8 August 2003 Multi-image registration for an enhanced vision system
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Proceedings Volume 5108, Visual Information Processing XII; (2003); doi: 10.1117/12.496917
Event: AeroSense 2003, 2003, Orlando, Florida, United States
Abstract
An Enhanced Vision System (EVS) utilizing multi-sensor image fusion is currently under development at the NASA Langley Research Center. The EVS will provide enhanced images of the flight environment to assist pilots in poor visibility conditions. Multi-spectral images obtained from a short wave infrared (SWIR), a long wave infrared (LWIR), and a color visible band CCD camera, are enhanced and fused using the Retinex algorithm. The images from the different sensors do not have a uniform data structure: the three sensors not only operate at different wavelengths, but they also have different spatial resolutions, optical fields of view (FOV), and bore-sighting inaccuracies. Thus, in order to perform image fusion, the images must first be co-registered. Image registration is the task of aligning images taken at different times, from different sensors, or from different viewpoints, so that all corresponding points in the images match. In this paper, we present two methods for registering multiple multi-spectral images. The first method performs registration using sensor specifications to match the FOVs and resolutions directly through image resampling. In the second method, registration is obtained through geometric correction based on a spatial transformation defined by user selected control points and regression analysis.
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Glenn D. Hines, Zia-ur Rahman, Daniel J. Jobson, Glenn A. Woodell, "Multi-image registration for an enhanced vision system", Proc. SPIE 5108, Visual Information Processing XII, (8 August 2003); doi: 10.1117/12.496917; https://doi.org/10.1117/12.496917
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KEYWORDS
Image sensors

Long wavelength infrared

Image registration

Short wave infrared radiation

Sensors

Cameras

Image fusion

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