Analytical range performance models like NVThermIP and TRM have proved very useful in the development,
procurement, and quality control of thermal imaging systems. The analytical approach, however, cannot produce images
usable for the visualization of expected capabilities of a planned system or suitable for observer experiments. In order to
overcome this limitation, a software package, pcSitoS, was developed at FGAN-FOM that implements most of the
features covered by the analytical modeling package TRM but is capable of producing simulated high-quality output
images for a given IR system. The simulation model is presented and examples of simulated imagery from both scanning
and staring thermal imaging systems are shown.
In this paper the IR-scene generation method is presented as developed at FGAN-FIM 'Research Institute for Information Processing and Pattern Recognition.' The main task of the generation is the calculation of images approximating the view of a real (or future) IR-imager. The generator is implemented in software and is not intended for creating images in real- time. The modeling of natural backgrounds, vehicles and man- made objects is shown, and short description of the methods used for the scene composition is given. Scene dynamics is introduced by camera and/or target movements under use control. The output of the IR-scene generator is an animated image sequence. The principal advantage of an IR-simulation system is the creation of reproducible and accurate image data. Hence the evaluation and assessment of image analyzing systems (e.g. seekerhead or tracker) can be simplified. Moreover the analyzing system may acquire complete control over the image generation and new images (with well known viewing conditions) can be calculated on request.
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