Title:	POLAR MOTION STATION-WEBCAM CALIBRATION FOR SOLAR TRACKING
Author(s):	Miguel Romero, Rafael Lemuz, Carlos Guillén, Cesar Bautista, Irene Ayaquica, Daniel Valdés
ISBN:	978-972-8939-48-9
Editors:	Yingcai Xiao
Year:	2011
Edition:	Single
Keywords:	Solar tracking, motion station-camera calibration, surface fitting
Type:	Short Paper
First Page:	287
Last Page:	291
Language:	English
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Paper Abstract:	In this work we propose a calibration algorithm for a high precision solar tracking system. The main goal of the proposed system is to automatically direct a motion stage that continuously capture solar images where the sun appears in the center of the image. A calibration algorithm is proposed to accurately model the transformation from pixel displacements viewed by the camera to the angular parameters of the motion stage. A low cost solar tracking platform integrating a polar motion stage and a webcam is used to assess the accuracy of the proposed algorithm. Results are presented to show the feasibility of our approach to circumvent camera lens distortion and mechanical instabilities of the low cost tracking system.
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