We also describe their implementation within an object-relational DBMS.
At this end, we introduce the concept of measure profile to capture the measure variability in space, along with specific operations that permit to analyze the data. In this paper, we propose a new data model and a language that handle mobile location sensor data.
However, existing approaches manage only the location. Managing such data is of major interest for some applications such as analyzing driving behavior in road safety, or analyzing pollution by mean of mobile (vehicles or persons) probes. However, a moving object – such as a vehicle -could be equipped with sensors that report some measures related to its state or to its environment. A lot of work in moving object databases area dealt with modeling, querying and indexing. Nous décrivons également son implémentation au sein d'un SGBD objet-relationnel. Ce modèle est basé sur un concept de profil qui capture la variabilité spatiale d'une mesure. Nous proposons un nouveau modèle de données et un langage pour gérer et analyser les données issues de capteurs géolocalisés mobiles. Or, les approches existantes ne gèrent que la localisation. Gérer ces données est d'une importance majeure pour de nombreuses applications, telles que l'analyse du comportement des conducteurs en sécurité routière, ou l'analyse de pollution en utilisant des sondeurs (véhicules ou personnes) mobiles. Cependant, un objet mobile – tel qu'un véhicule – peut être muni de capteurs qui reportent différentes mesures relatives à son état ou à son environnement. De nombreux travaux dans le domaine des bases d'objets mobiles ont porté sur la modélisation, le langage de requêtes ou l'indexation. Confidence in each speed limit combined all these elements.Fusion of both sources with the Dempster-Shafer theory led to very good performances on our databases et showed the importance of all the used information. The sensor reliability was then computed and depended on the satellite configuration and the network digitisation quality. Urban context or not, functional class, road type and speed limit were collected and modelised into criteria. The objective was to extract from an embedded database the driving context related to the vehicle position. Finally, we eliminated subsigns which are not applicable to the current lane by considering markings.After having developed a vision module integrating all the available information, we improved the navigation system. Global descriptors such as PHOGs combined to a hierarchical structure of SVMs were then used to classify the output rectangles. A morphological reconstruction with a growing region helped us to focus the segmentation on highly contrasted pixels surrounded by homogeneous regions. We thus developped a subsign detection and classification module using greyscale images. Commercialised products are even implemented in vehicles. Many research were conducted during last years to recognise the first one, contrary to the second.
EXCES DE VITESSE EN FRANCE DRIVER
We proposed an approach combining vision and navigation in order to optimally manage the driving context information.Roadsigns, subsigns and markings are visual data used by the driver to determine the current temporary speed limitations. In this thesis, we focused on Intelligent Speed Adaptation.
EXCES DE VITESSE EN FRANCE DRIVERS
ADAS (Autonomous Driving Assistance Systems) are more and more integrated in vehicles and provide to drivers more confort and safety.
0 kommentar(er)
