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An illumination device for the acquisition of image series under variable illumination directions

: Gruna, R.

Beyerer, J.; Huber, M.:
Joint Workshop of Fraunhofer IOSB and Institute for Anthropomatics, Vision and Fusion Laboratory 2010. Proceedings : Was held in La Bresse, France, from July 19 to July 23, 2010
Karlsruhe: KIT Scientific Publishing, 2011 (Karlsruher Schriften zur Anthropomatik 7)
ISBN: 978-3-86644-609-0
Fraunhofer-Institut für Optronik, Systemtechnik und Bildauswertung and Institute for Anthropomatics, Vision and Fusion Laboratory (Joint Workshop) <2010, La Bresse>
Conference Paper
Fraunhofer IOSB ()

Analyzing scenes under variable illumination has been an important and widely studied research area in the field of computer vision. In this technical report, we present an illumination device for capturing image series of small objects under variable illumination directions. Due to using a digital projector as programmable light source and a parabolic reflector to reflect the emitted illumination patterns, the device dispenses with the need of moving parts. Furthermore, we demonstrate the utility of illumination series for unsupervised surface defect detection by applying statistical anomaly detection to the obtained reflectance data.