Simultaneous reconstruction and calibration for multi-view structured light scanning

The multiview 3D data registration precision will decrease with the increasing number of registrations when measuring a large scale object using structured light scanning. In this paper, we propose a high-precision registration method based on multiple view geometry theory in order to solve this problem. First, a multiview network is constructed during the scanning process. The bundle adjustment method from digital close range photogrammetry is used to optimize the multiview network to obtain high-precision global control points. After that, the 3D data under each local coordinate of each scan are registered with the global control points. The method overcomes the error accumulation in the traditional registration process and reduces the time consumption of the following 3D data global optimization. The multiview 3D scan registration precision and efficiency are increased. Experiments verify the effectiveness of the proposed algorithm.

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Melite Civitas Romana in 3D: Virtualization Project of the Archaeological Park and Museum of the Domus Romana of Rabat, Malta

Open Archaeology ◽

10.1515/opar-2020-0126 ◽

2021 ◽

Vol 7 (1) ◽

pp. 51-83

Author(s):

Davide Tanasi ◽

Stephan Hassam ◽

Kaitlyn Kingsland ◽

Paolo Trapani ◽

Matthew King ◽

...

Keyword(s):

Laser Scanning ◽

Structured Light ◽

Terrestrial Laser Scanning ◽

Archaeological Site ◽

South Florida ◽

Virtual Museum ◽

Current State ◽

Structured Light Scanning ◽

The University ◽

Archaeological Excavations

Abstract The archaeological site of the Domus Romana in Rabat, Malta was excavated almost 100 years ago yielding artefacts from the various phases of the site. The Melite Civitas Romana project was designed to investigate the domus, which may have been the home of a Roman Senator, and its many phases of use. Pending planned archaeological excavations designed to investigate the various phases of the site, a team from the Institute for Digital Exploration from the University of South Florida carried out a digitization campaign in the summer of 2019 using terrestrial laser scanning and aerial digital photogrammetry to document the current state of the site to provide a baseline of documentation and plan the coming excavations. In parallel, structured light scanning and photogrammetry were used to digitize 128 artefacts in the museum of the Domus Romana to aid in off-site research and create a virtual museum platform for global dissemination.

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A COMPARISON OF STRUCTURED LIGHT SCANNING AND PHOTOGRAMMETRY FOR THE DIGITISATION OF PHYSICAL PROTOTYPES

Proceedings of the Design Society ◽

10.1017/pds.2021.2 ◽

2021 ◽

Vol 1 ◽

pp. 11-20

Author(s):

Owen Freeman Gebler ◽

Mark Goudswaard ◽

Ben Hicks ◽

David Jones ◽

Aydin Nassehi ◽

...

Keyword(s):

Early Stage ◽

Structured Light ◽

Superior Performance ◽

Specific Design ◽

Model Quality ◽

Stage Design ◽

Design Changes ◽

Structured Light Scanning ◽

Early Stage Design

AbstractPhysical prototyping during early stage design typically represents an iterative process. Commonly, a single prototype will be used throughout the process, with its form being modified as the design evolves. If the form of the prototype is not captured as each iteration occurs understanding how specific design changes impact upon the satisfaction of requirements is challenging, particularly retrospectively.In this paper two different systems for digitising physical artefacts, structured light scanning (SLS) and photogrammetry (PG), are investigated as means for capturing iterations of physical prototypes. First, a series of test artefacts are presented and procedures for operating each system are developed. Next, artefacts are digitised using both SLS and PG and resulting models are compared against a master model of each artefact. Results indicate that both systems are able to reconstruct the majority of each artefact's geometry within 0.1mm of the master, however, overall SLS demonstrated superior performance, both in terms of completion time and model quality. Additionally, the quality of PG models was far more influenced by the effort and expertise of the user compared to SLS.

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Accuracy and precision of a structured light scanning system for acquiring 3D information of the breast under compression

Medical Imaging 2021: Physics of Medical Imaging ◽

10.1117/12.2581913 ◽

2021 ◽

Author(s):

Floor Schampers ◽

Marta Bravo de Moreira Pinto ◽

Koen Michielsen

Keyword(s):

Structured Light ◽

Scanning System ◽

Accuracy And Precision ◽

Structured Light Scanning ◽

3D Information

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A rail wear measurement method based on structured light scanning

10.1117/12.2266469 ◽

2017 ◽

Author(s):

Peng Chen ◽

Peijun Wang ◽

Martin Lauer ◽

Xiaomin Tang ◽

Jindong Wang

Keyword(s):

Measurement Method ◽

Structured Light ◽

Rail Wear ◽

Wear Measurement ◽

Structured Light Scanning

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Structured light scanning to evaluate three-dimensional anthropometry in HIV facial lipoatrophy

Surgical Techniques Development ◽

10.4081/std.2011.e30 ◽

2011 ◽

Vol 1 (2) ◽

pp. 30 ◽

Cited By ~ 1

Author(s):

Purificación Gacto-Sánchez ◽

Fernando Lobo-Bailón ◽

Cristina Suárez ◽

Tomás Gómez- Cía

Keyword(s):

White Light ◽

Structured Light ◽

Surface Scanning ◽

The Real ◽

Mean Error ◽

Error Margin ◽

Human Models ◽

Structured Light Scanning ◽

Facial Lipoatrophy ◽

Landmark Localization

The psychological and social impact of the lipodystrophy syndrome on HIV-infected individuals may be quite considerable and adversely affect their quality of life. Currently no validated assessment tool for facial lipoatrophy is available. The main objective of this paper is to evaluate the reliability of interactive anthropometric landmark localization based on digitized 3D facial images. By comparing both computed tomography (CT) and structured light scanning we try to demonstrate that surface scanning shows a higher sensitivity in measuring facial reference points. Besides, we evaluate the reproducibility of facial 3D white-light scans. Three HIVpositive men attending our plastic surgery outpatient clinic for treatment of facial lipodystrophy were enrolled in the study. Localization of anthropometric landmarks measurements was performed on the patients. All patients underwent a facial CT and a facial white-light scanning on the same day. The inter-landmark distances measured on facial models developed from CT aided with VirSSPA 3D software and structured light scanning were compared to the real human models. We found that facial distances measured in the CT 3D reconstruction showed a mean error margin of 0.357 cm from the real distances measured on patients. On the contrary, mean error margin with the white-light scanning was of 0.096 cm. In both cases, measurements were found to be statistically significant (P<0.05). When compared to CT reconstructions, white-light surface scanning offers a more accurate landmark localization as well as reliable reconstructions of up to less than the tenth of a millimetre as average when compared to real measurements on facial human models.

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