scholarly journals 3D modelling of trompe l'oeil decorated vaults using dense matching techniques

2014 ◽  
Vol II-5 ◽  
pp. 97-104 ◽  
Author(s):  
F. Chiabrando ◽  
A. Lingua ◽  
F. Noardo ◽  
A. Spano
Keyword(s):  
Detailed Analysis ◽  
Open Source ◽  
Open Source Software ◽  
Software Tools ◽  
3D Modelling ◽  
Complex Objects ◽  
Trompe L'oeil ◽  
Dense Matching ◽  
Automatic Matching ◽  
Matching Techniques

Dense matching techniques, implemented in many commercial and open source software, are useful instruments for carrying out a rapid and detailed analysis of complex objects, including various types of details and surfaces. For this reason these tools were tested in the metric survey of a frescoed ceiling in the hall of honour of a baroque building. The surfaces are covered with trompe-l’oeil paintings which theoretically can give a very good texture to automatic matching algorithms but in this case problems arise when attempting to reconstruct the correct geometry: in fact, in correspondence with the main architectonic painted details, the models present some irregularities, unexpectedly coherent with the painted drawing. The photogrammetric models have been compared with data deriving from a LIDAR survey of the same object, to evaluate the entity of this blunder: some profiles of selected sections have been extracted, verifying the different behaviours of the software tools.

scholarly journals Open-source software tools for measuring resources consumption and DASH metrics

2020 ◽  
Author(s):  
Mario Montagud ◽  
Juan Antonio De Rus ◽  
Rafael Fayos-Jordan ◽  
Miguel Garcia-Pineda ◽  
Jaume Segura-Garcia
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Software Tools

scholarly journals Practical application of open source software tools in cryptography

2014 ◽  
pp. 115-135 ◽  
Author(s):  
Dragan Ranđelović ◽  
Miloš Ranđelović ◽  
Željko Kuzmanović
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Software Tools ◽  
Practical Application

scholarly journals An Online Dynamic Examination System (ODES) based on open source software tools

2021 ◽  
Vol 7 ◽  
pp. 100046
Author(s):  
George F. Fragulis ◽  
Maria Papatsimouli ◽  
Lazaros Lazaridis ◽  
Ioannis A. Skordas
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Software Tools ◽  
Examination System ◽  
Dynamic Examination

Demonstration of an Aerodynamic Design Process for Turbomachines Using Open Source Software Tools

2010 ◽  
Author(s):  
Oliver Borm ◽  
Balint Balassa ◽  
Sebastian Barthmes ◽  
Julius Fellerhoff ◽  
Andreas Ku¨hrmann ◽  
...  
Keyword(s):  
Open Source ◽  
Design Process ◽  
Open Source Software ◽  
Compressible Flows ◽  
Three Dimensional ◽  
Axial Compressor ◽  
Software Tools ◽  
Two Dimensional ◽  
Aerodynamic Design ◽  
Student Projects

This paper demonstrates an aerodynamic design process for turbomachines for compressible flows, using exclusively open source software tools. Some relevant software already existed and few additional components were required, which have been developed mainly by students and are available at ftp.lfa.mw.tum.de. The geometry of turbomachine blades is described with a newly developed NURBS based blade designer. One-dimensional preliminary analysis is done with OpenOffice.org Calc and an extended mean line program, where loss models are already included. For two-dimensional through-flow computations a compressible streamline curvature method was implemented. Two-dimensional blade-to-blade and three-dimensional simulations are performed with the CFD toolbox OpenFOAM. The two- and three-dimensional results are visualized and analyzed using the open source postprocessing tool ParaView. The presented tools are regularly used in student projects. A generic one stage axial compressor was created with the workflow as a showcase in order to demonstrate the capabilities of the open source software tools.

Evaluation of three methods for retrospective correction of vignetting on medical microscopy images utilizing two open source software tools

2011 ◽  
Vol 244 (3) ◽  
pp. 320-324 ◽  
Author(s):  
GEORGIOS BABALOUKAS ◽  
NICHOLAS TENTOLOURIS ◽  
STAVROS LIATIS ◽  
ALEXANDRA SKLAVOUNOU ◽  
DESPOINA PERREA
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Software Tools ◽  
Microscopy Images

scholarly journals Coping with Variation in the Icelandic Diachronic Treebank

2011 ◽  
Vol 3 (2) ◽  
Author(s):  
Eiríkur Rögnvaldsson ◽  
Anton Karl Ingason ◽  
Einar Freyr Sigurðsson
Keyword(s):  
Open Source ◽  
Computational Linguistics ◽  
Open Source Software ◽  
Spoken Language ◽  
Software Tools ◽  
Linguistic Knowledge ◽  
Limited Resources ◽  
Language Technology ◽  
Technological Skills ◽  
Ongoing Project

We present an overview of an ongoing project which has the aim of developing methods for building a treebank of Icelandic. The treebank will contain both written and spoken language, and in addition have a diachronic dimension. Since Icelandic is an example of what has been called a less-resourced language when it comes to computational linguistics and language technology, it is essential to utilize the limited resources available as economically and efficiently as possible. We emphasize the importance of open source software and the interplay between linguistic knowledge and technological skills. We describe the workflow in the construction of the treebank and show how the different software tools work together towards the final representation. Finally, we show how the treebank can be used in studying some well known phenomena in Icelandic syntax.

scholarly journals THE USE OF THE UAV IMAGES FOR THE BUILDING 3D MODEL GENERATION

2018 ◽  
Vol XLII-4/W8 ◽  
pp. 217-223 ◽  
Author(s):  
G. Vacca ◽  
G. Furfaro ◽  
A. Dessì
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
3D Model ◽  
Low Cost ◽  
Laser Scanner ◽  
3D Models ◽  
Digital Cameras ◽  
Dense Matching ◽  
Uav Images ◽  
The University

<p><strong>Abstract.</strong> The growing interest in recent years in Unmanned Aerial Vehicles (UAVs) by the scientific community, software developers, and geomatics professionals, has led these systems to be used more and more widely, in different fields of engineering and architecture. This is thanks, above all, to their flexibility of use and low cost compared to traditional photogrammetric flights using expensive metric digital cameras or LiDAR sensors. In recent years, UAVs have also been used in the field of monitoring and inspection of public or private buildings that are remarkable in terms of size and architecture. This is mainly due to the focus a sustainability and resource efficiency in the building and infrastructure sector, which aims to extend their lifetimes. Through the use of remote checking using UAVs, the monitoring and inspection of buildings can be brought to a new level of quality and saving.</p><p> This paper focuses on the processing and study of 3D models obtained from images captured by an UAV. In particular, the authors wanted to study the accuracy gains achieved in the building 3D model obtained with both nadir and oblique UAV flights. The images from the flights were processed using Structure-for Motion-based approach for point cloud generation using dense image-matching algorithms implemented in an open source software. We used the open source software VisualSfM, developed by Chanchang Wu in collaboration with the University of Washington and Google. The dense matching plug-in integrated in its interface, PMVS/CMVS, made by Yasutaka Furukawa, was employed to generate the dense cloud. The achieved results were compare with those gained by Photoscan software by Agisoft and with 3D model from the Terrestrial Laser Scanner (TLS) survey.</p>

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