scholarly journals VTK Remote Rendering of 3D Laser Scanner Ply files for Android Mobile Devices

2014 ◽  
Author(s):  
Fabio De pascalis
Keyword(s):  
Mobile Devices ◽  
High Performance ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Industrial Sector ◽  
Modern Technology ◽  
Complex Objects ◽  
Remote Rendering ◽  
Three Dimensional Models ◽  
Application Fields

Three-dimensional laser scanner is a modern technology used to detect and capture the shape of complex objects. There are a lot of possible application fields for this technology: applications in the industrial sector (reverse engineering), in the medical field or in the cultural heritage field for virtual reconstruction of works of art. The main goal of this work is to make accessible the three-dimensional models obtained from laser scans on mobile devices (smartphones, tablets), exploiting a remote rendering application on high-performance workstations. This paper also shows how this can be done fairly easily using one of the most popular instruments in the field of scientific visualization, VTK.

Handheld Laser Scanner Research

2019 ◽  
Vol 952 (10) ◽  
pp. 47-54
Author(s):  
A.V. Komissarov ◽  
A.V. Remizov ◽  
M.M. Shlyakhova ◽  
K.K. Yambaev
Keyword(s):  
Point Cloud ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Test Site ◽  
Optical Systems ◽  
Advantages And Disadvantages ◽  
Site Survey ◽  
Laser Scanners ◽  
Three Dimensional Models ◽  
The Stability

The authors consider hand-held laser scanners, as a new photogrammetric tool for obtaining three-dimensional models of objects. The principle of their work and the newest optical systems based on various sensors measuring the depth of space are described in detail. The method of simultaneous navigation and mapping (SLAM) used for combining single scans into point cloud is outlined. The formulated tasks and methods for performing studies of the DotProduct (USA) hand-held laser scanner DPI?8X based on a test site survey are presented. The accuracy requirements for determining the coordinates of polygon points are given. The essence of the performed experimental research of the DPI?8X scanner is described, including scanning of a test object at various scanner distances, shooting a test polygon from various scanner positions and building point cloud, repeatedly shooting the same area of the polygon to check the stability of the scanner. The data on the assessment of accuracy and analysis of research results are given. Fields of applying hand-held laser scanners, their advantages and disadvantages are identified.

scholarly journals Accuracy Analysis Of Three Dimensional Models Of Building Prof. H. Soedarto S. H. Using The Terrestrial Laser Scanner Technology Based On Traverse Method

Teknik ◽  
2019 ◽  
Vol 39 (2) ◽  
pp. 94
Author(s):  
Yudo Prasetyo
Keyword(s):  
Point Cloud ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Terrestrial Laser Scanner ◽  
Accuracy Analysis ◽  
Dimensional Models ◽  
Data Point ◽  
Three Dimensional Models

Teknologi dokumentasi gedung secara spasial untuk konservasi dan perencanaan tata ruang semakin berkembang pesat. Urgensi tingkat ketelitian dalam suatu pengukuran juga dituntut semakin tinggi. Salah satu teknologi pembentukan objek tiga dimensi yang berkembang saat ini adalah Terrestrial Laser Scanner (TLS). Metode pengukuran TLS terdiri atas 4 metode yaitu: Cloud to Cloud, Target to Target, Traverse, dan metode kombinasi. Penelitian ini bertujuan untuk menganalisa tingkat ketelitian metode Traverse dalam pengukuran suatu objek model tiga dimensi untuk keperluan dokumentasi gedung menggunakan TLS.Ketelitian metode Traverse akan diujikan pada Gedung Prof. H. Soedarto, S. H. Tingkat ketelitiannya diujikan pada dua parameter yakni hasil metode registrasi dan hasil visualisasi model tiga dimensi. Hasil analisis pengolahan data point cloud menunjukkan bahwa alat TLS dengan metode Traverse dapat digunakan untuk menghasilkan model tiga dimensi Gedung Prof. Sudarto, S. H. Nilai rata-rata validasi yang diperoleh adalah sebesar 0,004 meter dengan besaran ketelitian model RMSE sebesar ±0,00611 meter. 

scholarly journals METHODS FOR MODELS PARAMETERS ESTIMATE TO SOLVE PROBLEMS ON 3D RECONSTRUCTION OF REAL OBJECTS COMPLEX MODELS

2016 ◽  
Vol 2016 (3) ◽  
pp. 233-242 ◽  
Author(s):  
Владислав Колякин ◽  
Vladislav Kolyakin ◽  
Владимир Аверченков ◽  
Vladimir Averchenkov ◽  
Максим Терехов ◽  
...  
Keyword(s):  
Computer Games ◽  
Three Dimensional ◽  
3D Models ◽  
Model Parameters ◽  
Complex Objects ◽  
Image Brightness ◽  
Real Objects ◽  
Complex Models ◽  
Three Dimensional Models ◽  
Definition Of

Virtual threedimensional (3 D) models of complex objects are used in many fields of science and engineering, such as architecture, industry, medicine, robotics. Besides, 3D models are used in geoinformation systems, computer games, virtual and supplemented reality and so on. Three dimensional models can be formed in dif-ferent ways, one of which consists in 3 D reconstruc-tion. One of the stages of the 3 D reconstruction of complex models of real objects is a definition of the mathematical models of geometric primitives emphasized on the image. One of the ways for the estimate of model parameters is a method of Hough vote and its modifications – Hough probabilistic transformation, Hough random transformation, Hough hierarchical transformation, phase space blurriness, use of a gra-dient of image brightness and so on. As an alternative way for models selection is a choice of suitable points from a set of data.

scholarly journals Amphitheater of Volterra: Case Study for the Representation of Excavation Data

2017 ◽  
Vol 1 (2) ◽  
pp. 269-281
Author(s):  
Carlo Battini ◽  
Elena Sorge
Keyword(s):  
Structure From Motion ◽  
Mobile Application ◽  
Three Dimensional ◽  
Laser Scanner ◽  
3D Models ◽  
Post Processing ◽  
The Subject ◽  
Three Dimensional Models ◽  
Digital Projection

The work presented wants to show how different techniques of expeditious relief can be combined together in order to better describe the subject studied. Techniques of digital projection as laser scanner, topography and Structure from Motion can be used simultaneously and interact with each other to create a rich database of colorimetric and metrics information. Methodologies that, at the same time, present the peculiarities and errors of peculiar relief of the technology employed.The case study examined in this type of research is the discovery of the amphitheater of Volterra. Discovered in July 2015 during the phases of reclamation of a stream, is located close to Porta Diana and a few hundred meters from the Roman Theater discovered in the last century. An excavation campaign undertaken Between October and November 2015 has allowed us to bring to light the crests of the supporting walls of the structure, revealing the presence of the three orders and a depth of about ten meters.The step of post processing has finally seen the use of three-dimensional models acquired both for the creation of images metrics necessary to the study of the stratigraphic units, both for studying a mobile application, 3D models and data of the excavation, easy to use for transmitting the information collected.  

Precision Analysis of Reconstructed Aluminum Alloy Handle

2012 ◽  
Vol 479-481 ◽  
pp. 2226-2230
Author(s):  
Hai Lin Jiang
Keyword(s):  
Aluminum Alloy ◽  
Error Analysis ◽  
Reverse Engineering ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Original Design ◽  
Nc Program ◽  
Dimensional Models ◽  
Scan Data ◽  
Three Dimensional Models

In order to carry out the error analyses of the aluminum alloy in reverse engineering, Mastercam was used to create three-dimensional (3D) parametric solid models and automatically generate NC program files. By using the generated NC program, a simulating is processed on a milling machine. The surface of the obtained product 1 was immediately scanned by a laser scanner. Using the obtained results from the laser scanner, the three-dimensional models were created in Geomagic Studio. Reanalysis of the three dimensional models, product 2 can be obtained. Finally, Error analysis was carried out by comparing the 3D scan data with the original design models. The current research demonstrates that error analysis by the present method is feasible. However, since aluminum was selected as the processing material, the scanned data is not satisfactory; contrast error is greater after reverse engineering.

Estimation of Surface Fault Displacement by High Performance Computing

2018 ◽  
Vol 12 (04) ◽  
pp. 1841003 ◽  
Author(s):  
Masataka Sawada ◽  
Kazumoto Haba ◽  
Muneo Hori
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Nuclear Power ◽  
High Performance ◽  
Time Integration ◽  
Three Dimensional ◽  
Shear Stiffness ◽  
Dynamic Simulations ◽  
Three Dimensional Models ◽  
Element Method

Reliable estimation of surface fault displacements is crucial to the safety of nuclear power plant facilities. It is necessary to develop a numerical method for the estimation. In the study, we develop a finite element method in which the following two functions are implemented: (1) a symplectic time integration of an explicit scheme to properly conserve the energy of the system; and (2) rigorously formulated joint elements of high order. The finite element method is enhanced with parallel computing capability. We apply the developed method to solve simple three-dimensional models of faults embedded in a rock mass. It includes a comparison of results from quasi-static and dynamic simulations and investigation of the sensitivity of results to the shear stiffness on faults. In the study, we propose capacity computing with a quasi-static simulation for uncertainty quantification.

scholarly journals Harbour Infrastructure Inventory Development with 3D Laser Scanning Method

2015 ◽  
Vol 22 (1) ◽  
pp. 99-108
Author(s):  
Sławomir Świerczyński ◽  
Piotr Zwolan
Keyword(s):  
Laser Scanning ◽  
Three Dimensional ◽  
Great Accuracy ◽  
Modern Technology ◽  
3D Laser Scanning ◽  
Scanning Method ◽  
Inventory Development ◽  
Three Dimensional Models ◽  
Polish Law ◽  
Port Infrastructure

Abstract In the Polish law harbour infrastructure is one of key elements to determine the various cargo types, available means of transport and, ultimately, the significance of any sea port. The structures, devices and installations situated within a port’s boundaries, dedicated to the swift operation of the port, are all designed for tasks that involve the best use of this infrastructure. The proper development and modernization of this infrastructure may well result in improved cooperation with road networks and transportation on land. Owing to modern technology, it is possible to scan the surrounding buildings or location with great accuracy and render three-dimensional models of the scanned objects. These models can be used to generate harbour maps with a detailed 3D picture of the entire port and navigational infrastructure. The authors of this article present the possible applications of modern laser scanning technology in port infrastructure surveying, and in particular in the survey of a complicated wharf line on the Motława River along Długie Pobrzeże Street in Gdańsk.

scholarly journals COMPARISON OF UAVS PERFORMANCE FOR A ROMAN AMPHITHEATRE SURVEY: THE CASE OF AVELLA (ITALY)

2019 ◽  
Vol XLII-2/W11 ◽  
pp. 179-186 ◽  
Author(s):  
S. Barba ◽  
M. Barbarella ◽  
A. Di Benedetto ◽  
M. Fiani ◽  
M. Limongiello
Keyword(s):  
Accuracy Assessment ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Point Clouds ◽  
3D Models ◽  
Remote Sensors ◽  
Ground Control Points ◽  
Panoramic Images ◽  
Three Dimensional Models ◽  
The Cost

<p><strong>Abstract.</strong> In the field of archaeological surveying, remote sensors and especially photogrammetric and laser scanner systems are widely used to create 3D models. The use of photogrammetric surveying with UAVs (Unmanned Aerial Vehicles), combined with Computer Vision algorithms, allows the building of three-dimensional models, characterized by photo-realistic textures. The choice of which method to use mainly depends on the complexity of the investigated site, the accuracy requirements and the available budget and time. The different components of the UAV system determine its characteristics in terms of performance and accuracy, therefore define its quality and the cost too. This study presents an assessment of the accuracy of point clouds derived by two UAV systems, a commercial quadcopter (DJI Phantom 3 Professional), a professional assembled hexacopter, and by a TLS (Terrestrial Laser Scanner) in order to compare photogrammetric and laser scanner data for archaeological applications. In this paper, we present a case study to compare and analyse the metric accuracy of the point clouds and the distribution of the GCPs (Ground Control Points). This accuracy assessment will serve to quantify the uncertainty in the absolute position of the GCPs, identified on the panoramic images in the absence of artificial targets. Executed experiments showed that in tested UAVs, the choice of the GCPs has significant impact on point cloud accuracy. Estimated absolute accuracy of point clouds collected during both test flights was better than 5&amp;thinsp;cm.</p>

scholarly journals Comparative Effectiveness of Virtual Reality (VR) vs 3D Printed Models of Congenital Heart Disease in Resident and Nurse Practitioner Educational Experience

2021 ◽  
Author(s):  
Jonathan Awori ◽  
Seth D. Friedman ◽  
Christopher Howard ◽  
Richard Kronmal ◽  
Sujatha Buddhe
Keyword(s):  
Virtual Reality ◽  
Nurse Practitioners ◽  
Three Dimensional ◽  
Educational Experience ◽  
Modern Technology ◽  
Cardiac Anatomy ◽  
Normal Heart ◽  
Pediatric Residents ◽  
3D Printed ◽  
Three Dimensional Models

Abstract Background: Medical trainees frequently note that cardiac anatomy is difficult to conceive within a two dimensional framework. The dynamics of flow and nuances of defects become more apparent when framed in three-dimensional models. Given the evidence of improved comprehension using such modeling, this study aimed to contribute further to that understanding by comparing Virtual Reality (VR) and 3D printed models (3DP) in medical education. Objectives: We sought to systematically compare the perceived subjective effectiveness of Virtual Reality (VR) and 3D printed models (3DP) in the educational experience of residents and nurse practitioners. Methods: Trainees and practitioners underwent individual 15-minute teaching sessions in which features of an anatomically normal heart as well as a congenitally diseased heart were demonstrated using both Virtual Reality (VR) and 3-D printed models (3DP). Participants then briefly explored each modality before filling out a short survey in which they identified which model (3DP or VR) they felt was more effective in enhancing their understanding of cardiac anatomy and associated defects. The survey included a binary summative assessment and a series of Likert scale questions addressing usefulness of each model type and degree of comfort with each modality. Results: 27 pediatric residents and 3 nurse practitioners explored models of normal heart and tetralogy of Fallot pathology. Participants endorsed a greater degree of understanding with VR models (8.5±1) compared with 3D Printed models (6.3±1.8) or traditional models of instruction (5.5±1.5) p<0.001. Most participants had minimal prior exposure to VR (1.1 ± 0.4) or 3-D printed models (2.1 ± 1.5). Most participants felt comfortable with modern technology (7.6 ± 2.1). 87% of participants preferred VR over 3DP. Conclusions: Our study shows that, overall, VR was preferred over 3DP models by pediatric residents and nurse practitioners for understanding cardiac anatomy and pathophysiology.

scholarly journals Development of an application for mobile devices with augmented reality for the teaching of fracture characteristics

2018 ◽  
Author(s):  
Andrés Mauricio Arciniegas ◽  
José Alonso Oviedo Monroy
Keyword(s):  
Augmented Reality ◽  
Mobile Devices ◽  
Learning Process ◽  
Three Dimensional ◽  
Bone Lesions ◽  
Innovation Project ◽  
Three Dimensional Models ◽  
Epidemiological Profile ◽  
National Training ◽  
Teaching Learning

Introduction: this article is a product of the innovation project “Integration of augmented reality in the teaching-learning process of bone injuries”, developed during 2018 in the Trade and Services Center of the National Training Service SENA in Tolima. Problem: The Trade and Services Center, and the technological network of health services does not have an easily accessible tool that allows you to permanently develop a knowledge check against possible cases of polytraumatism and the incidence of fractures in front of the epidemiological profile making an identification of the characteristics of the same. Objective: Integrate augmented reality tools in the teaching-learning process of bone injuries. Methodology: Descriptive-propositive of qualitative nature, descriptive when skeletal lesions were characterized and propositive as soon as an application for mobile devices was generated aimed at improving the teaching-learning process of fractures. Results: a mobile application based on Augmented Reality was developed, which supports the teaching-learning process of bone injuries. Conclusions: three-dimensional models of bones and bone lesions have been recreated, allowing trainees to assimilate their characteristics and primary management effectively, thus reinforcing their learning through interactive contents. Limitations: the project only covers the learning of bone injuries.

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