Combination of Air- and Water-Calibration for a Fringe Projection Based Underwater 3D-Scanner

2015 ◽  
pp. 49-60 ◽  
Author(s):  
Christian Bräuer-Burchardt ◽  
Peter Kühmstedt ◽  
Gunther Notni
Keyword(s):  
Fringe Projection ◽  
3D Scanner

Shape Investigation of Worn Cutting Inserts with Utilization of Active Triangulation

2013 ◽  
Vol 581 ◽  
pp. 22-25 ◽  
Author(s):  
Ladislav Morovič ◽  
Juraj Vagovský ◽  
Ivan Buranský
Keyword(s):  
Measurement Method ◽  
3D Model ◽  
Fringe Projection ◽  
3D Scanner ◽  
Measuring Device ◽  
Geometrical Properties ◽  
Cutting Insert ◽  
Cutting Inserts ◽  
Different Shapes ◽  
Active Triangulation

The paper deals with utilization of active triangulation method for shape investigation of cutting inserts after wear. For measuring of cutting insert shape a method using the structured light (fringe projection) was used. As a measuring device the optical 3D scanner GOM ATOS II TripleScan SO was used. Cutting inserts with different shapes was measured. With the measurement method mentioned in the paper the accurate shape of the cutting insert can be captured. From the 3D model moreover it is possible to measure the geometrical properties as well as tool wear, plastical deformation, build-up-edge, corner damage and chipping of cutting insert.

scholarly journals COMPACT HANDHELD FRINGE PROJECTION BASED UNDERWATER 3D-SCANNER

2015 ◽  
Vol XL-5/W5 ◽  
pp. 33-39 ◽  
Author(s):  
C. Bräuer-Burchardt ◽  
M. Heinze ◽  
I. Schmidt ◽  
P. Kühmstedt ◽  
G. Notni
Keyword(s):  
Plane Surface ◽  
Geometric Model ◽  
Measurement Data ◽  
Fringe Projection ◽  
Structured Illumination ◽  
3D Scanner ◽  
Recording Time ◽  
Measurement Results ◽  
Graphical Presentation

A new, fringe projection based compact handheld 3D scanner for the surface reconstruction of measurement objects under water is introduced. The weight of the scanner is about 10 kg and can be used in a water depth of maximal 40 metres. A measurement field of about 250 mm x 200 mm is covered under water, and the lateral resolution of the measured object points is about 150 μm. Larger measurement objects can be digitized in a unique geometric model by merging subsequently recorded datasets. The recording time for one 3D scan is a third of a second. The projection unit for the structured illumination of the scene as well as the computer for device control and measurement data analysis are included into the scanners housing. A display on the backside of the device realizes the graphical presentation of the current measurement data. It allows the user to evaluate the quality of the measurement result in real-time already during the recording of the measurement under water. For the calibration of the underwater scanner a combined method of air- and water-calibration was developed which needs only a few recorded underwater images of a plane surface and an object with known lengths. First measurement results obtained with the new scanner are presented.

scholarly journals Morphological study of skin cancer lesions through a 3D scanner based on fringe projection and machine learning

2019 ◽  
Vol 10 (7) ◽  
pp. 3404 ◽  
Author(s):  
Laura Rey-Barroso ◽  
Francisco J. Burgos-Fernández ◽  
Miguel Ares ◽  
Santiago Royo ◽  
Susana Puig ◽  
...  
Keyword(s):  
Machine Learning ◽  
Skin Cancer ◽  
Morphological Study ◽  
Fringe Projection ◽  
3D Scanner

Building Three-Dimensional Scanner Based on Structured Light Technique Using Fringe Projection Pattern

2014 ◽  
Vol 14 (3) ◽  
Author(s):  
Hossein Rashidizad ◽  
Abdolreza Rahimi
Keyword(s):  
Low Cost ◽  
Structured Light ◽  
Three Dimensional ◽  
Digital Camera ◽  
Dimensional Accuracy ◽  
Gray Code ◽  
Fringe Projection ◽  
Three Dimensional Model ◽  
3D Scanner ◽  
Projection Pattern

This paper presents the design and construction of a low-cost active noncontact three-dimensional (3D) scanner using the structured light method. The applied method is a generalization of the triangulation technique using a fringe projection pattern (by Gray code technique) to achieve a higher operating speed. The hardware equipment includes a single digital camera and a video projector. matlab was used for the calibration operation, the production of images by the above method, the image processing, and data calculation; while the Geomagic Qualify software was used to estimate the accuracy of the three-dimensional model obtained after scanning and to compare it with the tested object. Regarding the point cloud of the test object, the results demonstrate the precision of the used method and the possibility of developing a 3D scanner with a dimensional accuracy of ±0.05 mm.

scholarly journals Structured-light 3D scanning of exhibited historical clothing—a first-ever methodical trial and its results

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Jerzy Montusiewicz ◽  
Marek Miłosz ◽  
Jacek Kęsik ◽  
Kamil Żyła
Keyword(s):  
Cultural Heritage ◽  
Information Technologies ◽  
Structured Light ◽  
Three Dimensional ◽  
3D Models ◽  
3D Scanning ◽  
Dimensional Representation ◽  
3D Scanner ◽  
Three Dimensional Representation ◽  
3D Scanners

AbstractHistorical costumes are part of cultural heritage. Unlike architectural monuments, they are very fragile, which exacerbates the problems of their protection and popularisation. A big help in this can be the digitisation of their appearance, preferably using modern techniques of three-dimensional representation (3D). The article presents the results of the search for examples and methodologies of implementing 3D scanning of exhibited historical clothes as well as the attendant problems. From a review of scientific literature it turns out that so far practically no one in the world has made any methodical attempts at scanning historical clothes using structured-light 3D scanners (SLS) and developing an appropriate methodology. The vast majority of methods for creating 3D models of clothes used photogrammetry and 3D modelling software. Therefore, an innovative approach was proposed to the problem of creating 3D models of exhibited historical clothes through their digitalisation by means of a 3D scanner using structural light technology. A proposal for the methodology of this process and concrete examples of its implementation and results are presented. The problems related to the scanning of 3D historical clothes are also described, as well as a proposal how to solve them or minimise their impact. The implementation of the methodology is presented on the example of scanning elements of the Emir of Bukhara's costume (Uzbekistan) from the end of the nineteenth century, consisting of the gown, turban and shoes. Moreover, the way of using 3D models and information technologies to popularise cultural heritage in the space of digital resources is also discussed.

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