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The reliability of RANSAC method when estimating the parameters of geometric object / Tilen Urbančič in Geodetski vestnik, vol 60 n° 1 (March - May 2016)  

Public [article]  inGeodetski vestnik > vol 60 n° 1 (March - May 2016) . - pp 69 - 97 Titre : The reliability of RANSAC method when estimating the parameters of geometric object Type de document : Article/Communication Auteurs : Tilen Urbančič, Auteur ; Anja Vrecko, Auteur ; Klemen Kregar, Auteur Année de publication : 2016 Article en page(s) : pp 69 - 97 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Algorithmique [Termes IGN] estimation des paramètres [Termes IGN] méthode fiable [Termes IGN] modèle mathématique [Termes IGN] Ransac (algorithme) [Termes IGN] résidu [Termes IGN] solide Résumé : (Auteur) The RANSAC (RANdom SAmple Consensus) is often used to identify points belonging to the objects whose shape can be modeled with geometric primitives. These points, called inliers, are of great interest in some applications but often the goal is also to estimate the parameters of geometric shape and their accuracies. The quality of RANSAC results is rarely analyzed. The accuracies of estimated parameters are usually calculated based only on the residuals of inliers, selected by RANSAC, from a mathematical model. However, the analysis does not indicate if the right points were selected. The result of RANSAC depends on the random selection of the minimum number of points that uniquely describe a mathematical model; in the case of multiple repetitions of the method, the results are not necessarily the same. This paper presents an analysis of RANSAC reliability based on repeating the selection of points from the point cloud by RANSAC one hundred times. A standard deviation of one hundred parameter values is used to estimate the parameters’ accuracies. An analysis is made for three different examples of geometric objects: a sphere, a cone, and a plane. Finally, we suggest repeating the algorithm several times and checking the consistency of the results to obtain a more reliable estimation of parameters and their accuracies. Numéro de notice : A2016-175 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.15292/geodetski-vestnik.2016.01.69-97 En ligne : http://dx.doi.org/10.15292/geodetski-vestnik.2016.01.69-97 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80520 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
139-2016011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Suburban design : from "Bedroom communities" to sustainable neighborhoods / Milena Dinić in Geodetski vestnik, vol 60 n° 1 (March - May 2016)  

Public [article]  inGeodetski vestnik > vol 60 n° 1 (March - May 2016) . - pp 98 - 113 Titre : Suburban design : from "Bedroom communities" to sustainable neighborhoods Type de document : Article/Communication Auteurs : Milena Dinić, Auteur ; Petar Mitković, Auteur Année de publication : 2016 Article en page(s) : pp 98 - 113 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] banlieue [Termes IGN] centre-ville [Termes IGN] croissance urbaine [Termes IGN] étalement urbain [Termes IGN] Serbie Résumé : (Auteur) One of the main issues in the current suburban development is mono-functionality. Suburban formats that mainly function as “bedroom communities” are large housing estates, urban sprawl and suburban satellite housing – former villages surrounding large socialist cities. This paper deals with some urban design principles which encourage unsustainable usage of land at the periphery of cities and cause the “bedroom community” phenomenon. A comparative analysis is performed of three suburban areas where the issue of mono-functionality was/ is present, located within the administrative area of the City of Niš, Serbia: large housing estate in Krive Livade neighbourhood, sprawling neighborhoods Podvinik and Vinik, and former rural settlements Donji Komren and Gornji Komren. The quality of urban design is evaluated using four criteria related to the physical and functional component of urban structure: central urban functions, population densities, public spaces adjacent to central urban functions, and neighborhood traffic. The initial hypothesis of this research is that the mono-functionality represents an unsustainable form of development and that the city needs a polycentric spatial structure. The traditional compact neighborhood with a center, which is pedestrian oriented and has a diversity of uses, is instated as a good quality urban area model. Numéro de notice : A2016-201 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.15292/geodetski-vestnik.2016.01.98-113 En ligne : http://dx.doi.org/10.15292/geodetski-vestnik.2016.01.98-113 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80522 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
139-2016011	RAB	Revue	Centre de documentation	En réserve L003	Disponible