This study tackles the production of 3D realistic map databases for outdoor environments. An approach based on the fusion of heterogeneous 3D representations was studied. We propose a variant of ICP (Iterative Closest Point) based on an adaptive dynamic threshold and a RANSAC removing outliers process. An application of our approach was tested on two scenarios: a registration of point clouds obtained by a fixed terrestrial 3D Laser on a 2.5D data Digital Model of Surface (DSM), and the registration of point clouds obtained by a Mobile Mapping System (MMS) on DSM. The objective is to obtain coherence of a homogeneous 3D representation, which will be the input of the following processing step: 3D modeling. We treat various scenarios of registration which were specified; the algorithm exploits specific pre-processing dedicated to the studied use-cases.

ABSTRACT:The production of realistic 3D map databases is continuously growing. We studied an approach of 3D mapping database producing based on the fusion of heterogeneous 3D data. In this term, a rigid registration process was performed. Before starting the modeling process, we need to validate the quality of the registration results, and this is one of the most difficult and open research problems. In this paper, we suggest a new method of evaluation of 3D point clouds based on feature extraction and comparison with a 2D reference model. This method is based on tow metrics: binary and fuzzy.

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ABSTRACT:Heritage valorisation is one of the greatest challenges that face countries in preserving their own identity from the globalization process. One of those scientific areas which allow this valorisation to be more attractive and at its bravest is the augmented reality. In this paper, we present an innovative augmented reality telescope used by tourists to explore a panoramic view with optional zooming facility, allowing thereby an accurate access to heritage information. The telescope we produced is generic, ergonomic, extensible, and modular by nature. It is designed to be conveniently set up anywhere in the world. We improve the practical use of our system by testing it right in the heart of Paris within a specific use case.