scholarly journals REFINED SATELLITE IMAGE ORIENTATION IN THE FREE OPEN-SOURCE PHOTOGRAMMETRIC TOOLS APERO/MICMAC

2016 ◽  
Vol III-1 ◽  
pp. 83-90 ◽  
Author(s):  
E. Rupnik ◽  
M. Pierrot Deseilligny ◽  
A. Delorme ◽  
Y. Klinger
Keyword(s):  
Open Source ◽  
Satellite Image ◽  
Bundle Adjustment ◽  
Physical Constraint ◽  
Adjustment Model ◽  
Triplet Pair ◽  
Image Orientation ◽  
Free Open Source

This publication presents the RPC-based bundle adjustment implemented in the freeware open-source photogrammetric tool Apero/MicMac. The bundle adjustment model is based on some polynomial correction functions, enriched with a physical constraint that introduces the notion of a global sensor rotation into the model. The devised algorithms are evaluated against two datasets consisting of two stereo and a triplet pair of the Pleiades images. Two sets of correction functions and a number of GCPs configurations are examined. The obtained geo-referencing accuracy falls below the size of 1GSD.

scholarly journals REFINED SATELLITE IMAGE ORIENTATION IN THE FREE OPEN-SOURCE PHOTOGRAMMETRIC TOOLS APERO/MICMAC

2016 ◽  
Vol III-1 ◽  
pp. 83-90 ◽  
Author(s):  
E. Rupnik ◽  
M. Pierrot Deseilligny ◽  
A. Delorme ◽  
Y. Klinger
Keyword(s):  
Open Source ◽  
Satellite Image ◽  
Bundle Adjustment ◽  
Physical Constraint ◽  
Adjustment Model ◽  
Triplet Pair ◽  
Image Orientation ◽  
Free Open Source

This publication presents the RPC-based bundle adjustment implemented in the freeware open-source photogrammetric tool Apero/MicMac. The bundle adjustment model is based on some polynomial correction functions, enriched with a physical constraint that introduces the notion of a global sensor rotation into the model. The devised algorithms are evaluated against two datasets consisting of two stereo and a triplet pair of the Pleiades images. Two sets of correction functions and a number of GCPs configurations are examined. The obtained geo-referencing accuracy falls below the size of 1GSD.

scholarly journals UAV LINEAR PHOTOGRAMMETRY

2015 ◽  
Vol XL-3/W3 ◽  
pp. 327-333 ◽  
Author(s):  
V. Tournadre ◽  
M. Pierrot-Deseilligny ◽  
P. H. Faure
Keyword(s):  
Open Source ◽  
Ground Truth ◽  
3D Models ◽  
Bundle Adjustment ◽  
Acquisition Process ◽  
Calibration Models ◽  
All Solutions ◽  
Oblique Images ◽  
Free Open Source ◽  
Terrestrial Photogrammetry

The photogrammetric treatment of images acquired on a linear axis is a problematic case. Such tricky configurations often leads to bended 3D models, described as a bowl effect, which requires ground measurements to be fixed. This article presents different solutions to overcome that problem. All solutions have been implemented into the free open-source photogrammetric suite MicMac. The article presents the lasts evolutions of MicMac's bundle adjustment core, as well as some extended calibration models and how they fit for the camera evaluated. The acquisition process is optimized by presenting how oblique images can improve the accuracy of the orientations, while the 3D models accuracies are assessed by producing a millimeter accurate ground truth from terrestrial photogrammetry.

scholarly journals Short-term adoption rates for a web-based portal within the intranet of a hospital information system

2019 ◽  
Vol 26 (1) ◽  
pp. e100004 ◽  
Author(s):  
Athanasios Kotoulas ◽  
Ioannis Stratis ◽  
Theodoros Goumenidis ◽  
George Lambrou ◽  
Dimitrios - Dionysios Koutsouris
Keyword(s):  
Open Source ◽  
Resistance To Change ◽  
Content Management ◽  
Healthcare Management ◽  
Short Term ◽  
Web Based ◽  
Average Growth ◽  
Greek Hospital ◽  
Set Up ◽  
Free Open Source

ObjectiveAn intranet portal that combines cost-free, open-source software technology with easy set-up features can be beneficial for daily hospital processes. We describe the short-term adoption rates of a costless content management system (CMS) in the intranet of a tertiary Greek hospital.DesignDashboard statistics of our CMS platform were the implementation assessment of our system.ResultsIn a period of 10 months of running the software, the results indicate the employees overcame ‘Resistance to Change’ status. The average growth rate of end users who exploit the portal services is calculated as 2.73 every 3.3 months.ConclusionWe found our intranet web-based portal to be acceptable and helpful so far. Exploitation of an open-source CMS within the hospital intranet can influence healthcare management and the employees’ way of working as well.

scholarly journals Implementing ManPy, a Semantic-free Open-source Discrete Event Simulation Package, in a Job Shop

Procedia CIRP ◽  
2014 ◽  
Vol 25 ◽  
pp. 253-260 ◽  
Author(s):  
Oladipupo Olaitan ◽  
John Geraghty ◽  
Paul Young ◽  
Georgios Dagkakis ◽  
Cathal Heavey ◽  
...  
Keyword(s):  
Open Source ◽  
Discrete Event Simulation ◽  
Job Shop ◽  
Discrete Event ◽  
Event Simulation ◽  
Free Open Source ◽  
Simulation Package

scholarly journals Design of a Didactical Activity for the Analysis of Uncertainties in Thermography through the Use of Robust Statistics as Teacher-Oriented Approach

2021 ◽  
Vol 13 (3) ◽  
pp. 402
Author(s):  
Pablo Rodríguez-Gonzálvez ◽  
Manuel Rodríguez-Martín
Keyword(s):  
Open Source ◽  
Robust Statistics ◽  
Three Dimensional ◽  
Learning Material ◽  
Novel Approach ◽  
Learning Programs ◽  
Institutional Learning ◽  
Thermographic Image ◽  
Visualization Techniques ◽  
Free Open Source

The thermography as a methodology to quantitative data acquisition is not usually addressed in the degrees of university programs. The present manuscript proposes a novel approach for the acquisition of advanced competences in engineering courses associated with the use of thermographic images via free/open-source software solutions. This strategy is established from a research based on the statistical and three-dimensional visualization techniques over thermographic imagery to improve the interpretation and comprehension of the different sources of error affecting the measurements and, thereby, the conclusions and analysis arising from them. The novelty is focused on the detection of non-normalities in thermographic images, which is illustrates in the experimental section. Additionally, the specific workflow for the generation of learning material related with this aim is raised for asynchronous and e-learning programs. These virtual materials can be easily deployed in an institutional learning management system, allowing the students to work with the models by means of free/open-source solutions easily. Subsequently, the present approach will give new tools to improve the application of professional techniques, will improve the students’ critical sense to know how to interpret the uncertainties in thermography using a single thermographic image, therefore they will be better prepared to face future challenges with more critical thinking.

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