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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Reconstruction of Cylindrical Surfaces Using Digital Image Correlation

Full text
Author(s):
Berveglieri, Adilson [1] ; Tommaselli, Antonio M. G. [2]
Total Authors: 2
Affiliation:
[1] Sao Paulo State Univ UNESP, Dept Stat, BR-19060900 Presidente Prudente - Brazil
[2] Sao Paulo State Univ UNESP, Dept Cartog, BR-19060900 Presidente Prudente - Brazil
Total Affiliations: 2
Document type: Journal article
Source: SENSORS; v. 18, n. 12 DEC 2018.
Web of Science Citations: 0
Abstract

A technique for the reconstruction of cylindrical surfaces using optical images with an extension of least squares matching is presented. This technique is based on stereo-image acquisition of a cylindrical object, and it involves displacing the camera following the object length. The basic concept behind this technique is that variations in the camera viewpoint over a cylindrical object produce perspective effects similar to a conic section in an image sequence. Such parallax changes are continuous and can be modelled by a second-order function, which is combined with an adaptive least squares matching (ALSM) for the 3D object reconstruction. Using this concept, a photogrammetric intersection with only two image patches can be used to model a cylindrical object with high accuracy. Experiments were conducted with a cylinder on a panel with coded targets to assess the 3D reconstruction accuracy. The accuracy assessment was based on a comparison between the estimated diameter and the diameter directly measured over the cylinder. The difference between the diameters indicated an accuracy of 1/10 mm, and the cylindrical surface was entirely reconstructed. (AU)

FAPESP's process: 13/50426-4 - Unmanned airborne vehicle-based 4D remote sensing for mapping Rain Forest biodiversity and its change in Brazil (UAV_4D_Bio)
Grantee:Antonio Maria Garcia Tommaselli
Support Opportunities: Regular Research Grants
FAPESP's process: 14/05033-7 - Integrated Orientation of Hyperspectral Images Collected with UAV
Grantee:Adilson Berveglieri
Support Opportunities: Scholarships in Brazil - Post-Doctoral