scholarly journals AUTOMATIC TREE DATA REMOVAL METHOD FOR TOPOGRAPHY MEASUREMENT RESULT USING TERRESTRIAL LASER SCANNER

2017 ◽  
Vol XLII-2/W3 ◽  
pp. 659-664
Author(s):  
H. Yokoyama ◽  
H. Chikatsu
Keyword(s):  
Data Processing ◽  
Cultural Heritage ◽  
Laser Scanner ◽  
Digital Data ◽  
Robust Filtering ◽  
Terrestrial Laser Scanner ◽  
Filtering Method ◽  
Heritage Sites ◽  
The Past ◽  
Digital Data Processing

Recently, laser scanning has been receiving greater attention as a useful tool for real-time 3D data acquisition, and various applications such as city modelling, DTM generation and 3D modelling of cultural heritage sites have been proposed. And, former digital data processing were demanded in the past digital archive techniques for cultural heritage sites. However, robust filtering method for distinguishing on- and off-terrain points by terrestrial laser scanner still have many issues. In the past investigation, former digital data processing using air-bone laser scanner were reported. Though, efficient tree removal methods from terrain points for the cultural heritage are not considered. In this paper, authors describe a new robust filtering method for cultural heritage using terrestrial laser scanner with "the echo digital processing technology" as latest data processing techniques of terrestrial laser scanner.

Microphotometer Digital Data Processing

1971 ◽  
Vol 11 ◽  
pp. 185-187
Author(s):  
J. B. Hutchings
Keyword(s):  
Data Processing ◽  
Digital Data ◽  
Digital Output ◽  
The Past ◽  
Knowing That ◽  
Important Improvement ◽  
Digital Data Processing ◽  
Programming Systems ◽  
Speed And Accuracy

In the past several years many, if not most, observatory microphotometers have been made or adapted to give digital output. At the same time, astronomers have been faced with the task of specifying exactly all the folk lore and experience necessary to reduce microphotometer output, so that the task can be performed by a computer. In addition to the speed and accuracy gains therefore, we have also been obliged to separate the subjective from the objective in this processing, and this may be the most important improvement of all.Knowing that many other observatories have developed similar programming systems, this paper presumably does not contain much that is startlingly new, but it is hoped that it may promote the exchange of ideas desirable to overcome common difficulties and avoid duplication (or multiplication) of effort.

scholarly journals INTEGRATION OF GEOMATICS TECHNIQUES FOR DIGITIZING HIGHLY RELEVANT GEOLOGICAL AND CULTURAL HERITAGE SITES: THE CASE OF SAN LEO (ITALY)

2017 ◽  
Vol XLII-2/W5 ◽  
pp. 281-286 ◽  
Author(s):  
V. A. Girelli ◽  
L. Borgatti ◽  
M. Dellapasqua ◽  
E. Mandanici ◽  
M. C. Spreafico ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Large Scale ◽  
Laser Scanner ◽  
Terrestrial Laser Scanner ◽  
Heritage Sites ◽  
Research Activities ◽  
Dense Point ◽  
Geometrical Information ◽  
Historical Heritage ◽  
The Town

The research activities described in this contribution were carried out at San Leo (Italy). The town is located on the top of a quadrangular rock slab affected by a complex system of fractures and has a wealth of cultural heritage, as evidenced by the UNESCO’s nomination.<br><br> The management of this fragile set requires a comprehensive system of geometrical information to analyse and preserve all the geological and cultural features. In this perspective, the latest Geomatics techniques were used to perform some detailed surveys and to manage the great amount of acquired geometrical knowledge of both natural (the cliff) and historical heritage. All the data were also georeferenced in a unique reference system.<br><br> In particular, high accurate terrestrial laser scanner surveys were performed for the whole cliff, in order to obtain a dense point cloud useful for a large number of geological studies, among others the analyses of the last rockslide by comparing pre- and post-event data.<br><br> Moreover, the geometrical representation of the historical centre was performed using different approaches, in order to generate an accurate DTM and DSM of the site. For these purposes, a large scale numerical map was used, integrating the data with GNSS and laser surveys of the area.<br><br> Finally, many surveys were performed with different approaches on some of the most relevant monuments of the town. In fact, these surveys were performed by terrestrial laser scanner, light structured scanner and photogrammetry, the last mainly applied with the Structure from Motion approach.

scholarly journals TRATAMIENTO DE DATOS TLS MEDIANTE EL EMPLEO DE IMÁGENES ESFÉRICAS: APLICACIÓN A LA DOCUMENTACIÓN DE LA SALA CAPITULAR DE LA CATEDRAL DE JAÉN

2016 ◽  
Author(s):  
JOSE MIGUEL GOMEZ-LOPEZ ◽  
José L. Pérez-García ◽  
Carlos Colomo ◽  
Javier Cardenal ◽  
Emilio Mata
Keyword(s):  
Data Processing ◽  
Cultural Heritage ◽  
Information Extraction ◽  
Laser Scanner ◽  
Point Clouds ◽  
Terrestrial Laser Scanner ◽  
Dense Point ◽  
Study Case ◽  
Spherical Images

Nowadays, one of the techniques more used for documentation of cultural heritage is terrestrial laser scanner (TLS). This kind of instrumental has become essential in this kind of heritage projects. However, in many projects, the captured information by these systems are excessive, which hinders its data processing and information extraction. But when the documentation purpose is limited to the visualization or dissemination, the final products can be simpler than those obtained from the dense point clouds and the resulting detailed models. In this paper it is presented an approach based on TLS data processed with spherical images algorithms. TLS point clouds are used to simulate spherical images allowing the storage, processing, visualization and dissemination of both data and products. This approach has been applied to a real study case in the documentation of the chapterhouse of the Cathedral of Jaén.

scholarly journals The digital data processing concepts of the LOFT mission

2014 ◽  
Author(s):  
C. Tenzer ◽  
A. Argan ◽  
A. Cros ◽  
Y. Favre ◽  
M. Gschwender ◽  
...  
Keyword(s):  
Data Processing ◽  
Digital Data ◽  
Digital Data Processing

scholarly journals UAV and terrestrial laser scanner data processing for large scale topographic mapping

2020 ◽  
Vol 50 ◽  
pp. 63-73
Author(s):  
Ganbold Ulziisaikhan ◽  
Dash Oyuntsetseg
Keyword(s):  
Data Processing ◽  
Spatial Data ◽  
Large Scale ◽  
Laser Scanner ◽  
Measurement Technology ◽  
Topographic Mapping ◽  
Terrestrial Laser Scanner ◽  
Scanner Data ◽  
Processing Scheme ◽  
Digital Elevation

Integrating spatial data from different sources results in visualization, which is the last step in the process of digital basic topographic map creation. Digital elevation model and visualization will used for geomorphological mapping, geospatial database, urban planning and etc. Large scale topographic mapping in the world countries is really a prominent challenge in geospatial industries today. The purpose of this work is to integrate laser scanner data with the ones generated by aerial photogrammetry from UAV, to produce detailed maps that can used by geodetic engineers to optimize their analysis. In addition, terrestrial - based LiDAR scans and UAV photogrammetric data were collected in Sharga hill in the north zone of Mongolia. In this paper, different measurement technology and processing software systems combined for topographic mapping in the data processing scheme. UTM (Universal Transverse Mercator) projected coordinate system calculated in WGS84 reference ellipsoid. Feature compilation involving terrestrial laser scanner data and UAV data will integrated to offer Digital Elevation Models (DEM) as the main interest of the topographic mapping activity. Used UAV generate high-resolution orthomosaics and detailed 3D models of areas where no data, are available. That result issued to create topographic maps with a scale of 1:1000 of geodetic measurements. Preliminary results indicate that discontinuity data collection from UAV closely matches the data collected using laser scanner.

scholarly journals REPLICAS IN CULTURAL HERITAGE: 3D PRINTING AND THE MUSEUM EXPERIENCE

2018 ◽  
Vol XLII-2 ◽  
pp. 55-62 ◽  
Author(s):  
M. Ballarin ◽  
C. Balletti ◽  
P. Vernier
Keyword(s):  
3D Printing ◽  
Cultural Heritage ◽  
Laser Scanner ◽  
Original Data ◽  
Digital Data ◽  
Physical Representation ◽  
Museum Exhibitions ◽  
3D Printed ◽  
Museum Experience ◽  
Partially Sighted

3D printing has seen a recent massive diffusion for several applications, not least the field of Cultural Heritage. Being used for different purposes, such as study, analysis, conservation or access in museum exhibitions, 3D printed replicas need to undergo a process of validation also in terms of metrical precision and accuracy.<br> The Laboratory of Photogrammetry of Iuav University of Venice has started several collaborations with Italian museum institutions firstly for the digital acquisition and then for the physical reproduction of objects of historical and artistic interest. The aim of the research is to analyse the metric characteristics of the printed model in relation to the original data, and to optimize the process that from the survey leads to the physical representation of an object. In fact, this could be acquired through different methodologies that have different precisions (multi-image photogrammetry, TOF laser scanner, triangulation based laser scanner), and it always involves a long processing phase. It should not be forgotten that the digital data have to undergo a series of simplifications, which, on one hand, eliminate the noise introduced by the acquisition process, but on the other one, they can lead to discrepancies between the physical copy and the original geometry. In this paper we will show the results obtained on a small archaeological find that was acquired and reproduced for a museum exhibition intended for blind and partially sighted people.

scholarly journals Aspectus: A Flexible Collaboration Tool for Multimodal and Multiscalar 3D Data Exploitation

2019 ◽  
Vol 2 (2) ◽  
pp. 150-165
Author(s):  
Damien Vurpillot ◽  
Quentin Verriez ◽  
Matthieu Thivet
Keyword(s):  
Cultural Heritage ◽  
Collaborative Work ◽  
Three Dimensional ◽  
Digital Data ◽  
Expert Assessment ◽  
Practical Application ◽  
Web Based ◽  
Heritage Sites ◽  
3D Data ◽  
Tenfold Increase

High density remote survey technologies have become widespread practices. In recent years, we have seen a tenfold increase in volume of digital data acquired. Beyond this sheer amount of data, multimodal three-dimensional data exploitation has become another common challenge for specialists. The Aspectus project aims to ease the access to complex three-dimensional data and to promote collaborative work and remote expert assessment. Thus, we can get past the problem of distance and availability of the “object of expertise”, ranging from cultural heritage sites to artefacts. By extension, it enables us to circumvent the ever-present problem of destruction. Aspectus takes advantage of available open source solutions to produce a flexible web-based visualization and collaboration tool. After an overview of the theoretical framework and its technical implementation, we will discuss a practical application as part of the “Bibracte Numérique” project.

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