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Corner-Based Geometric Calibration of Multi-focus Plenoptic Cameras

Nousias, S; Chadebecq, F; Pichat, J; Keane, P; Ourselin, S; Bergeles, C; (2017) Corner-Based Geometric Calibration of Multi-focus Plenoptic Cameras. In: Proceedings of the 2017 IEEE International Conference on Computer Vision (ICCV). (pp. pp. 957-965). IEEE: Venice, Italy. Green open access

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Abstract

We propose a method for geometric calibration of multi-focus plenoptic cameras using raw images. Multi-focus plenoptic cameras feature several types of micro-lenses spatially aligned in front of the camera sensor to generate micro-images at different magnifications. This multi-lens arrangement provides computational-photography benefits but complicates calibration. Our methodology achieves the detection of the type of micro-lenses, the retrieval of their spatial arrangement, and the estimation of intrinsic and extrinsic camera parameters therefore fully characterising this specialised camera class. Motivated from classic pinhole camera calibration, our algorithm operates on a checker-board's corners, retrieved by a custom micro-image corner detector. This approach enables the introduction of a reprojection error that is used in a minimisation framework. Our algorithm compares favourably to the state-of-the-art, as demonstrated by controlled and freehand experiments, making it a first step towards accurate 3D reconstruction and Structure-from-Motion.

Type: Proceedings paper
Title: Corner-Based Geometric Calibration of Multi-focus Plenoptic Cameras
Event: 2017 IEEE International Conference on Computer Vision (ICCV)
ISBN-13: 978-1-5386-1032-9
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ICCV.2017.109
Publisher version: https://doi.org/10.1109/ICCV.2017.109
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Cameras, Calibration, Two dimensional displays, Three-dimensional displays, Detectors, Lenses
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Ophthalmology
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/10034068
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