Performance Evaluation of Optical Scanner Based on blue LED Structured Light

Bernal, Claudio; Agustina, Beatriz de; Marín, Marta María; Camacho, Ana María

doi:10.1016/j.proeng.2013.08.261

Cited by 30 publications

(16 citation statements)

References 6 publications

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“…The RMS of the discrepancies in the scans of the stone models showed greater errors than that of the impressions (Table 3). The errors resulted from reflection and scattering of light that may occur during scanning with blue LED scanner 13) . In this study, a rubber impression material (Aquasil Ultra, Dentsply) of the vinyl polysiloxane system was used to improve reliability of the measurements and the repeatability of the scans.…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional evaluation of the repeatability of scans of stone models and impressions using a blue LED scanner

et al. 2015

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In this study, we evaluated the repeatability of scans of stone models and impressions of abutment teeth using a blue LED scanner and compared the findings between different abutment teeth types. For the stone models as well as impression of the canines, premolars, and molars, we generated 10 color-difference-maps and reports for each tooth type (n=10 per tooth type). One-way analysis of variance (ANOVA) and independent t-tests were performed to evaluate the repeatability of scans of the stone models and impressions obtained from a blue LED scanner. Our results indicate a high repeatability of scans of stone models and impressions of abutment teeth using the blue LED scanner and suggest a possible clinical advantage for scanning impressions of different abutment teeth types.

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Section: Discussionmentioning

confidence: 99%

Three-dimensional evaluation of the repeatability of scans of stone models and impressions using a blue LED scanner

et al. 2015

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“…Scanner and bamboo motions were limited to reduce the effect of human factors during operation, which can affect the quality of the acquisition process. The workflow also considered that a single scan session was required to reduce noise and errors in the points acquired and therefore, increase the efficiency of the processing time [34]. The general set-up diagram is shown in Figure 4.…”

Section: Scanner Set-up and Processmentioning

confidence: 99%

Digital workflow for the accurate computation of the geometric properties of bamboo culms for structural applications

Lorenzo

Mimendi

2019

MATEC Web Conf.

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Bamboo is one of the most promising sustainable construction materials due to the large endemic natural reserves prevalent in the Southern Hemisphere. However, industrialised materials, such as concrete, steel and aluminium have overshadowed the application of natural bamboo culms, due to the high-quality assurance achieved over decades refining the production processes of structural elements manufactured from the former. As a result, the physical, geometric and mechanical properties of these industrialised structural elements are quantifiable, predictable and in agreement with international standards. This research presents the details of a digital workflow to quantify the inherent geometric variability of bamboo culms as part of a new quality assurance process for this natural structural element. This workflow relies on the use of a mid-range, commercially available structured-light 3D scanner to accurately capture a point cloud of the bamboo geometry and generate a corresponding polygon mesh. Digital models of three different bamboo species were validated through comparison with key physical measurements finding that the adoption of these digital models can significantly improve the accuracy and efficiency of manual methods due to the complex irregularities found in bamboo culms. This work demonstrates the benefits of adopting a non-destructive, reverse-engineering approach to quantify the geometric properties of bamboo compared to traditional tools and methods. Overall, this research shows the potential of digital technologies to support the adoption of this natural material allowing for the re-assessment of design workflows and providing an opportunity for bamboo to compete with industrialised materials.

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“…For this purpose, we used the Faro Focus 3D phase shifting laser scanner. Some important parameters of this scanner are the following :…”

Section: Concept Of Hierarchical Three‐dimensional Measurement Systemmentioning

confidence: 99%

Hierarchical, Three‐Dimensional Measurement System for Crime Scene Scanning

Adamczyk

Sitnik

Woźniak

2017

Journal of Forensic Sciences

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We present a new generation of three-dimensional (3D) measuring systems, developed for the process of crime scene documentation. This measuring system facilitates the preparation of more insightful, complete, and objective documentation for crime scenes. Our system reflects the actual requirements for hierarchical documentation, and it consists of three independent 3D scanners: a laser scanner for overall measurements, a situational structured light scanner for more minute measurements, and a detailed structured light scanner for the most detailed parts of tscene. Each scanner has its own spatial resolution, of 2.0, 0.3, and 0.05 mm, respectively. The results of interviews we have conducted with technicians indicate that our developed 3D measuring system has significant potential to become a useful tool for forensic technicians. To ensure the maximum compatibility of our measuring system with the standards that regulate the documentation process, we have also performed a metrological validation and designated the maximum permissible length measurement error E for each structured light scanner. In this study, we present additional results regarding documentation processes conducted during crime scene inspections and a training session.

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Performance Evaluation of Optical Scanner Based on blue LED Structured Light

Cited by 30 publications

References 6 publications

Three-dimensional evaluation of the repeatability of scans of stone models and impressions using a blue LED scanner

Three-dimensional evaluation of the repeatability of scans of stone models and impressions using a blue LED scanner

Digital workflow for the accurate computation of the geometric properties of bamboo culms for structural applications

Hierarchical, Three‐Dimensional Measurement System for Crime Scene Scanning

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