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3 May 2012 Shape-based topologies for real-time onboard image generation
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The field steerable mirror (FSM) Infrared camera system used in Persistent Surveillance Systems provides wide area coverage using smaller number of cameras. The mirror locations float in a-priori known manner through the field of view and is supposed to be stitched together using image features. This is because the platform motion between mirror positions makes it difficult to exploit a-prior knowledge of the mirror positions. The mosaic generation mechanism developed at ITT Exelis utilizes a calibration step which uses elementary shapes that are joined continuously to create complex topologies that capture platform movement. This shape topology process can be extended to other platforms and systems. This paper presents the process by which the meta-data is used in the calibration step that will ultimately allow for real-time Infrared image mosaic generation. By using the geographic coordinates, found in the image meta-data, we are able to estimate the amount of overlap between any two images to be stitched, preventing the need for unnecessary and expensive image feature extraction and matching. This is achieved by using a polygon clipping approach to determine the vertex coordinates of the captured images in order to estimate overlap and disconnection in the field of view.
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Allison Bright, Omid Kia, Justin Graybill, and Sol Cruz "Shape-based topologies for real-time onboard image generation", Proc. SPIE 8360, Airborne Intelligence, Surveillance, Reconnaissance (ISR) Systems and Applications IX, 83600C (3 May 2012);

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