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Towards Dynamic Camera Calibration for Constrained Flexible Mirror Imaging

Abstract : Flexible mirror imaging systems consisting of a perspective camera viewing a scene reflected in a flexible mirror can provide direct control over image field-of-view and resolution. However, calibration of such systems is difficult due to the vast range of possible mirror shapes and the flexible nature of the system. This paper proposes the fundamentals of a dynamic calibration approach for flexible mirror imaging systems by examining the constrained case of single dimensional flexing. The calibration process consists of an initial primary calibration stage followed by in-service dynamic calibration. Dynamic calibration uses a linear approximation to initialise a non-linear minimisation step, the result of which is the estimate of the mirror surface shape. The method is easier to implement than existing calibration methods for flexible mirror imagers, requiring only two images of a calibration grid for each dynamic calibration update. Experimental results with both simulated and real data are presented that demonstrate the capabilities of the proposed approach.
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https://hal.inria.fr/inria-00325391
Contributor : Peter Sturm <>
Submitted on : Monday, September 29, 2008 - 10:58:48 AM
Last modification on : Monday, September 29, 2008 - 11:01:31 AM
Long-term archiving on: : Monday, October 8, 2012 - 1:40:29 PM

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Aubrey K. Dunne, John Mallon, Paul F. Whelan. Towards Dynamic Camera Calibration for Constrained Flexible Mirror Imaging. The 8th Workshop on Omnidirectional Vision, Camera Networks and Non-classical Cameras - OMNIVIS, Rahul Swaminathan and Vincenzo Caglioti and Antonis Argyros, Oct 2008, Marseille, France. ⟨inria-00325391⟩

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