Frédéric Bretar
Institut géographique national
35 Papers
169 Citations
Frédéric Bretar is an academic researcher from Institut géographique national. The author has contributed to research in topics: Lidar & Point cloud. The author has an hindex of 15, co-authored 35 publications.
Chat about Author
Papers
Full-waveform topographic lidar : State-of-the-art
Clément Mallet,Frédéric Bretar +1 more
TL;DR: A survey of the literature related to airborne laser scanning techniques, with emphasis on the new sensors called full-waveform lidar systems, is presented, with special interest on vegetated and urban areas.
860
3-D mapping of a multi-layered Mediterranean forest using ALS data
Antonio Ferraz,Antonio Ferraz,Frédéric Bretar,Stéphane Jacquemoud,Gil Gonçalves,Luísa Pereira,Margarida Tomé,Paula Soares +7 more
TL;DR: In this paper, a robust approach for characterization of multi-layered forests using airborne laser scanning (ALS) data is presented, which relies on a single biophysically meaningful parameter, which is related to the local forest structure.
217
Advanced full-waveform lidar data echo detection: Assessing quality of derived terrain and tree height models in an alpine coniferous forest
Adrien Chauve,Cédric Vega,Sylvie Durrieu,Frédéric Bretar,Tristan Allouis,M. Pierrot Deseilligny,William Puech +6 more
TL;DR: In this article, the authors presented a new processing method based on the decomposition of waveforms into a sum of parametric functions, which consists of an enhanced peak detection algorithm combined with advanced echo modeling including Gaussian and generalized Gaussian models.
Analysis of full-waveform lidar data for classification of urban areas
Clément Mallet,Uwe Soergel,Frédéric Bretar +2 more
- 14 Jul 2008
TL;DR: Results show that it is possible to partition urban areas in building, vegetation, natural ground and artificial ground regions with high accuracy using only lidar waveforms.
107
An advanced photogrammetric method to measure surface roughness: Application to volcanic terrains in the Piton de la Fournaise, Reunion Island
Frédéric Bretar,Melanie Arab-Sedze,Jean Champion,Marc Pierrot-Deseilligny,Essam Heggy,Stéphane Jacquemoud +5 more
TL;DR: In this article, a rapid in situ photogrammetric method is presented to characterize surface roughness by taking overlapping photographs of a scene, using a single digital camera to create a high-resolution digital terrain model (pixel size of ~ 1.32mm) by means of a free open-source stereovision software.
87