Fast Risley prisms camera steering system: calibration and image distortions correction through the use of a three-dimensional refraction model

Valérie Lavigne; Benoit Ricard

doi:10.1117/1.2722754

1 April 2007 Fast Risley prisms camera steering system: calibration and image distortions correction through the use of a three-dimensional refraction model

Valérie Lavigne, Benoit Ricard

Author Affiliations +

Optical Engineering, Vol. 46, Issue 4, 043201 (April 2007). https://doi.org/10.1117/1.2722754

Abstract

To improve airborne search and rescue operations and the general aerial surveillance efficiency, new concepts of multiple field-of-view and variable-resolution imagers have been developed. These imagers provide surveillance operators with simultaneous wide area coverage and high-resolution imaging. Over the last years, several optical steering systems have been developed and field tested in operational conditions. These developments helped us to develop a novel camera steering system using achromatic Risley prisms. This simple and sturdy steering system allowed us to move rapidly and precisely the field of view of an infrared camera. To improve its performance, a three-dimensional (3D) refraction model was applied to enable fast pointing direction calibration and correction of distorted images. Image deformations were analyzed, and a fast linear image correction based on homographic transformation and the 3D refraction model are presented. Experimental results of mosaicking applications with real imaging systems in the 3- to 5-μm, 8- to 12-μm infrared, and 850- to 860-nm visible bands demonstrate the improvements achieved with the homographic image distortions correction and the fast pointing calibration procedure.

©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Valérie Lavigne and Benoit Ricard "Fast Risley prisms camera steering system: calibration and image distortions correction through the use of a three-dimensional refraction model," Optical Engineering 46(4), 043201 (1 April 2007). https://doi.org/10.1117/1.2722754

Published: 1 April 2007

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available