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Title: Establishing the performance of low-cost Lytro cameras for 3D coordinate geometry measurements
Authors: Rangappa, Shreedhar
Matharu, Ranveer S.
Petzing, Jon N.
Kinnell, Peter
Keywords: Lytro camera
Plenoptic camera
Depth values
Response curve
Machine vision
Coordinate geometry
Issue Date: 2019
Publisher: Springer © The Authors
Citation: RANGAPPA, S. ... et al, 2019. Establishing the performance of low-cost Lytro cameras for 3D coordinate geometry measurements. Machine Vision and Applications, doi:10.1007/s00138-019-01013-z.
Abstract: Lytro cameras are equipped to capture 3D information in one exposure without the need for structured illumination, allowing greyscale depth maps of the captured image to be created using the Lytro desktop software. These consumer-grade light-field cameras (Lytro) provide a cost-effective method of measuring the depth of multiple objects which is suitable for many applications. But, the greyscale depth maps generated using the Lytro cameras are in relative depth scale and hence not suitable for engineering applications where absolute depth is essential. In this research, camera control variables, environmental sensitivity, depth distortion characteristics, and the effective working range of first- and second-generation Lytro cameras were evaluated. In addition, a depth measuring technique to deliver 3D output depth maps represented in SI units (metres) is discussed in detail exhibiting the suitability of consumer-grade Lytro cameras suitability in metrological applications without significant modifications.
Description: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Sponsor: This research work is supported under Grant Reference Number EP/IO33467/1 and the support of Rolls-Royce plc.
Version: Published
DOI: 10.1007/s00138-019-01013-z
URI: https://dspace.lboro.ac.uk/2134/37463
Publisher Link: https://doi.org/10.1007/s00138-019-01013-z
ISSN: 0932-8092
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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