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Light Field Illumination. A Universal Lighting Approach for Visual Inspection

: Kludt, Christian; Dippon, Lukas; Längle, Thomas; Beyerer, Jürgen

Fulltext urn:nbn:de:0011-n-6088535 (557 KByte PDF)
MD5 Fingerprint: dd1114baae7c0205a24137576968cc0f
Created on: 21.11.2020

Heizmann, Michael (Hrsg.); Längle, Thomas (Hrsg.):
Forum Bildverarbeitung 2020 : 26. und 27. November 2020, Karlsruhe, Online-Konferenz
Karlsruhe: KIT Scientific Publishing, 2020
ISBN: 978-3-7315-1053-6
DOI: 10.5445/KSP/1000124383
Forum Bildverarbeitung <2020, Online>
Conference Paper, Electronic Publication
Fraunhofer IOSB ()
light field; visual inspection; programmable lighting; projection calibration; phase-shifting; light field rendering

Choosing a proper lighting approach is a crucial task in designing visual inspection systems. It becomes especially challenging for complex-shaped objects, which change the direction and distribution of incoming light in various ways. We overcome this challenge by constructing a light field display and deploy it as a highly tunable lighting device. By programmatically controlling the spatial position of the individual light sources while simultaneously controlling their angular direction of emission, an object-specific light field can be generated, which highlights the features of the object under test with maximum contrast. We explain the calibration procedure, the rendering pipeline and present first results of the device’s performance.