scholarly journals Automated Image-Based Procedures for Accurate Artifacts 3D Modeling and Orthoimage Generation

2011 ◽  
Vol 6 ◽  
pp. 291-299 ◽  
Author(s):  
Marc Pierrot-Deseilligny ◽  
Livio De Luca ◽  
Fabio Remondino
Keyword(s):  
Best Practices ◽  
3D Modeling ◽  
Point Clouds ◽  
Museum Collections ◽  
Technical Documentation ◽  
Web Based ◽  
3D Point Clouds ◽  
Web Visualization ◽  
3D Documentation ◽  
Software Methodologies

The accurate 3D documentation of architectures and heritages is getting very common and required in different application contexts. The potentialities of the image-based approach are nowadays very well-known but there is a lack of reliable, precise and flexible solutions, possibly open-source, which could be used for metric and accurate documentation or digital conservation and not only for simple visualization or web-based applications. The article presents a set of photogrammetric tools developed in order to derive accurate 3D point clouds and orthoimages for the digitization of archaeological and architectural objects. The aim is also to distribute free solutions (software, methodologies, guidelines, best practices, etc.) based on 3D surveying and modeling experiences, useful in different application contexts (architecture, excavations, museum collections, heritage documentation, etc.) and according to several representations needs (2D technical documentation, 3D reconstruction, web visualization, etc.).<br />

scholarly journals GEOMETRIC FEATURES ANALYSIS FOR THE CLASSIFICATION OF CULTURAL HERITAGE POINT CLOUDS

2019 ◽  
Vol XLII-2/W15 ◽  
pp. 541-548 ◽  
Author(s):  
E. Grilli ◽  
E. M. Farella ◽  
A. Torresani ◽  
F. Remondino
Keyword(s):  
Artificial Intelligence ◽  
Machine Learning ◽  
Cultural Heritage ◽  
Point Clouds ◽  
Geometric Features ◽  
3D Point Clouds ◽  
3D Data ◽  
3D Documentation ◽  
The Impact

<p><strong>Abstract.</strong> In the last years, the application of artificial intelligence (Machine Learning and Deep Learning methods) for the classification of 3D point clouds has become an important task in modern 3D documentation and modelling applications. The identification of proper geometric and radiometric features becomes fundamental to classify 2D/3D data correctly. While many studies have been conducted in the geospatial field, the cultural heritage sector is still partly unexplored. In this paper we analyse the efficacy of the geometric covariance features as a support for the classification of Cultural Heritage point clouds. To analyse the impact of the different features calculated on spherical neighbourhoods at various radius sizes, we present results obtained on four different heritage case studies using different features configurations.</p>

scholarly journals A sensor skid for precise 3D modeling of production lines

2014 ◽  
Vol II-5 ◽  
pp. 117-122 ◽  
Author(s):  
J. Elseberg ◽  
D. Borrmann ◽  
J. Schauer ◽  
A. Nüchter ◽  
D. Koriath ◽  
...  
Keyword(s):  
3D Modeling ◽  
Production Line ◽  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Point Clouds ◽  
Production Lines ◽  
3D Point Clouds ◽  
Laser Scanners ◽  
Rapid Characterization

Motivated by the increasing need of rapid characterization of environments in 3D, we designed and built a sensor skid that automates the work of an operator of terrestrial laser scanners. The system combines terrestrial laser scanning with kinematic laser scanning and uses a novel semi-rigid SLAMmethod. It enables us to digitize factory environments without the need to stop production. The acquired 3D point clouds are precise and suitable to detect objects that collide with items moved along the production line.

Concepts and techniques for web-based visualization and processing of massive 3D point clouds with semantics

2019 ◽  
Vol 104 ◽  
pp. 101036 ◽  
Author(s):  
Sören Discher ◽  
Rico Richter ◽  
Jürgen Döllner
Keyword(s):  
Point Clouds ◽  
Web Based ◽  
3D Point Clouds

scholarly journals 3D Documentation with TLS of Caliphal Gate (Ceuta, Spain)

2020 ◽  
Vol 10 (15) ◽  
pp. 5377
Author(s):  
Rubén Pérez-Álvarez ◽  
Julio Manuel de Luis-Ruiz ◽  
Raúl Pereda-García ◽  
Gema Fernández-Maroto ◽  
Beatriz Malagón-Picón
Keyword(s):  
Data Management ◽  
3D Modeling ◽  
3D Model ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Point Clouds ◽  
Portable Document Format ◽  
Interactive Applications ◽  
3D Documentation ◽  
Document Format

Three-dimensional surveying with a terrestrial laser scanner (TLS) has implied a revolution in the field of 3D modeling, as this methodology provides detailed point-clouds with simplified processes of capture. In addition to the point-clouds, other outputs can be obtained, such as ortho-images, virtual itineraries, 2D cartography, and meshes, which implies a second avenue of multimedia products, such as 3D Portable Document Format (PDF) files and interactive applications. All these options are interesting for the management and broadcast of cultural heritage. The works that have been developed in this research are aimed at setting a workflow for the TLS surveying works and subsequent data management for the generation of a 3D model of the Caliphal Gate of Ceuta, which is considered as one of the most important medieval findings in Spain in recent years, and its immediate surroundings. This model and the different outputs that have been obtained from it allow for the continuation of the historiographic analysis of the complex, while documenting a partial stage in the development of the works of enhancement. In addition to this, these products are not only useful in terms of conservation studies or enhancement, as they are also suitable for the dissemination of the site. Special attention has been set on the paid suitable software for data management while generating the outputs, and for its application by the final users.

scholarly journals 3D Modeling from Multi-views Images for Cultural Heritage in Wat-Pho, Thailand

2015 ◽  
Vol XL-5/W7 ◽  
pp. 403-407 ◽  
Author(s):  
N. Soontranon ◽  
P. Srestasathiern ◽  
S. Lawawirojwong
Keyword(s):  
3D Modeling ◽  
Laser Scanner ◽  
Point Clouds ◽  
3D Models ◽  
Public Access ◽  
3D Point Clouds ◽  
Surface Simplification ◽  
Triangulated Surfaces ◽  
Initial Work ◽  
Printed Materials

In Thailand, there are several types of (tangible) cultural heritages. This work focuses on 3D modeling of the heritage objects from multi-views images. The images are acquired by using a DSLR camera which costs around $1,500 (camera and lens). Comparing with a 3D laser scanner, the camera is cheaper and lighter than the 3D scanner. Hence, the camera is available for public users and convenient for accessing narrow areas. The acquired images consist of various sculptures and architectures in Wat-Pho which is a Buddhist temple located behind the Grand Palace (Bangkok, Thailand). Wat-Pho is known as temple of the reclining Buddha and the birthplace of traditional Thai massage. To compute the 3D models, a diagram is separated into following steps; <i>Data acquisition</i>, <i>Image matching</i>, <i>Image calibration and orientation</i>, <i>Dense matching</i> and <i>Point cloud processing</i>. For the initial work, small heritages less than 3 meters height are considered for the experimental results. A set of multi-views images of an interested object is used as input data for 3D modeling. In our experiments, 3D models are obtained from MICMAC (open source) software developed by IGN, France. The output of 3D models will be represented by using standard formats of 3D point clouds and triangulated surfaces such as .ply, .off, .obj, etc. To compute for the efficient 3D models, post-processing techniques are required for the final results e.g. noise reduction, surface simplification and reconstruction. The reconstructed 3D models can be provided for public access such as website, DVD, printed materials. The high accurate 3D models can also be used as reference data of the heritage objects that must be restored due to deterioration of a lifetime, natural disasters, etc.

scholarly journals A LOW-COST PANORAMIC CAMERA FOR THE 3D DOCUMENTATION OF CONTAMINATED CRIME SCENES

2017 ◽  
Vol XLII-2/W8 ◽  
pp. 1-8
Author(s):  
D. Abate ◽  
I. Toschi ◽  
C. Sturdy-Colls ◽  
F. Remondino
Keyword(s):  
3D Reconstruction ◽  
Low Cost ◽  
Point Clouds ◽  
Crime Scene ◽  
Data Registration ◽  
3D Point Clouds ◽  
3D Geometry ◽  
Before And After ◽  
Feature Based ◽  
3D Documentation

Crime scene documentation is a fundamental task which has to be undertaken in a fast, accurate and reliable way, highlighting evidence which can be further used for ensuring justice for victims and for guaranteeing the successful prosecution of perpetrators. The main focus of this paper is on the documentation of a typical crime scene and on the rapid recording of any possible contamination that could have influenced its original appearance. A 3D reconstruction of the environment is first generated by processing panoramas acquired with the low-cost Ricoh Theta 360 camera, and further analysed to highlight potentials and limits of this emerging and consumer-grade technology. Then, a methodology is proposed for the rapid recording of changes occurring between the original and the contaminated crime scene. The approach is based on an automatic 3D feature-based data registration, followed by a cloud-to-cloud distance computation, given as input the 3D point clouds generated before and after e.g. the misplacement of evidence. All the algorithms adopted for panoramas pre-processing, photogrammetric 3D reconstruction, 3D geometry registration and analysis, are presented and currently available in open-source or low-cost software solutions.

scholarly journals Comparison Of Laser Scanning And Photogrammetry And Their Use For Digital Recording Of Cultural Monument Case Study: Byzantine Land Walls-Istanbul

2015 ◽  
Vol II-5/W3 ◽  
pp. 17-24 ◽  
Author(s):  
B. Bayram ◽  
G. Nemli ◽  
T. Özkan ◽  
O. E. Oflaz ◽  
B. Kankotan ◽  
...  
Keyword(s):  
3D Modeling ◽  
Laser Scanning ◽  
Point Clouds ◽  
Camera Systems ◽  
3D Point Clouds ◽  
Dense Matching ◽  
Dense Point ◽  
Processing Techniques ◽  
Object Models ◽  
Survey Planning

3D modeling of cultural monuments is very crucial issue for preparing restoration projects. However, it has challenges such as data acquisition, preparation and processing. 3D modeling of objects can be time consuming and may include some difficulties due to the complexity of the structures. 3D terrestrial laser (TLS) scanning technique is one of the reliable and advantageous methods for 3D reconstruction of monuments. This technique is commonly acknowledged due to its accuracy, speed and flexibility. But the suitability and capability of this technique depends on proper usage, and good survey planning. Magnificent developments in highresolution digital sensor technologies leaded to manufacturing of new camera systems. Parallel to these innovations, development of computer systems and image processing techniques made enable to obtain multiple image-based 3D object models. In the presented study, TLS method has been compared to conventional photogrammetric and image-based dense matching methods. Automatic dense point creation has been realized by our developed algorithm and PIXEL-PHOTO software which generates 3D point clouds from stereo images. The reliability and encountered problems during point cloud measurement process have been discussed. The study area has been chosen as historical Byzantine Land Walls of Istanbul, which constitute a remarkable area defining the ancient city’s historical peninsula.

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