Automated inspection of gaps on the automobile production line through stereo vision and specular reflection

Kosmopoulos, D; Varvarigou, T

dc.contributor.author	Kosmopoulos, D	en
dc.contributor.author	Varvarigou, T	en
dc.date.accessioned	2014-03-01T01:16:11Z
dc.date.available	2014-03-01T01:16:11Z
dc.date.issued	2001	en
dc.identifier.issn	0166-3615	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13965
dc.subject	Automated visual inspection	en
dc.subject	Gap measurement	en
dc.subject	Specular reflection	en
dc.subject.classification	Computer Science, Interdisciplinary Applications	en
dc.subject.other	Automation	en
dc.subject.other	Computer vision	en
dc.subject.other	Infrared devices	en
dc.subject.other	Laser applications	en
dc.subject.other	Light emitting diodes	en
dc.subject.other	Stereo vision	en
dc.subject.other	Structural panels	en
dc.subject.other	Automated visual inspection	en
dc.subject.other	Specular reflection	en
dc.subject.other	Automobile manufacture	en
dc.title	Automated inspection of gaps on the automobile production line through stereo vision and specular reflection	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0166-3615(01)00113-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0166-3615(01)00113-0	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	One of the most difficult tasks in the later stages of automobile assembly is the dimensional inspection of the gaps between the car body and the various panels fitted on it (doors, motor-hood, etc.). The employment of an automatic gap-measuring system would reduce the costs significantly and would offer high flexibility. However, this task is still performed by humans and only a few - still experimental - automatic systems have been reported. In this paper, we introduce a system for automated gap inspection that employs computer vision. It is capable of measuring the lateral and the range dimension of the gap (width and flush, correspondingly). The measurement installation consists of two calibrated stereo cameras and two infrared LED lamps, used for highlighting the edges of the gap through specular reflection. The gap is measured as the 3D distance between the highlighted edges. This method has significant advantages against the laser-based, gap-measuring systems, mainly due to its color independency. Our approach has been analytically described in 2D and extensively evaluated using synthetic as well as real gaps. The results obtained verify its robustness and its applicability in an industrial environment. (C) 2001 Published by Elsevier Science B.V.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Computers in Industry	en
dc.identifier.doi	10.1016/S0166-3615(01)00113-0	en
dc.identifier.isi	ISI:000170828400004	en
dc.identifier.volume	46	en
dc.identifier.issue	1	en
dc.identifier.spage	49	en
dc.identifier.epage	63	en