scholarly journals SfM for Orthophoto to Generation: A Winning Approach for Cultural Heritage Knowledge

2015 ◽  
Vol XL-5/W7 ◽  
pp. 91-98 ◽  
Author(s):  
F. Chiabrando ◽  
E. Donadio ◽  
F. Rinaudo
Keyword(s):  
Cultural Heritage ◽  
Structure From Motion ◽  
Image Matching ◽  
Accuracy Assessment ◽  
Low Cost ◽  
Survey Techniques ◽  
Large Sets ◽  
The Rich ◽  
Rich Content ◽  
Digital Survey

3D detailed models derived from digital survey techniques have increasingly developed and focused in many field of application. The high detailed content and accuracy of such models make them so attractive and usable for large sets of purposes in Cultural Heritage. The present paper focuses on one of the main techniques used nowadays for Cultural Heritage survey and documentation: the image matching approach or Structure from Motion (SfM) technique. According to the low cost nature and the rich content of derivable information, these techniques are extremely strategic in poor available resources sectors such as Cultural Heritage documentation. <br><br> After an overview of the employed algorithms and used approaches of SfM computer vision based techniques, the paper is focused in a critical analysis of the strategy used by two common employed software: the commercial suite Agisoft Photoscan and the open source tool MicMac realized by IGN France. The experimental section is focused on the description of applied tests (from RPAS data to terrestrial acquisitions), purposed to compare different solutions in various featured study cases. Finally, the accuracy assessment of the achieved products is compared and analyzed according to the strategy employed by the studied software.

scholarly journals INTEGRATED GEOMATIC TECHNIQUES FOR THE LOCALIZATION AND GEOREFERENCING OF ANCIENT HERMITAGES

2021 ◽  
Vol XLVI-M-1-2021 ◽  
pp. 31-37
Author(s):  
V. Baiocchi ◽  
M. Onori ◽  
M. Scuti
Keyword(s):  
Structure From Motion ◽  
Accuracy Assessment ◽  
Low Cost ◽  
Second World War ◽  
The Other ◽  
Geographical Information ◽  
World War ◽  
Survey Techniques ◽  
Second World ◽  
Do So

Abstract. Historical maps represent an important source of geographical information. The changes occurred over time can be extrapolated from them, especially if their geometric accuracies match those achievable with modern survey techniques. An 1820 map belonging to the Gregorian Cadastre provides the position of seven hermitages belonging to the monastery of Fara in Sabina (Italy). Just three of them are nowadays visible, while the others may have been covered by thick vegetation or been destroyed during the Second World War. The paper proposes the integration of geomatic techniques for the localization of the lost hermitages. To do so, Structure from Motion (SfM) algorithms were applied to UAV imagery to produce an orthophoto of the area. In addition, a GNSS survey was carried out using a professional and a low-cost receiver to correctly georeference the photogrammetric products. An accuracy assessment was then performed to evaluate the performance of the u-blox board in real applications. The accuracies obtained with the low-cost receiver indicates a possible more widespread utilization of these new devices. Subsequently, the comparison between the orthophoto and the cadastral map have been detailed. A weak correspondence between the position of the hermitages in the two maps have been observed. On the other side, the comparison led to the localization of two lost hermitages, with the other two being still undiscovered. This study has opened the door to an enhancement process of the monastery and to the rediscovery of the religious values of the hermitages.

Rapid mapping accuracy assessment using low-cost UAV and open-source Structure from Motion

2020 ◽  
Vol 52 ◽  
pp. 55-61
Author(s):  
Ettore Potente ◽  
Cosimo Cagnazzo ◽  
Alessandro Deodati ◽  
Giuseppe Mastronuzzi
Keyword(s):  
Open Source ◽  
Structure From Motion ◽  
Accuracy Assessment ◽  
Low Cost ◽  
Mapping Accuracy ◽  
Rapid Mapping ◽  
Source Structure

scholarly journals DIGITAL SURVEY TECHNIQUES FOR THE DOCUMENTATION OF WOODEN SHIPWRECKS

2016 ◽  
Vol XLI-B5 ◽  
pp. 237-242 ◽  
Author(s):  
E. Costa ◽  
C. Balletti ◽  
C. Beltrame ◽  
F. Guerra ◽  
P. Vernier
Keyword(s):  
Cultural Heritage ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Point Clouds ◽  
Point Of View ◽  
Principal Type ◽  
Recording Technique ◽  
Survey Techniques ◽  
Roman Age ◽  
Digital Survey

Nowadays, researchers widely employ the acquisition of point clouds as one of the principal type of documentation for cultural heritage. In this paper, different digital survey techniques are employed to document a wooden ancient shipwreck, a particular and difficult kind of archaeological finding due to its material characteristics. The instability of wood and the high costs of restoration do not always offer the opportunity of recovering and showing the hull to researchers and public and three-dimensional surveys are fundamental to document the original conditions of the wood. The precarious conditions of this material in contact with air could modify the structure and the size of the boat, requiring a fast and accurate recording technique. The collaboration between Ca' Foscari University and the Laboratory of Photogrammetry of Iuav University of Venice has given the possibility to demonstrate the utility of these technology. We have surveyed a sewn boat of Roman age through multi-image photogrammetry and laser scanner. Point clouds were compared and a residual analysis was done, to verify the characteristics and the opportunity of the two techniques, both of them have allowed obtaining a very precise documentation from a metrical point of view.

scholarly journals The Value Of Webcams For Virtual Teams

2012 ◽  
Vol 16 (2) ◽  
pp. 161 ◽  
Author(s):  
Joel Olson ◽  
Frank Appunn ◽  
Kimberly Walters ◽  
Lynn Grinnell ◽  
Chad McAllister
Keyword(s):  
Virtual Teams ◽  
Low Cost ◽  
Team Building ◽  
Exploratory Research ◽  
Team Process ◽  
Team Members ◽  
Geographically Dispersed ◽  
Use Of Technology ◽  
The Rich ◽  
Rich Content

The latest low-cost technology solutions provide practical and reliable video options form standard personal computers using the Internet. By adding video to an established and geographically dispersed team process, this exploratory research tries to establish the experience of participants and perceived effectiveness of the team. Building on the literature, this qualitative research performs a content analysis design on a text transcription of weekly audio logs from participants. This approach analyzes the rich content of team members to discover the relevance of differing elements within trust, technology, and effectiveness find support. By understanding the influences of adding video to teams, leaders, and managers should be able to make informed decisions regarding the adoption of video for each participant. The attitude evolution regarding the use of technology over a period of six weeks provides further considerations for deployment.

scholarly journals UAVs for Structure-From-Motion Coastal Monitoring: A Case Study to Assess the Evolution of Embryo Dunes over a Two-Year Time Frame in the Po River Delta, Italy

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1717 ◽  
Author(s):  
Yuri Taddia ◽  
Corinne Corbau ◽  
Elena Zambello ◽  
Alberto Pellegrinelli
Keyword(s):  
Cross Sections ◽  
Structure From Motion ◽  
Accuracy Assessment ◽  
Low Cost ◽  
Three Dimensional ◽  
Time Frame ◽  
Three Dimensional Model ◽  
Dune System ◽  
Po River ◽  
Time Saving

Coastal environments are usually characterized by a brittle balance, especially in terms of sediment transportation. The formation of dunes, as well as their sudden destruction as a result of violent storms, affects this balance in a significant way. Moreover, the growth of vegetation on the top of the dunes strongly influences the consequent growth of the dunes themselves. This work presents the results obtained through a long-term monitoring of a complex dune system by the use of Unmanned Aerial Vehicles (UAVs). Six different surveys were carried out between November 2015 and December 2017 in the littoral of Rosolina Mare (Italy). Aerial photogrammetric data were acquired during flight repetitions by using a DJI Phantom 3 Professional with the camera in a nadiral arrangement. The processing of the captured images consisted of the reconstruction of a three-dimensional model using the Structure-from-Motion (SfM). Each model was framed in the European Terrestrial Reference System (ETRS) using GNSS geodetic receivers in Network Real Time Kinematic (NRTK). Specific data management was necessary due to the vegetation by filtering the dense cloud. This task was performed by both performing a slope detection and a removal of the residual outliers. The final products of this approach were thus represented by Digital Elevation Models (DEMs) of the sandy coastal section. In addition, DEMs of Difference (DoD) were also computed for the purpose of monitoring over time and detecting variations. The accuracy assessment of the DEMs was carried out by an elevation comparison through especially GNSS-surveyed points. Relevant cross sections were also extracted and compared. The use of the Structure-from-Motion approach by UAVs finally proved to be both reliable and time-saving thanks to quicker in situ operations for the data acquisition and an accurate reconstruction of high-resolution elevation models. The low cost of the system and its flexibility represent additional strengths, making this technique highly competitive with traditional ones.

scholarly journals Replacement of Professional Photogrammetric Workstations with Low Cost or Free of Charge Photogrammetric Software and Services for Image Triangulation and Image Matching

2013 ◽  
Vol 12 ◽  
pp. 42-48
Author(s):  
Umesh Kumar
Keyword(s):  
Digital Technology ◽  
Image Matching ◽  
Accuracy Assessment ◽  
Low Cost ◽  
Image Data ◽  
Free Software ◽  
Commercial Software ◽  
Aerial Triangulation ◽  
Modern Context ◽  
Image Orientation

In the modern context of digital technology in the field of surveying and mapping, the technique of digital photogrammetry plays crucial role in all steps of mapping. There are some very expensive as well as low cost and free softwares are available in the market for professional photogrammetric work stations. The image triangulation and image matching is one of the very important steps of photogrammetry for which LPS as a commercial software is available in market. There are some low cost and free software as 123D Catch and Patch Boased Multi View Stereo Softwear (PMVS) also available. So, this paper mainly deals with the accuracy as well as the performance of those software for aerial triangulation and image matching for airborne image data to substitute commercial software for photogrammetric workstations. The accuracy assessment of image orientation, points cloud as well as DSM generated from those points cloud are also performed and compared with all products of LPS as commercial software. Nepalese Journal on Geoinformatics -12, 2070 (2013AD): 42-48

scholarly journals DIGITAL SURVEY TECHNIQUES FOR THE DOCUMENTATION OF WOODEN SHIPWRECKS

2016 ◽  
Vol XLI-B5 ◽  
pp. 237-242 ◽  
Author(s):  
E. Costa ◽  
C. Balletti ◽  
C. Beltrame ◽  
F. Guerra ◽  
P. Vernier
Keyword(s):  
Cultural Heritage ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Point Clouds ◽  
Point Of View ◽  
Principal Type ◽  
Recording Technique ◽  
Survey Techniques ◽  
Roman Age ◽  
Digital Survey

Nowadays, researchers widely employ the acquisition of point clouds as one of the principal type of documentation for cultural heritage. In this paper, different digital survey techniques are employed to document a wooden ancient shipwreck, a particular and difficult kind of archaeological finding due to its material characteristics. The instability of wood and the high costs of restoration do not always offer the opportunity of recovering and showing the hull to researchers and public and three-dimensional surveys are fundamental to document the original conditions of the wood. The precarious conditions of this material in contact with air could modify the structure and the size of the boat, requiring a fast and accurate recording technique. The collaboration between Ca' Foscari University and the Laboratory of Photogrammetry of Iuav University of Venice has given the possibility to demonstrate the utility of these technology. We have surveyed a sewn boat of Roman age through multi-image photogrammetry and laser scanner. Point clouds were compared and a residual analysis was done, to verify the characteristics and the opportunity of the two techniques, both of them have allowed obtaining a very precise documentation from a metrical point of view.

scholarly journals DIGITAL SURVEY IN BRAMANTE'S MASTERPIECES

2019 ◽  
Vol XLII-2/W15 ◽  
pp. 193-200 ◽  
Author(s):  
C. Bolognesi ◽  
F. Fiorillo
Keyword(s):  
Cultural Heritage ◽  
Virtual Environments ◽  
Cross Section ◽  
Broad Spectrum ◽  
Survey Techniques ◽  
Last Supper ◽  
Spare Time ◽  
Santa Maria ◽  
Digital Survey ◽  
A Current

<p><strong>Abstract.</strong> This paper is part of a current of researches that deal with the survey of Cultural Heritage as the first tool of knowledge and dissemination of the memory and value of ancient architecture. The progress of survey techniques and the spread of new tools and measurements instruments obliges frequents update in our project; the survey also compares itself with progression over the time, especially when the context of interest is broad as in the case here described. Here the complex of Santa Maria delle Grazie has been surveyed starting from the Chiostro delle Rane and Old Sacristy, including the room of the Candle man, by Donato Bramante, the Chiostro del Priore, built through the years with the aid of Beltrami and Portaluppi, and the New Sacristy. The cathedral survey and the Last supper room together with The Chiostro dei Morti has not yet been included; this first part has been considered as a first cross section enough to present first problems, techniques and aims. In addition, the destination of the survey in progress has been evaluated on a broad spectrum: from comparison with other Bramante’s masterpieces to the map rendering of some of its decorated parts to the construction of simple meshes for the reconstruction of virtual environments. This is the reason why some part of the complex has been surveyed with more attention and high-detail while other with more simplicity and low-detail, not only to spare time.</p>

scholarly journals ACCESS AND WEB-SHARING OF 3D DIGITAL DOCUMENTATION OF ENVIRONMENTAL AND ARCHITECTURAL HERITAGE

2019 ◽  
Vol XLII-2/W9 ◽  
pp. 707-714 ◽  
Author(s):  
C. Tommasi ◽  
F. Fiorillo ◽  
B. Jiménez Fernández-Palacios ◽  
C. Achille
Keyword(s):  
Cultural Heritage ◽  
Best Practice ◽  
Three Dimensional ◽  
Architectural Heritage ◽  
Survey Techniques ◽  
Multi Scale ◽  
Tangible Assets ◽  
Digital Documentation ◽  
Time Systems ◽  
Digital Survey

<p><strong>Abstract.</strong> The techniques and methods to capture and represent in a three-dimensional digital space the shape of objects belonging to Cultural Heritage have become more widespread, regarding both the economic and practical accessibility of technologies and equipment. At the same time, systems and tools have developed to integrate different 3D survey techniques that allow to achievement a complete acquisition of the tangible assets, considering the purposes of the survey, the required accuracy and the representation scale.</p><p>The product of an integrated (image-based and range-base acquisition) and multi-scale (architectural and landscape scale) digital survey is a metric 3D reconstruction, potentially suitable for a broader ‘use’ and ‘user’ and not only for visualisation and documentation. According to this vision, the 3D model becomes a container of information, which include different type of data depending on the users and the aim of the work. The final result of this process can be the valorisation of the Cultural Heritage and its environment, through the access from experts and non-experts users. The aim of the article is showing the entire pipeline for 3D measurement, survey data acquisition, modelling, and representation of tangible assets and the related layers of information, as “best practice” to improve the Cultural Heritage knowledge, fruition, and sharing.</p>

Biblical Literacy and the English King James Liberal Bible

2014 ◽  
Vol 7 (2) ◽  
pp. 197-211
Author(s):  
James Crossley
Keyword(s):  
Cultural Heritage ◽  
Test Case ◽  
Biblical Literacy ◽  
The Public ◽  
Public Arena ◽  
The Bible ◽  
Liberal Capitalism ◽  
The Rich ◽  
Popular Nationalism ◽  
King James Bible

Using the 400th anniversary of the King James Bible as a test case, this article illustrates some of the important ways in which the Bible is understood and consumed and how it has continued to survive in an age of neoliberalism and postmodernity. It is clear that instant recognition of the Bible-as-artefact, multiple repackaging and pithy biblical phrases, combined with a popular nationalism, provide distinctive strands of this understanding and survival. It is also clear that the KJV is seen as a key part of a proud English cultural heritage and tied in with traditions of democracy and tolerance, despite having next to nothing to do with either. Anything potentially problematic for Western liberal discourse (e.g. calling outsiders “dogs,” smashing babies heads against rocks, Hades-fire for the rich, killing heretics, using the Bible to convert and colonize, etc.) is effectively removed, or even encouraged to be removed, from such discussions of the KJV and the Bible in the public arena. In other words, this is a decaffeinated Bible that has been colonized by, and has adapted to, Western liberal capitalism.

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