Interests of refocused images calibrated in depth with a multi-view camera for control by vision

Cécile Riou; Bruno Colicchio; Jean-Philippe Lauffenburger; Christophe Cudel

doi:10.1117/12.2264237

14 May 2017 Interests of refocused images calibrated in depth with a multi-view camera for control by vision

Cécile Riou, Bruno Colicchio, Jean-Philippe Lauffenburger, Christophe Cudel

Proceedings Volume 10338, Thirteenth International Conference on Quality Control by Artificial Vision 2017; 1033807 (2017) https://doi.org/10.1117/12.2264237
Event: The International Conference on Quality Control by Artificial Vision 2017, 2017, Tokyo, Japan

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.

Citation Download Citation

Cécile Riou, Bruno Colicchio, Jean-Philippe Lauffenburger, and Christophe Cudel "Interests of refocused images calibrated in depth with a multi-view camera for control by vision", Proc. SPIE 10338, Thirteenth International Conference on Quality Control by Artificial Vision 2017, 1033807 (14 May 2017); https://doi.org/10.1117/12.2264237

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