Generic Infrared System Model With Dynamic Image Generation

Robert I. Koda; Uri Bernstein; Catherine E. Todd

doi:10.1117/12.960752

20 September 1989 Generic Infrared System Model With Dynamic Image Generation

Robert I. Koda, Uri Bernstein, Catherine E. Todd

Proceedings Volume 1110, Imaging Infrared: Scene Simulation, Modeling, and Real Image Tracking; (1989) https://doi.org/10.1117/12.960752
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

A thermal imaging computer simulation was developed for use in design studies of airborne forward-looking infrared (FLIR) systems. This simulation dynamically generates in-flight imagery while modeling flight scenarios, thereby facilitating the evaluation of end-to-end system performance. Program flexibility, which was a major concern, is realized through a modular code design as well as user specification of all critical imager parameters, the scenario geometry, and flight characteristics. A standard type of faceted target model and a generic platform model are used. The simulation includes a nonuniform background, atmospheric path transmission and radiance, and additive noise, as well as system image degradation. Realistic optical and electronic characteristics are modeled using an equivalent Gaussian point spread function (PSF) in the image domain convolved with the spatially oversampled image. The oversampled image implementation uses spatial overlap techniques in place of standard "z-buffering" to ensure proper image plane irradiance distributions. The detector responses are computed by performing spectral radiance integrals across the detector bandpass, weighted by a user-defined specific detectivity. The resulting two-dimensional detector image may then be used to test target detection, recognition, and tracking algorithms. To improve computational efficiency, the relative platform-target geometry is considered so that time-consuming rotations and projections of the target data bases are performed only when physically relevant changes occur.

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Robert I. Koda, Uri Bernstein, and Catherine E. Todd "Generic Infrared System Model With Dynamic Image Generation", Proc. SPIE 1110, Imaging Infrared: Scene Simulation, Modeling, and Real Image Tracking, (20 September 1989); https://doi.org/10.1117/12.960752

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KEYWORDS

Sensors

Imaging systems

Detection and tracking algorithms

Infrared imaging

Thermal modeling

Infrared radiation

Thermography

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