Reconstruction of Cylindrical Surfaces Using Digital Image Correlation

Autor(es)

Berveglieri, Adilson ^[1] ; Tommaselli, Antonio M. G. ^[2]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: SENSORS; v. 18, n. 12 DEC 2018.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 13/50426-4 - Unmanned airborne vehicle-based 4D remote sensing for mapping Rain Forest biodiversity and its change in Brazil (UAV_4D_Bio)
• Beneficiário: Antonio Maria Garcia Tommaselli
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/05033-7 - Orientação Integrada de Imagens Hiperespectrais Coletadas por VANT
• Beneficiário: Adilson Berveglieri
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado