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Publications de Florent Lafarge
Résultat de la recherche dans la liste des publications :
8 Articles |
1 - A Marked Point Process for Modeling Lidar Waveforms.
C. Mallet et F. Lafarge et M. Roux et U. Soergel et F. Bretar et C. Heipke. IEEE Trans. Image Processing, 19(12): pages 3204-3221, décembre 2010.
Mots-clés : Clustering algorithms, Image color analysis, Image edge detection, Image segmentation, Monte Carlo Sampling, Object-based stochastic model.
@ARTICLE{mallet_tip2010,
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{A Marked Point Process for Modeling Lidar Waveforms}, |
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| } |
Abstract :
Lidar waveforms are 1D signals representing a train of echoes caused by reflections at different targets. Modeling these echoes with the appropriate parametric function is useful to retrieve information about the physical characteristics of the targets. This paper presents a new probabilistic model based on a marked point process which reconstructs the echoes from recorded discrete waveforms as a sequence of parametric curves. Such an approach allows to fit each mode of a waveform with the most suitable function and to deal with both, symmetric and asymmetric, echoes. The model takes into account a data term, which measures the coherence between the models and the waveforms, and a regularization term, which introduces prior knowledge on the reconstructed signal. The exploration of the associated configuration space is performed by a Reversible Jump Markov Chain Monte Carlo sampler coupled with simulated annealing. Experiments with different kinds of lidar signals, especially from urban scenes, show the high potential of the proposed approach. To further demonstrate the advantages of the suggested method, actual laser scans are classified and the results are reported. |
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2 - Geometric Feature Extraction by a Multi-Marked Point Process .
F. Lafarge et G. Gimel'farb et X. Descombes. IEEE Trans. Pattern Analysis and Machine Intelligence, 32(9): pages 1597-1609, septembre 2010.
Mots-clés : Shape extraction, Spatial point process, Geometrie stochastique, fast optimization, Texture, remote sensing.
@ARTICLE{pami09b_lafarge,
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{Geometric Feature Extraction by a Multi-Marked Point Process }, |
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{Shape extraction, Spatial point process, Geometrie stochastique, fast optimization, Texture, remote sensing} |
| } |
Abstract :
This paper presents a new stochastic marked point process for describing images in terms of a finite library of geometric objects. Image analysis based on conventional marked point processes has already produced convincing results but at the expense of parameter tuning, computing time, and model specificity. Our more general multimarked point process has simpler parametric setting, yields notably shorter computing times, and can be applied to a variety of applications. Both linear and areal primitives extracted from a library of geometric objects are matched to a given image using a probabilistic Gibbs model, and a Jump-Diffusion process is performed to search for the optimal object configuration. Experiments with remotely sensed images and natural textures show that the proposed approach has good potential. We conclude with a discussion about the insertion of more complex object interactions in the model by studying the compromise between model complexity and efficiency. |
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3 - Insertion of 3D-primitives in mesh-based representations: Towards compact models preserving the details.
F. Lafarge et R. Keriven et M. Brédif. IEEE Trans. Image Processing, 19(7): pages 1683-1694, juillet 2010.
Mots-clés : 3-D reconstruction, Graph-cut , Shape extraction, urban scenes.
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{3-D reconstruction, Graph-cut , Shape extraction, urban scenes} |
| } |
Abstract :
We propose an original hybrid modeling process of urban scenes that represents 3-D models as a combination of mesh-based surfaces and geometric 3-D-primitives. Meshes describe details such as ornaments and statues, whereas 3-D-primitives code for regular shapes such as walls and columns. Starting from an 3-D-surface obtained by multiview stereo techniques, these primitives are inserted into the surface after being detected. This strategy allows the introduction of semantic knowledge, the simplification of the modeling, and even correction of errors generated by the acquisition process. We design a hierarchical approach exploring different scales of an observed scene. Each level consists first in segmenting the surface using a multilabel energy model optimized by -expansion and then in fitting 3-D-primitives such as planes, cylinders or tori on the obtained partition where relevant. Experiments on real meshes, depth maps and synthetic surfaces show good potential for the proposed approach. |
|
4 - Structural approach for building reconstruction from a single DSM.
F. Lafarge et X. Descombes et J. Zerubia et M. Pierrot-Deseilligny. IEEE Trans. Pattern Analysis and Machine Intelligence, 32(1): pages 135-147, janvier 2010.
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{Structural approach for building reconstruction from a single DSM}, |
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{IEEE Trans. Pattern Analysis and Machine Intelligence}, |
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Abstract :
We present a new approach for building reconstruction from a single Digital Surface Model (DSM). It treats buildings as an assemblage of simple urban structures extracted from a library of 3D parametric blocks (like a LEGO set). First, the 2D-supports of the urban structures are extracted either interactively or automatically. Then, 3D-blocks are placed on the 2D-supports using a Gibbs model which controls both the block assemblage and the fitting to data. A Bayesian decision finds the optimal configuration of 3D--blocks using a Markov Chain Monte Carlo sampler associated with original proposition kernels. This method has been validated on multiple data set in a wide-resolution interval such as 0.7 m satellite and 0.1 m aerial DSMs, and provides 3D representations on complex buildings and dense urban areas with various levels of detail. |
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5 - Automatic Building Extraction from DEMs using an Object Approach and Application to the 3D-city Modeling.
F. Lafarge et X. Descombes et J. Zerubia et M. Pierrot-Deseilligny. Journal of Photogrammetry and Remote Sensing, 63(3): pages 365-381, mai 2008.
Mots-clés : Building extraction, Reconstruction en 3D, Digital Elevation Model, Geometrie stochastique.
@ARTICLE{lafarge_jprs08,
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{Lafarge, F. and Descombes, X. and Zerubia, J. and Pierrot-Deseilligny, M.}, |
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{Automatic Building Extraction from DEMs using an Object Approach and Application to the 3D-city Modeling}, |
| year |
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{2008}, |
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{Journal of Photogrammetry and Remote Sensing}, |
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{365-381}, |
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{Building extraction, Reconstruction en 3D, Digital Elevation Model, Geometrie stochastique} |
| } |
Abstract :
In this paper, we present an automatic building extraction method from Digital Elevation Models based on an object approach.
First, a rough approximation of the building footprints is realized by a method based on marked point processes: the building
footprints are modeled by rectangle layouts. Then, these rectangular footprints are regularized by improving the connection
between the neighboring rectangles and detecting the roof height discontinuities. The obtained building footprints are structured
footprints: each element represents a specific part of an urban structure. Results are finally applied to a 3D-city modeling process. |
|
6 - Détection de feux de forêt par analyse statistique d'évènements rares à partir d'images infrarouges thermiques.
F. Lafarge et X. Descombes et J. Zerubia et S. Mathieu. Traitement du Signal, 24(1), 2007.
Note : copyright Traitement du Signal
Mots-clés : Champs Gaussiens, Évenement rare, DT-caracteristic, Pic d'intensite.
@ARTICLE{lafarge_ts06,
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| author |
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{Lafarge, F. and Descombes, X. and Zerubia, J. and Mathieu, S.}, |
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{Détection de feux de forêt par analyse statistique d'évènements rares à partir d'images infrarouges thermiques}, |
| year |
= |
{2007}, |
| journal |
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{Traitement du Signal}, |
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{24}, |
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{Champs Gaussiens, Évenement rare, DT-caracteristic, Pic d'intensite} |
| } |
|
7 - Automatic building 3D reconstruction from DEMs.
F. Lafarge et X. Descombes et J. Zerubia et M. Pierrot-Deseilligny. Revue Française de Photogrammétrie et de Télédétection (SFPT), 184: pages 48--53, 2006.
Mots-clés : 3D-reconstruction, Digital Elevation Model, Building extraction, dense urban areas.
@ARTICLE{lafarge_sfpt06,
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| author |
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{Lafarge, F. and Descombes, X. and Zerubia, J. and Pierrot-Deseilligny, M.}, |
| title |
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{Automatic building 3D reconstruction from DEMs}, |
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{2006}, |
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{Revue Française de Photogrammétrie et de Télédétection (SFPT)}, |
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{http://isprs.free.fr/documents/Papers/T07-32.pdf}, |
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{3D-reconstruction, Digital Elevation Model, Building extraction, dense urban areas} |
| } |
Abstract :
This paper is about an example of PLEIADES applications, the 3D building reconstruction. The future PLEIADES satellites are
especially well adapted to deal with 3D building reconstruction through the sub-metric resolution of images and its stereoscopic characteristics. We propose a fully automatic 3D-city model of dense urban areas using a parametric approach. First, a Digital Elevation
Model (DEM) is generated using an algorithm based on a maximum-flow formulation using three views. Then, building footprints are extracted from the DEM through an automatic method based on marked point processes : they are represented by an association of rectangles that we regularize by improving the connection of the neighboring rectangles and the facade discontinuity detection. Finally, a 3D-reconstruction method based on a skeleton process which allows to model the rooftops is proposed from the DEM and the building footprints. The different building heights constitute parameters which are estimated and then regularized by the ”K-means” algorithm including an entropy term. |
|
8 - Modèle Paramétrique pour la Reconstruction Automatique en 3D de Zones Urbaines Denses à partir d'Images Satellitaires Haute Résolution.
F. Lafarge et X. Descombes et J. Zerubia et M. Pierrot-Deseilligny. Revue Française de Photogrammétrie et de Télédétection (SFPT), 180: pages 4--12, 2005.
Mots-clés : Reconstruction en 3D, Zones urbaines, Approche bayésienne, MCMC, Imagerie satellitaire.
Copyright : SFPT
@ARTICLE{lafarge_sfpt05,
|
| author |
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{Lafarge, F. and Descombes, X. and Zerubia, J. and Pierrot-Deseilligny, M.}, |
| title |
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{Modèle Paramétrique pour la Reconstruction Automatique en 3D de Zones Urbaines Denses à partir d'Images Satellitaires Haute Résolution}, |
| year |
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{2005}, |
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{Revue Française de Photogrammétrie et de Télédétection (SFPT)}, |
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{180}, |
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{4--12}, |
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{Reconstruction en 3D, Zones urbaines, Approche bayésienne, MCMC, Imagerie satellitaire} |
| } |
|
 haut de la page
Thèse de Doctorat et Habilitation |
1 - Modèles stochastiques pour la reconstruction tridimensionnelle d'environnements urbains.
F. Lafarge. Thèse de Doctorat, Ecole des Mines de Paris, octobre 2007.
Mots-clés : Reconstruction en 3D, Zones urbaines, Imagerie satellitaire, Approche structurelle, Recuit Simule, MCMC.
@PHDTHESIS{lafarge_phd07,
|
| author |
= |
{Lafarge, F.}, |
| title |
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{Modèles stochastiques pour la reconstruction tridimensionnelle d'environnements urbains}, |
| year |
= |
{2007}, |
| month |
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{octobre}, |
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{Ecole des Mines de Paris}, |
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{http://tel.archives-ouvertes.fr/tel-00179695/en/}, |
| keyword |
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{Reconstruction en 3D, Zones urbaines, Imagerie satellitaire, Approche structurelle, Recuit Simule, MCMC} |
| } |
Résumé :
Cette thèse aborde le problème de la reconstruction tridimensionnelle de zones urbaines à partir d'images satellitaires très haute résolution. Le contenu informatif de ce type de données est insuffisant pour permettre une utilisation efficace des nombreux algorithmes développés pour des données aériennes. Dans ce contexte, l'introduction de connaissances a priori fortes sur les zones urbaines est nécessaire. Les outils stochastiques sont particulièrement bien adaptés pour traiter cette problématique.
Nous proposons une approche structurelle pour aborder ce sujet. Cela consiste à modéliser un bâtiment comme un assemblage de modules urbains élémentaires extraits d'une bibliothèque de modèles 3D paramétriques. Dans un premier temps, nous extrayons les supports 2D de ces modules à partir d'un Modèle Numérique d' Elévation (MNE). Le résultat est un agencement de quadrilatères dont les éléments voisins sont connectés entre eux. Ensuite, nous reconstruisons les bâtiments en recherchant la configuration optimale de modèles 3D se fixant sur les supports précédemment extraits. Cette configuration correspond à la réalisation qui maximise une densité mesurant la cohérence entre la réalisation et le MNE, mais également prenant en compte des connaissances a priori telles que des lois d'assemblage des modules. Nous discutons enfin de la pertinence de cette approche en analysant les résultats obtenus à partir de données satellitaires (simulations PLEIADES). Des expérimentations sont également réalisées à partir d'images aériennes mieux résolues. |
|
haut de la page
18 Articles de conférence |
1 - Building large urban environments from unstructured point data.
F. Lafarge et C. Mallet. Dans Proc. IEEE International Conference on Computer Vision (ICCV), Barcelona, Spain, novembre 2011.
@INPROCEEDINGS{lafarge_iccv11,
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2 - Generating compact meshes under planar constraints: an automatic approach for modeling buildings lidar.
Y. Verdié et F. Lafarge et J. Zerubia. Dans Proc. IEEE International Conference on Image Processing (ICIP), Brussels, Belgium, septembre 2011.
Mots-clés : 3D-Modeling, shape analysis, Mesh processing.
@INPROCEEDINGS{VerdieICIP11,
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{Generating compact meshes under planar constraints: an automatic approach for modeling buildings lidar}, |
| year |
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{2011}, |
| month |
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{septembre}, |
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{Proc. IEEE International Conference on Image Processing (ICIP)}, |
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{Brussels, Belgium}, |
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{http://hal.inria.fr/inria-00605623/fr/}, |
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| } |
Abstract :
We present an automatic approach for modeling buildings from aerial LiDAR data. The method produces accurate, watertight and compact meshes under planar constraints which are especially designed for urban scenes. The LiDAR point cloud is classified through a non-convex energy minimization problem in order to separate the points labeled as building. Roof structures are then extracted from this point subset, and used to control the meshing procedure. Experiments highlight the potential of our method in term of minimal rendering, accuracy and compactness |
|
3 - Hybrid Multi-view Reconstruction by Jump-Diffusion.
F. Lafarge et R. Keriven et M. Brédif et H. Vu. Dans Proc. IEEE Computer Vision and Pattern Recognition (CVPR), San Franscico, U.S., juin 2010.
@INPROCEEDINGS{lafarge_cvpr10,
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{Hybrid Multi-view Reconstruction by Jump-Diffusion}, |
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{} |
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|
4 - Combining meshes and geometric primitives for accurate and semantic modeling.
F. Lafarge et R. Keriven et M. Brédif. Dans Proc. British Machine Vision Conference (BMVC), London, U.K., novembre 2009.
@INPROCEEDINGS{lafarge_bmvc09,
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|
5 - Lidar Waveform Modeling using a Marked Point Process.
C. Mallet et F. Lafarge et F. Bretar et U. Soergel et C. Heipke. Dans Proc. IEEE International Conference on Image Processing (ICIP), Cairo, Egypt, novembre 2009.
Mots-clés : 3D point cloud, Lidar, Marked point process, RJMCMC.
@INPROCEEDINGS{mallet_icip09,
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{Mallet, C. and Lafarge, F. and Bretar, F. and Soergel, U. and Heipke, C.}, |
| title |
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{Lidar Waveform Modeling using a Marked Point Process}, |
| year |
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{2009}, |
| month |
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{novembre}, |
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{Proc. IEEE International Conference on Image Processing (ICIP)}, |
| address |
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{Cairo, Egypt}, |
| url |
= |
{http://dx.doi.org/10.1109/ICIP.2009.5413380}, |
| keyword |
= |
{3D point cloud, Lidar, Marked point process, RJMCMC} |
| } |
Abstract :
Lidar waveforms are 1D signal consisting of a train of echoes where each of them correspond to a scattering target of the Earth surface. Modeling these echoes with the appropriate parametric function is necessary to retrieve physical information about these objects and characterize their properties. This paper presents a marked point process based model to reconstruct a lidar signal in terms of a set of parametric functions. The model takes into account both a data term which measures the coherence between the models and the waveforms, and a regularizing term which introduces physical knowledge on the reconstructed signal. We search for the best configuration of functions by performing a Reversible Jump Markov Chain Monte Carlo sampler coupled with a simulated annealing. Results are finally presented on different kinds of signals in urban areas. |
|
6 - Texture representation by geometric objects using a jump-diffusion process.
F. Lafarge et G. Gimel'farb. Dans Proc. British Machine Vision Conference (BMVC), Leeds, U.K., novembre 2008.
@INPROCEEDINGS{lafarge_bmvc08,
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{Texture representation by geometric objects using a jump-diffusion process}, |
| year |
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{Proc. British Machine Vision Conference (BMVC)}, |
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|
7 - A Geometric Primitive Extraction Process for Remote Sensing Problems..
F. Lafarge et G. Gimel'farb et X. Descombes. Dans Proc. Advanced Concepts for Intelligent Vision Systems, pages 518-529, Juan-les-Pins, France, octobre 2008.
Copyright :
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{A Geometric Primitive Extraction Process for Remote Sensing Problems.}, |
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8 - A new computationally efficient stochastic approach for building reconstruction from satellite data.
F. Lafarge et M. Durupt et X. Descombes et J. Zerubia et M. Pierrot-Deseilligny. Dans XXI ISPRS Congress, Part A, Beijing, China, juillet 2008.
Note : Copyright ISPRS
Mots-clés : Reconstruction en 3D, Building, satellite data, stochastic approach, jump process.
@INPROCEEDINGS{lafarge_isprs08,
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| author |
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{Lafarge, F. and Durupt, M. and Descombes, X. and Zerubia, J. and Pierrot-Deseilligny, M.}, |
| title |
= |
{A new computationally efficient stochastic approach for building reconstruction from satellite data}, |
| year |
= |
{2008}, |
| month |
= |
{juillet}, |
| booktitle |
= |
{XXI ISPRS Congress, Part A}, |
| address |
= |
{Beijing, China}, |
| note |
= |
{Copyright ISPRS}, |
| url |
= |
{http://www.isprs.org/proceedings/XXXVII/congress/3_pdf/40.pdf}, |
| keyword |
= |
{Reconstruction en 3D, Building, satellite data, stochastic approach, jump process} |
| } |
|
9 - Building reconstruction from a single DEM.
F. Lafarge et X. Descombes et J. Zerubia et M. Pierrot-Deseilligny. Dans Proc. IEEE Computer Vision and Pattern Recognition (CVPR), Anchorage, Alaska, U.S., juin 2008.
@INPROCEEDINGS{lafarge_cvpr08,
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{Lafarge, F. and Descombes, X. and Zerubia, J. and Pierrot-Deseilligny, M.}, |
| title |
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{Building reconstruction from a single DEM}, |
| year |
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{2008}, |
| month |
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{juin}, |
| booktitle |
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{Proc. IEEE Computer Vision and Pattern Recognition (CVPR)}, |
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|
10 - Automatic 3D modeling of urban scenes from satellite images.
F. Lafarge et X. Descombes et J. Zerubia et M. Pierrot-Deseilligny. Dans Proc. SPACEAPPLI, Toulouse, France, avril 2008.
@INPROCEEDINGS{lafarge_spaceappli08,
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{Lafarge, F. and Descombes, X. and Zerubia, J. and Pierrot-Deseilligny, M.}, |
| title |
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{Automatic 3D modeling of urban scenes from satellite images}, |
| year |
= |
{2008}, |
| month |
= |
{avril}, |
| booktitle |
= |
{Proc. SPACEAPPLI}, |
| address |
= |
{Toulouse, France}, |
| url |
= |
{http://www.toulousespaceshow.eu/tss08/spaceappli08/index.htm}, |
| keyword |
= |
{} |
| } |
|
11 - Forest Fire Detection based on Gaussian field analysis.
F. Lafarge et X. Descombes et J. Zerubia. Dans Proc. European Signal Processing Conference (EUSIPCO), Poznan, Poland, septembre 2007.
Note : Copyright EURASIP
Mots-clés : Champs Gaussiens, DT-caracteristic, Feux de foret.
@INPROCEEDINGS{lafarge_eusipco07,
|
| author |
= |
{Lafarge, F. and Descombes, X. and Zerubia, J.}, |
| title |
= |
{Forest Fire Detection based on Gaussian field analysis}, |
| year |
= |
{2007}, |
| month |
= |
{septembre}, |
| booktitle |
= |
{Proc. European Signal Processing Conference (EUSIPCO)}, |
| address |
= |
{Poznan, Poland}, |
| note |
= |
{Copyright EURASIP}, |
| pdf |
= |
{ftp://ftp-sop.inria.fr/ariana/Articles/2007_lafarge_eusipco07.pdf}, |
| keyword |
= |
{Champs Gaussiens, DT-caracteristic, Feux de foret} |
| } |
|
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