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Proceedings Paper

Co-aligning aerial hyperspectral push-broom strips for change detection
Author(s): Erik Ringaby; Jörgen Ahlberg; Niclas Wadströmer; Per-Erik Forssén
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Paper Abstract

We have performed a field trial with an airborne push-broom hyperspectral sensor, making several flights over the same area and with known changes (e.g., moved vehicles) between the flights. Each flight results in a sequence of scan lines forming an image strip, and in order to detect changes between two flights, the two resulting image strips must be geometrically aligned and radiometrically corrected. The focus of this paper is the geometrical alignment, and we propose an image- and gyro-based method for geometric co-alignment (registration) of two image strips. The method is particularly useful when the sensor is not stabilized, thus reducing the need for expensive mechanical stabilization. The method works in several steps, including gyro-based rectification, global alignment using SIFT matching, and a local alignment using KLT tracking. Experimental results are shown but not quantified, as ground truth is, by the nature of the trial, lacking.

Paper Details

Date Published: 11 October 2010
PDF: 7 pages
Proc. SPIE 7835, Electro-Optical Remote Sensing, Photonic Technologies, and Applications IV, 78350Y (11 October 2010); doi: 10.1117/12.865034
Show Author Affiliations
Erik Ringaby, Linköping Univ. (Sweden)
Jörgen Ahlberg, Swedish Defence Research Agency (Sweden)
Niclas Wadströmer, Swedish Defence Research Agency (Sweden)
Per-Erik Forssén, Linköping Univ. (Sweden)


Published in SPIE Proceedings Vol. 7835:
Electro-Optical Remote Sensing, Photonic Technologies, and Applications IV
Gary W. Kamerman; Gary J. Bishop; John D. Gonglewski; Ove Steinvall; Keith L. Lewis; Richard C. Hollins; Thomas J. Merlet, Editor(s)

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