Mathieu Brédif
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View article: Exact Computation for Robust 3D Polyhedral Interactive Modeling
Exact Computation for Robust 3D Polyhedral Interactive Modeling Open
International audience
View article: Radiometric Cross-Calibration of an Aerial Sensor with Satellite Top-of-Atmosphere Reflectance
Radiometric Cross-Calibration of an Aerial Sensor with Satellite Top-of-Atmosphere Reflectance Open
Surface reflectance (SR) is essential for many remote sensing applications, but retrieving it from aerial images is challenging due to the lack of in-flight radiometric calibration and varying acquisition conditions. We propose a novel met…
View article: Editing Watertight Manifold Polyhedra using Face Shifts with Automatic Topological Updates and Edge Flips
Editing Watertight Manifold Polyhedra using Face Shifts with Automatic Topological Updates and Edge Flips Open
In the context of urban 3D mapping, the 3D modelling step is a crucial operation, which can be very error prone, particularly when high fidelity and accuracy are required. While automatic reconstruction tools are way faster and less expens…
View article: Joint Inpainting of Depth and Reflectance with Visibility Estimation
Joint Inpainting of Depth and Reflectance with Visibility Estimation Open
This paper presents a novel strategy to generate, from 3-D lidar measures, dense depth and reflectance images coherent with given color images. It also estimates for each pixel of the input images a visibility attribute. 3-D lidar measures…
View article: ALEGORIA: Joint Multimodal Search and Spatial Navigation into the Geographic Iconographic Heritage
ALEGORIA: Joint Multimodal Search and Spatial Navigation into the Geographic Iconographic Heritage Open
International audience
View article: PROJECTIVE MULTITEXTURING OF CURRENT 3D CITY MODELS AND POINT CLOUDS WITH MANY HISTORICAL IMAGES
PROJECTIVE MULTITEXTURING OF CURRENT 3D CITY MODELS AND POINT CLOUDS WITH MANY HISTORICAL IMAGES Open
Iconographic image collections are a cultural heritage that could reach a larger audience by proposing their immersive presentation in a 3D web application. Proposing a historical street view application, based on these historical images, …
View article: Cluttering Reduction for Interactive Navigation and Visualization of Historical Images
Cluttering Reduction for Interactive Navigation and Visualization of Historical Images Open
Iconographic representations, such as historical photos of geographic spaces, are precious cultural heritage resources capable of describing a particular geographical area’s evolution over time. These photographic collections may vary in s…
View article: Efficiently Distributed Watertight Surface Reconstruction
Efficiently Distributed Watertight Surface Reconstruction Open
International audience
View article: Co-Visualization of Air Temperature and Urban Data for Visual Exploration
Co-Visualization of Air Temperature and Urban Data for Visual Exploration Open
International audience
View article: A SPATIO-TEMPORAL WEB APPLICATION FOR THE UNDERSTANDING OF THE FORMATION OF THE PARISIAN METROPOLIS
A SPATIO-TEMPORAL WEB APPLICATION FOR THE UNDERSTANDING OF THE FORMATION OF THE PARISIAN METROPOLIS Open
This article presents a spatio-temporal web application dedicated to the co-exploitation of heterogeneous data spatialized in a common 3D environment, providing several paradigms for supporting their co-visualization and interactions withi…
View article: VISUALIZING 3D CLIMATE DATA IN URBAN 3D MODELS
VISUALIZING 3D CLIMATE DATA IN URBAN 3D MODELS Open
In order to understand and explain urban climate, the visual analysis of urban climate data and their relationships with the urban morphology is at stake. This involves partly to co-visualize 3D field climate data, obtained from simulation…
View article: GEOMETRIC DISTORTION OF HISTORICAL IMAGES FOR 3D VISUALIZATION
GEOMETRIC DISTORTION OF HISTORICAL IMAGES FOR 3D VISUALIZATION Open
Archivists, historians and national mapping agencies, among others, are archiving large datasets of historical photographs. Nevertheless, the capturing devices used to acquire these images possessed a diversity of effects that influenced t…
View article: PROVABLY CONSISTENT DISTRIBUTED DELAUNAY TRIANGULATION
PROVABLY CONSISTENT DISTRIBUTED DELAUNAY TRIANGULATION Open
This paper deals with the distributed computation of Delaunay triangulations of massive point sets, mainly motivated by the needs of a scalable out-of-core surface reconstruction workflow from massive urban LIDAR datasets. Such a data ofte…
View article: Fast Image and LiDAR alignment based on 3D rendering in sensor topology
Fast Image and LiDAR alignment based on 3D rendering in sensor topology Open
Mobile Mapping Systems are now commonly used in large urban acquisition campaigns. They are often equiped with LiDAR sensors and optical cameras, providing very large multimodal datasets. The fusion of both modalities serves different purp…
View article: Tile & Merge: Distributed Delaunay Triangulations for Cloud Computing
Tile & Merge: Distributed Delaunay Triangulations for Cloud Computing Open
International audience
View article: LU-Net: An Efficient Network for 3D LiDAR Point Cloud Semantic Segmentation Based on End-to-End-Learned 3D Features and U-Net
LU-Net: An Efficient Network for 3D LiDAR Point Cloud Semantic Segmentation Based on End-to-End-Learned 3D Features and U-Net Open
We propose LU-Net -- for LiDAR U-Net, a new method for the semantic segmentation of a 3D LiDAR point cloud. Instead of applying some global 3D segmentation method such as PointNet, we propose an end-to-end architecture for LiDAR point clou…
View article: RIU-Net: Embarrassingly simple semantic segmentation of 3D LiDAR point cloud
RIU-Net: Embarrassingly simple semantic segmentation of 3D LiDAR point cloud Open
This paper proposes RIU-Net (for Range-Image U-Net), the adaptation of a popular semantic segmentation network for the semantic segmentation of a 3D LiDAR point cloud. The point cloud is turned into a 2D range-image by exploiting the topol…
View article: INTERACTIVE IMAGE GEOLOCALIZATION IN AN IMMERSIVE WEB APPLICATION
INTERACTIVE IMAGE GEOLOCALIZATION IN AN IMMERSIVE WEB APPLICATION Open
For a long time people have been interested in the past and history and how we can go back in time using a time machine. And while we cannot invent a time machine, at least not yet, we can create a virtual one. Our “virtual” time machine i…
View article: Visibility Estimation in Point Clouds with Variable Density
Visibility Estimation in Point Clouds with Variable Density Open
Estimating visibility in point clouds has many applications such as visualization, surface reconstruction and scene analysis through fusion of LiDAR point clouds and images. However, most current works rely on methods that require strong a…
View article: 3D URBAN GEOVISUALIZATION: IN SITU AUGMENTED AND MIXED REALITY EXPERIMENTS
3D URBAN GEOVISUALIZATION: IN SITU AUGMENTED AND MIXED REALITY EXPERIMENTS Open
In this paper, we assume that augmented reality (AR) and mixed reality (MR) are relevant contexts for 3D urban geovisualization, especially in order to support the design of the urban spaces. We propose to design an in situ MR application,…
View article: Range-Image: Incorporating Sensor Topology for Lidar Point Cloud Processing
Range-Image: Incorporating Sensor Topology for Lidar Point Cloud Processing Open
This paper proposes a novel methodology for LiDAR point cloud processing that takes advantage of the implicit topology of various LiDAR sensors to derive 2D images from the point cloud while bringing spatial structure to each point. The in…
View article: Expressive map design: OGC SLD/SE++ extension for expressive map styles
Expressive map design: OGC SLD/SE++ extension for expressive map styles Open
In the context of custom map design, handling more artistic and expressive tools has been identified as a carto-graphic need, in order to design stylized and expressive maps. Based on previous works on style formalization, an approach for …
View article: Constrained palette-space exploration
Constrained palette-space exploration Open
Color palettes are widely used by artists to define colors of artworks and explore color designs. In general, artists select the colors of a palette by following a set of rules, e.g. contrast or relative luminance. Existing interactive pal…
View article: DISOCCLUSION OF 3D LIDAR POINT CLOUDS USING RANGE IMAGES
DISOCCLUSION OF 3D LIDAR POINT CLOUDS USING RANGE IMAGES Open
This paper proposes a novel framework for the disocclusion of mobile objects in 3D LiDAR scenes aquired via street-based Mobile Mapping Systems (MMS). Most of the existing lines of research tackle this problem directly in the 3D space. Thi…
View article: A Classification-Segmentation Framework for the Detection of Individual Trees in Dense MMS Point Cloud Data Acquired in Urban Areas
A Classification-Segmentation Framework for the Detection of Individual Trees in Dense MMS Point Cloud Data Acquired in Urban Areas Open
In this paper, we present a novel framework for detecting individual trees in densely sampled 3D point cloud data acquired in urban areas. Given a 3D point cloud, the objective is to assign point-wise labels that are both class-aware and i…