On the focusing of thermal images

Authors:
Marcos Faundez-Zanuy;Jiří Mekyska;Virginia Espinosa-Duró
Affiliations:
EUP Mataró, Tecnocampus, 08302 Mataro, Barcelona, Spain;Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology, Purkynova 118, 612 00 Brno, Czech Republic;EUP Mataró, Tecnocampus, 08302 Mataro, Barcelona, Spain
Venue:
Pattern Recognition Letters
Year:
2011

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Abstract

In this paper we present a new thermographic image database, suitable for the analysis of automatic focusing measures. This database contains the images of 10 scenes, each of which is represented once for each of 96 different focus positions. Using this database, we evaluate the usefulness of five focus measures with the goal of determining the optimal focus position. Experimental results reveal that the accurate automatic detection of optimal focus position can be achieved with a low computational burden. We also present an acquisition tool for obtaining thermal images. To the best of our knowledge, this is the first study on the automatic focusing of thermal images.