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Proceedings Paper

Interests of refocused images calibrated in depth with a multi-view camera for control by vision
Author(s): Cécile Riou; Bruno Colicchio; Jean-Philippe Lauffenburger; Christophe Cudel
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Paper Abstract

This work shows the interests of the refocusing technics in the domain of industrial vision. A prototype of light field camera is used for computing refocused images, which are calibrated in depth. These images are computed with a method previously presented, using a multi-view camera modeled following the “variable homography” principles. The camera prototype is composed by 4 mini-lenses placed behind a single CCD sensor, calibrated and able to perform 3D measurements. As the device is calibrated in depth, we link refocused images to a selected depth. Contrary to the conventional imaging, with refocused depth calibrated images, it is possible to highlight planes of interest to facilitate vision inspection. Objects can be distinguished from others according to their depths. We also show that a pixel metric scale can be estimated at different depths, avoiding the use of other measurement devices. Two standard vision examples are presented to illustrate the interests of this approach.

Paper Details

Date Published: 14 May 2017
PDF: 8 pages
Proc. SPIE 10338, Thirteenth International Conference on Quality Control by Artificial Vision 2017, 1033807 (14 May 2017); doi: 10.1117/12.2264237
Show Author Affiliations
Cécile Riou, Univ. de Haute Alsace (France)
Bruno Colicchio, Univ. de Haute Alsace (France)
Jean-Philippe Lauffenburger, Univ. de Haute Alsace (France)
Christophe Cudel, Univ. de Haute Alsace (France)

Published in SPIE Proceedings Vol. 10338:
Thirteenth International Conference on Quality Control by Artificial Vision 2017
Hajime Nagahara; Kazunori Umeda; Atsushi Yamashita, Editor(s)

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