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ICARE: A physically-based model to correct atmospheric and geometric effects from high spatial and spectral remote sensing images over 3D urban areas / Sophie Lacherade in Meteorology and Atmospheric Physics, vol 102 n° 3-4 (December 2008)  

Public [article]  inMeteorology and Atmospheric Physics > vol 102 n° 3-4 (December 2008) . - pp 209 - 222 Titre : ICARE: A physically-based model to correct atmospheric and geometric effects from high spatial and spectral remote sensing images over 3D urban areas Type de document : Article/Communication Auteurs : Sophie Lacherade, Auteur ; Christophe Miesch, Auteur ; Didier Boldo , Auteur ; Xavier Briottet , Auteur ; Christophe Valorge, Auteur ; Hervé Le Men , Auteur Année de publication : 2008 Article en page(s) : pp 209 - 222 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] correction d'image [Termes IGN] image aérienne [Termes IGN] image PELICAN [Termes IGN] modèle de transfert radiatif [Termes IGN] modèle physique [Termes IGN] radiance [Termes IGN] réflectance du sol [Termes IGN] scène urbaine [Termes IGN] Toulouse [Termes IGN] zone urbaine Résumé : (auteur) Automatic mapping of urban materials from remotely sensed radiance images remains difficult because of the complex phenomena induced by relief. Indeed, shadows and environment effects disrupt the radiance reaching the sensor. The measured radiance also depends on the illumination conditions of the observed area. This paper describes a new physical model, ICARE, able to solve the radiative transfer inversion problem in urban areas, in the reflective domain (0.4–2.5 µm), from high spatial and spectral resolution images. This new approach takes into account the relief, the spatial heterogeneity of the scene and atmospheric effects, in order to extract rigorously the ground surface reflectance. The resolution method consists of modelling separately the irradiance and radiance components at ground and sensor levels. Three input data are required to solve this inverse problem: atmospheric parameters (aerosol type and visibility), 3D digital vector models of the scene, and spectral at-sensor calibrated images of the scene. The validation of ICARE is checked through the CAPITOUL field campaign, carried out over Toulouse (France). Measurements were performed using two airborne Pelican image systems consisting of 8 high spatial (20 cm) and spectral (30 nm) resolution cameras. Results are presented over typical urban structures in Toulouse center. ICARE performance is expected to be better than 0.04 in the reflectance retrieval, even in shadowed areas. To quantify the gain brought by ICARE, a comparison between classification based on radiance and retrieved reflectance images, obtained by inversion, is introduced. The results show that the classification is improved from 54% for a flat ground assumption to 74% using ICARE. Numéro de notice : A2008-658 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00703-008-0316-5 Date de publication en ligne : 20/10/2008 En ligne : http://dx.doi.org/10.1007/s00703-008-0316-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99552 [article]

Development of an inversion code, ICARE, able to extract urban areas ground reflectance / Sophie Lacherade (2007)  

Public Titre : Development of an inversion code, ICARE, able to extract urban areas ground reflectance Type de document : Article/Communication Auteurs : Sophie Lacherade, Auteur ; Christophe Miesch, Auteur ; Didier Boldo , Auteur ; Xavier Briottet , Auteur ; Christophe Valorge, Auteur ; Hervé Le Men , Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2007 Collection : International Archives of Photogrammetry and Remote Sensing, ISSN 0252-8231 num. 36-7/C50 Conférence : ISPMSRS 2007, ISPRS Working Group VII/1 Workshop, Physical Measurements and Signatures in Remote Sensing 12/03/2007 14/03/2007 Davos Suisse ISPRS OA Archives Importance : 6 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] image aérienne [Termes IGN] image PELICAN [Termes IGN] modèle de transfert radiatif [Termes IGN] modèle physique [Termes IGN] radiance [Termes IGN] réflectance du sol [Termes IGN] Toulouse [Termes IGN] zone urbaine Résumé : (auteur) Automatic mapping of urban materials from remotely sensed radiance images remains difficult because of the complex physical phenomena induced by relief. Indeed, shadows and environment effects disrupt the radiance incoming the sensor. Moreover, the measured radiance depends on the illumination conditions of the observed area. This is quite problematic for multi-temporal analysis. Images are often taken in different illumination conditions thus shadows are not located in the same place. This paper describes a new physical model, ICARE, able to solve the radiative transfer inversion problem over urban areas, in the reflective domain (0.4 μm – 2.5 μm), from high spatial and spectral resolution images. This new approach takes into account the complex relief of 3D structures, the spatial heterogeneity of the scene and atmospheric effects, in order to extract rigorously the ground surface reflectance, even in shadows areas. The resolution method consists in modelling separately the irradiance and radiance components at ground and sensor levels. The validation of ICARE is checked through the CAPITOUL trial, carried out in Toulouse (France, 2004). Measurements were performed using two airborne Pelican image systems consisting in 8 high spatial (20 cm) and spectral (30 nm) resolution cameras. Results are presented over typical urban structures in Toulouse center completed by an error budget. They demonstrate that extracted reflectances correspond very well to ground re flectance measurements. Moreover, there is a good continuity between reflectance obtained over sunny and shadowed materials. That proves that shadows areas and environment effects are well corrected. To quantify the gain brought by ICARE, a comparison between classification based on radiance and reflectance images, obtained by inversion, is introduced. Numéro de notice : C2007-041 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : https://www.isprs.org/proceedings/xxxvi/7-C50/papers/P13.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99562

Scale sets image analysis / Laurent Guigues in International journal of computer vision, vol 68 n°3 (July 2006)  

Public [article]  inInternational journal of computer vision > vol 68 n°3 (July 2006) . - pp 289 - 317 Titre : Scale sets image analysis Type de document : Article/Communication Auteurs : Laurent Guigues , Auteur ; Jean-Pierre Cocquerez, Auteur ; Hervé Le Men , Auteur Année de publication : 2006 Article en page(s) : pp 289 - 317 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] géométrie de l'image [Termes IGN] méthode de réduction d'énergie [Termes IGN] partitionnement [Termes IGN] programmation dynamique [Termes IGN] représentation multiple [Termes IGN] segmentation d'image Résumé : (auteur) This paper introduces a multi-scale theory of piecewise image modelling, called the scale-sets theory, and which can be regarded as a region-oriented scale-space theory. The first part of the paper studies the general structure of a geometrically unbiased region-oriented multi-scale image description and introduces the scale-sets representation, a representation which allows to handle such a description exactly. The second part of the paper deals with the way scale-sets image analyses can be built according to an energy minimization principle. We consider a rather general formulation of the partitioning problem which involves minimizing a two-term-based energy, of the form λC + D, where D is a goodness-of-fit term and C is a regularization term. We describe the way such energies arise from basic principles of approximate modelling and we relate them to operational rate/distorsion problems involved in lossy compression problems. We then show that an important subset of these energies constitutes a class of multi-scale energies in that the minimal cut of a hierarchy gets coarser and coarser as parameter λ increases. This allows us to devise a fast dynamic-programming procedure to find the complete scale-sets representation of this family of minimal cuts. Considering then the construction of the hierarchy from which the minimal cuts are extracted, we end up with an exact and parameter-free algorithm to build scale-sets image descriptions whose sections constitute a monotone sequence of upward global minima of a multi-scale energy, which is called the “scale climbing” algorithm. This algorithm can be viewed as a continuation method along the scale dimension or as a minimum pursuit along the operational rate/distorsion curve. Furthermore, the solution verifies a linear scale invariance property which allows to completely postpone the tuning of the scale parameter to a subsequent stage. For computational reasons, the scale climbing algorithm is approximated by a pair-wise region merging scheme: however the principal properties of the solutions are kept. Some results obtained with Mumford-Shah’s piece-wise constant model and a variant are provided and different applications of the proposed multi-scale analyses are finally sketched. Numéro de notice : A2006-660 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Article DOI : 10.1007/s11263-005-6299-0 Date de publication en ligne : 01/04/2006 En ligne : http://doi.org/10.1007/s11263-005-6299-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86514 [article]

An inverse radiative transfer model to extract ground spectral reflectance of urban areas / Sophie Lacherade (2006)  

Public Titre : An inverse radiative transfer model to extract ground spectral reflectance of urban areas Type de document : Article/Communication Auteurs : Sophie Lacherade, Auteur ; Christophe Miesch, Auteur ; Didier Boldo , Auteur ; Xavier Briottet , Auteur ; Hervé Le Men , Auteur ; Christophe Valorge, Auteur Editeur : Paris : Institut Géographique National - IGN (1940-2007) Année de publication : 2006 Conférence : EARSEL 2006, 1st workshop of the EARSel Special Interest Group Urban Remote Sensing : Urban remote sensing, Challenges & Solutions 02/03/2006 03/03/2006 Berlin Allemagne ISPRS OA Archives Note générale : bibliographie communication dans le cadre de sa thèse sous la direction d'Hervé Le Men Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] modèle de transfert radiatif [Termes IGN] problème inverse [Termes IGN] réflectance de surface [Termes IGN] zone urbaine Numéro de notice : C2006-051 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Communication DOI : sans En ligne : http://recherche.ign.fr/labos/matis/pdf/articles_conf/2006/2006_earsel_lacherade [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103482

Spectral variability and bidirectional reflectance behaviour of urban materials at a 20 cm spatial resolution in the visible and near‐infrared wavelengths. A case study over Toulouse (France) / Sophie Lacherade in International Journal of Remote Sensing IJRS, vol 26 n° 17 (September 2005)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 26 n° 17 (September 2005) . - pp 3859 - 3866 Titre : Spectral variability and bidirectional reflectance behaviour of urban materials at a 20 cm spatial resolution in the visible and near‐infrared wavelengths. A case study over Toulouse (France) Type de document : Article/Communication Auteurs : Sophie Lacherade, Auteur ; Christophe Miesch, Auteur ; Xavier Briottet , Auteur ; Hervé Le Men , Auteur Année de publication : 2005 Article en page(s) : pp 3859 - 3866 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] rayonnement lumineux [Termes IGN] rayonnement proche infrarouge [Termes IGN] réflectance directionnelle [Termes IGN] réflectance urbaine [Termes IGN] scène urbaine [Termes IGN] Toulouse [Termes IGN] zone urbaine Résumé : (auteur) This letter presents an experiment carried out in Toulouse in May 2004 to study the spectral variability and bidirectional reflectance behaviour of urban materials. The measurements were carried out at a 20 cm spatial resolution in the visible and near‐infrared (350–2500 nm). These measurements allow quantification of three main types of reflectance spatial variability. In addition to these in situ experiments, the bidirectional properties of urban material samples were studied in the laboratory with a goniometer. Numéro de notice : A2005-613 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500177414 Date de publication en ligne : 12/04/2011 En ligne : https://doi.org/10.1080/01431160500177414 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99568 [article]

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080-05171	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt

Analysis of the spectral variability of urban materials for classification : A case study over Toulouse (France) / Sophie Lacherade (2005)  

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Reconnaissance de matériaux sur des images aériennes en multirecouvrement, par identification de fonctions de réflectances bidirectionnelles / Gilles Martinoty (2005) 

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Effets radiométriques en milieu urbain à grande échelle et correction des ombres / Gilles Martinoty in Revue Française de Photogrammétrie et de Télédétection, n° 176 (Décembre 2004)

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The hierarchy of the cocoons of a graph and its application to image segmentation / Laurent Guigues in Pattern recognition letters, vol 24 n° 8 (May 2003)  

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Analyse et représentation ensembles-échelle d'une image / Laurent Guigues (2003)  

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Modèles multi-échelles pour la segmentation d'images / Laurent Guigues (2003) 

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Remotely sensed image segmentation using an object point process / Sébastien Drot (2003)  

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Restitution et modélisation des paysages pour la production cartographique à partir d'imagerie aéroportée / Hervé Le Men (2003) 

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Scale sets image analysis / Laurent Guigues (2003)  

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Fabrication conjointe de modèles numériques de surface et d'ortho-images pour la visualisation perspective de scènes urbaines / Didier Boldo (2002) 

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