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Proceedings Paper

A real-time processor for imaging through turbulence and other sub-optimal environments
Author(s): John A. Cochrane; Steve Collier; Nigel Mitchell; Jon Shadforth
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Paper Abstract

A real time processor package called IT4 is described, which has been developed to improve the quality of Imaging Through the 4 artefacts of sub-optimal surveillance (jitter, shimmer, contrast and noise). The package is able to operate on a wide range of video standards and can process imagery from the camera sensor directly or from previously recorded (movie file) sequences. The platform is currently a PC or a laptop but no other requirements such as special optics or camera hardware are necessary. IT4 removes both translational and rotational camera movement using a de-jitter algorithm and the image frames are analyzed to discriminate atmospheric shimmer from real image motion. The frames are then de-shimmered but any scene motion is accurately rendered. Sharpening and contrast options are available to the user to further improve visual quality and the contrast can be enhanced locally if so desired. IT4 improves fixed pattern noise in the image at all light levels and also reduces random noise, which is particularly useful during low light level image capture leading to better processing of both static and dynamic scenes.

Paper Details

Date Published: 30 October 2012
PDF: 6 pages
Proc. SPIE 8546, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence VIII, 85460M (30 October 2012); doi: 10.1117/12.966837
Show Author Affiliations
John A. Cochrane, Melford Resolution Ltd. (United Kingdom)
Steve Collier, Amber Optix Ltd. (United Kingdom)
Nigel Mitchell, Amber Optix Ltd. (United Kingdom)
Jon Shadforth, Amber Optix Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 8546:
Optics and Photonics for Counterterrorism, Crime Fighting, and Defence VIII
Colin Lewis; Douglas Burgess, Editor(s)

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