIX, 1142306 (22 April 2020); https://doi.org/10.1117/12.2559503

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