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Laurent Najman

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Présentation

<image style="float: left; margin-left: 5px; margin-right: 5px;" src="https://laurentnajman.org/uploads/images/LaurentNajman-portrait-2023-small.jpeg" width="142" height="160">**Laurent Najman** received the Habilitation à Diriger les Recherches in 2006 from the University of Marne-la-Vallée, a Ph.D. of applied mathematics from Paris-Dauphine University in 1994 with the highest honour (Félicitations du Jury) and an “Ingénieur” degree from the Ecole des Mines de Paris in 1991. After earning his engineering degree, he worked in the Central Research Laboratories of Thomson-CSF for three years, working on some problems of infrared image segmentation using mathematical morphology. He then joined a start-up company named Animation Science in 1995, as director of research and development. The technology of particle systems for computer graphics and scientific visualisation, developed by the company under his technical leadership received several awards, including the “European Information Technology Prize 1997” awarded by the European Commission (Esprit programme) and by the European Council for Applied Science and Engineering and the “Hottest Products of the Year 1996” awarded by the Computer Graphics World journal. In 1998, he joined OCÉ Print Logic Technologies, as senior scientist. He worked there on various problem of image analysis dedicated to scanning and printing. In 2002, he joined the Informatics Department of ESIEE, Paris, where he is professor and a member of the Laboratoire d’Informatique Gaspard Monge, Université Paris-Est Marne-la-Vallée. His current research interest is discrete mathematical morphology, discrete topology and optimization.

Publications

jean-cousty
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Characterization of graph-based hierarchical watersheds: theory and algorithms

Deise Santana Maia , Jean Cousty , Laurent Najman , Benjamin Perret
International Journal of Mathematical Imaging and Vision, 2020, Special Issue on Discrete Geometry for Computer Imagery 2019, 62 (5), pp.627-658. ⟨10.1007/s10851-019-00936-6⟩
Article dans une revue hal-02280023v2
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Properties of combinations of hierarchical watersheds

Deise Santana Maia , Jean Cousty , Laurent Najman , Benjamin Perret
Pattern Recognition Letters, 2019, 128, pp.513-520. ⟨10.1016/j.patrec.2019.10.009⟩
Article dans une revue hal-02175824v2
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Higra: Hierarchical Graph Analysis

Benjamin Perret , Giovanni Chierchia , Jean Cousty , Silvio Jamil F. Guimarães , Yukiko Kenmochi
SoftwareX, 2019, 10, pp.100335. ⟨10.1016/j.softx.2019.100335⟩
Article dans une revue hal-02309938v1
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Removing non-signicant regions in hierarchical clustering and segmentation

Benjamin Perret , Jean Cousty , Silvio Jamil Ferzoli Guimarães , Yukiko Kenmochi , Laurent Najman
Pattern Recognition Letters, 2019, 128, pp.433-439. ⟨10.1016/j.patrec.2019.10.008⟩
Article dans une revue hal-02305469v3
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Hierarchical segmentations with graphs: quasi-flat zones, minimum spanning trees, and saliency maps

Jean Cousty , Laurent Najman , Yukiko Kenmochi , Silvio Guimarães
Journal of Mathematical Imaging and Vision, 2018, 60 (4), pp.479-502. ⟨10.1007/s10851-017-0768-7⟩
Article dans une revue hal-01344727v2
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Hierarchizing graph-based image segmentation algorithms relying on region dissimilarity: the case of the Felzenszwalb-Huttenlocher method

Silvio J. Guimarães , Yukiko Kenmochi , Jean Cousty , Zenilton Patrocinio , Laurent Najman
Mathematical Morphology - Theory and Applications, 2017, ⟨10.1515/mathm-2017-0004⟩
Article dans une revue hal-01342967v4
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Scale-space for empty catheter segmentation in PCI fluoroscopic images

Ketan Bacchuwar , Jean Cousty , Régis Vaillant , Laurent Najman
International Journal of Computer Assisted Radiology and Surgery, 2017, 12 (7), pp.1179-1188. ⟨10.1007/s11548-017-1612-7⟩
Article dans une revue hal-01445849v3
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Improved Estimation of Cardiac Function Parameters Using a Combination of Independent Automated Segmentation Results in Cardiovascular Magnetic Resonance Imaging

Jessica Lebenberg , Alain Lalande , Patrick Clarysse , Irene Buvat , Christopher Casta
PLoS ONE, 2015, 10 (8), pp.e0135715. ⟨10.1371/journal.pone.0135715⟩
Article dans une revue hal-01235953v1
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Dimensional operators for mathematical morphology on simplicial complexes

Fabio Dias , Jean Cousty , Laurent Najman
Pattern Recognition Letters, 2014, 47, pp.111-119
Article dans une revue hal-00934488v1

A graph-based mathematical morphology reader

Laurent Najman , Jean Cousty
Pattern Recognition Letters, 2014, 47, pp.3-17. ⟨10.1016/j.patrec.2014.05.007⟩
Article dans une revue hal-00986191v1
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Collapses and watersheds in pseudomanifolds of arbitrary dimension

Jean Cousty , Gilles Bertrand , Michel Couprie , Laurent Najman
Journal of Mathematical Imaging and Vision, 2014, 50 (3), pp.261-285. ⟨10.1007/s10851-014-0498-z⟩
Article dans une revue hal-00871498v2
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Morphological filtering on graphs

Jean Cousty , Laurent Najman , Fabio Dias , Jean Serra
Computer Vision and Image Understanding, 2013, 117 (4), pp.370-385
Article dans une revue hal-00700784v2
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Nonsupervised Ranking of Different Segmentation Approaches: Application to the Estimation of the Left Ventricular Ejection Fraction From Cardiac Cine MRI Sequences

Jessica Lebenberg , I. Buvat , Alain Lalande , Patrick Clarysse , Christopher Casta
IEEE Transactions on Medical Imaging, 2012, 31 (8), pp.1651-1660. ⟨10.1109/TMI.2012.2201737⟩
Article dans une revue hal-00726197v1
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Artwork 3D model database indexing and classification

Sylvie Philipp-Foliguet , Michel M. Jordan , Laurent Najman , Jean Cousty
Pattern Recognition, 2011, 44 (3), pp.588-597
Article dans une revue hal-00538470v1

Segmentation of 4D cardiac MRI: automated method based on spatio-temporal watershed cuts

Jean Cousty , Laurent Najman , Michel Couprie , Stéphanie Clément-Guinaudeau , Thomas Goissen
Image and Vision Computing, 2010, 28 (8), pp.1229-1243
Article dans une revue hal-00622482v1
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Watershed Cuts: Thinnings, Shortest Path Forests, and Topological Watersheds

Jean Cousty , Gilles Bertrand , Laurent Najman , Michel Couprie
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2010, 32 (5), pp.925-939
Article dans une revue hal-00729346v1
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Watershed Cuts: Minimum Spanning Forests and the Drop of Water Principle

Jean Cousty , Gilles Bertrand , Laurent Najman , Michel Couprie
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2009, 31 (8), pp.1362-1374
Article dans une revue hal-00622410v1

Fusion graphs: merging properties and watersheds

Jean Cousty , Gilles Bertrand , Michel Couprie , Laurent Najman
Journal of Mathematical Imaging and Vision, 2008, 30 (1), pp.87-104
Article dans une revue hal-00622371v1
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Weighted fusion graphs: merging properties and watersheds

Jean Cousty , Michel Couprie , Laurent Najman , Gilles Bertrand
Discrete Applied Mathematics, 2008, 156 (15), pp.3011-3027
Article dans une revue hal-00622473v1
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Exploring Hierarchy Simplification for Non-Significant Region Removal

Isabela Borlido Barcelos , Gabriel Barbosa da Fonseca , Laurent Najman , Yukiko Kenmochi , Benjamin Perret
2019 32nd SIBGRAPI Conference on Graphics, Patterns and Images (SIBGRAPI), Oct 2019, Rio de Janeiro, Brazil. pp.100-107, ⟨10.1109/SIBGRAPI.2019.00022⟩
Communication dans un congrès hal-03132023v1
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Recognizing hierarchical watersheds

Deise S Maia , Jean Cousty , Laurent Najman , Benjamin Perret
DGCI2019, Mar 2019, Noisy-le-grand, France. pp.300-313, ⟨10.1007/978-3-030-14085-4_24⟩
Communication dans un congrès hal-01948502v1
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On the probabilities of hierarchical watersheds

Deise Santana Maia , Jean Cousty , Laurent Najman , Benjamin Perret
International Symposium on Mathematical Morphology, Jul 2019, Saarbrücken, Germany. ⟨10.1007/978-3-030-20867-7_11⟩
Communication dans un congrès hal-02180484v1
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Watersheding hierarchies

Deise Santana Maia , Jean Cousty , Laurent Najman , Benjamin Perret
International Symposium on Mathematical Morphology, Jul 2019, Saarbrücken, Germany. ⟨10.1007/978-3-030-20867-7_10⟩
Communication dans un congrès hal-02180478v1
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VOIDD: automatic vessel of intervention dynamic detection in PCI procedures

Ketan Bacchuwar , Jean Cousty , Régis Vaillant , Laurent Najman
CVII-Stent Workshop MICCAI 2017, Sep 2017, Quebec City, Canada. pp.136 - 157, ⟨10.1109/MSP.2009.934154⟩
Communication dans un congrès hal-01615465v1
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Graph-based Hierarchical Video Cosegmentation

Franciele Rodrigues , Pedro Leal , Yukiko Kenmochi , Jean Cousty , Laurent Najman
19th International Conference on Image Analysis and Processing, Sebastiano Battiato; Giovanni Gallo; Raimondo Schettini; Filippo Stanco, Sep 2017, Catania, Italy. ⟨10.1007/978-3-319-68560-1_2⟩
Communication dans un congrès hal-01548112v1
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Evaluation of combinations of watershed hierarchies

Deise S Maia , Arnaldo de A Araujo , Jean S Cousty , Laurent Najman , Benjamin Perret
ISMM 2017, May 2017, Fontainebleau, France. pp.133-145, ⟨10.1007/978-3-319-57240-6_11⟩
Communication dans un congrès hal-01552420v1
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Watersheds on Hypergraphs for Data Clustering

Fabio Dias , Moussa R Mansour , Paola R Valdivia , Jean Cousty , Laurent Najman
ISMM 2017 - 13th International Symposium on Mathematical Morphology and Its Applications to Signal and Image Processing, May 2017, Fontainebleau, France. pp.211-221, ⟨10.1007/978-3-319-57240-6_17⟩
Communication dans un congrès hal-01592155v1
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Stochastic hierarchical watershed cut based on disturbed topographical surface

Carols Alberto F. Pimentel Filho , Arnaldo Albuquerque de Araújo , Jean Cousty , Silvio Jamil F. Guimarães , Laurent Najman
29th SIBGRAPI Conference on Graphics, Patterns and Images, SIBGRAPI 2016, Oct 2016, Sao Paulo, Brazil. ⟨10.1109/SIBGRAPI.2016.044⟩
Communication dans un congrès hal-01616394v1
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Decreasing the Number of Features for Improving Human Action Classification

Jacques de Souza Kleber , Arnaldo de Albuquerque Araújo , Zenilton Kleber G. Do Parocinio Jr , Jean Cousty , Laurent Najman
29th SIBGRAPI Conference on Graphics, Patterns and Images (SIBGRAPI 2016), Oct 2016, Sao Paulo, Brazil. ⟨10.1109/SIBGRAPI.2016.035⟩
Communication dans un congrès hal-01616376v1
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New characterizations of minimum spanning trees and of saliency maps based on quasi-flat zones

Jean Cousty , Laurent Najman , Yukiko Kenmochi , Silvio Guimarães
12th International Symposium on Mathematical Morphology (ISMM), Benediktsson, J.A.; Chanussot, J.; Najman, L.; Talbot,, May 2015, Reykjavik, Iceland. pp.205-216, ⟨10.1007/978-3-319-18720-4_18⟩
Communication dans un congrès hal-01148958v1
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A Comparison of Some Morphological Filters for Improving OCR Performance

Laurent Mennillo , Jean Cousty , Laurent Najman
Mathematical Morphology and Its Applications to Signal and Image Processing, Benediktsson, J.A.; Chanussot, J.; Najman, L.; Talbot, H., May 2015, Reykjavik, Iceland. ⟨10.1007/978-3-319-18720-4_12⟩
Communication dans un congrès hal-01168641v1
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Hierarchical image segmentation relying on a likelihood ratio test

Silvio Jamil F. Guimarães , Zenilton Kleber Gonçalves Do Patrocinio , Yukiko Kenmochi , Jean Cousty , Laurent Najman
ICIAP 2015, Sep 2015, Genova, Italy. ⟨10.1007/978-3-319-23234-8_3⟩
Communication dans un congrès hal-01229844v1
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Morphological Floodings and Optimal Cuts in Hierarchies

Jean Cousty , Laurent Najman
International Conference on Image Processing (ICIP), Oct 2014, Paris, France. ⟨10.1109/ICIP.2014.7025905⟩
Communication dans un congrès hal-01082353v1
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A mutual reference shape based on information theory

Stéphanie Jehan-Besson , C Tilmant , A de Cesare , A Lalande , A Cochet
International Conference on Image Processing ICIP, Oct 2014, Paris, France. pp.887 - 891, ⟨10.1109/ICIP.2014.7025178⟩
Communication dans un congrès hal-01081376v1
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Playing with Kruskal: algorithms for morphological trees in edge-weighted graphs

Laurent Najman , Jean Cousty , Benjamin Perret
International Symposium on Mathematical Morphology, May 2013, Uppsala, Sweden. pp.135-146
Communication dans un congrès hal-00798621v1
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Constructive links between some morphological hierarchies on edge-weighted graphs

Jean Cousty , Laurent Najman , Benjamin Perret
International Symposium on Mathematical Morphology, May 2013, Uppsala, Sweden. pp.85-96
Communication dans un congrès hal-00798622v2
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Hierarchical video segmentation using an observation scale

Kleber Jacques de Souza , Arnaldo Albuquerque de Araújo , Zenilton Kleber G. Do Patricio Jr. , Jean Cousty , Laurent Najman
26th SIBRAPI Conference on Graphics, Patterns and Images - SIPGRAPI 2013, Aug 2013, Arequipa, Peru. ⟨10.1109/SIBGRAPI.2013.51⟩
Communication dans un congrès hal-01616403v1

A hybrid algorithm for automatic heart delineation in CT angiography

Imen Melki , Hugues Talbot , Jean Cousty , Laurent Najman , Céline Pruvot
Computer Assisted Radiology and Surgery - CARS'2012, Jun 2012, France. pp.S37-S38
Communication dans un congrès hal-00730481v1
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A reference free approach for the comparative evaluation of eight segmentation methods for the estimation of the left ventricular ejection fraction in cardiac MRI.

Alain Lalande , Jessica Lebenberg , Irène Buvat , Patrick Clarysse , Christopher Casta
European Society for Magnetic Resonance in Medicine and Biology (ESMRMB), Oct 2012, Lisbonne, Portugal. pp.658
Communication dans un congrès hal-00787512v1

A hybrid algorithm for automatic heart segmentation in CT angiography

Imen Melki , Hugues Talbot , Jean Cousty , Céline Pruvot , Jérôme Knoplioch
International Conference on Image Processing - ICIP'2012, Sep 2012, Orlando, United States. pp.2013 - 2016, ⟨10.1109/ICIP.2012.6467284⟩
Communication dans un congrès hal-00730483v1
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A hierarchical image segmentation algorithm based on an observation scale

Silvio Jamil Ferzoli Guimarães , Jean Cousty , Yukiko Kenmochi , Laurent Najman
Joint IAPR International Workshop, SSPR&SPR 2012, Nov 2012, Japan. pp.116-125, ⟨10.1007/978-3-642-34166-3_13⟩
Communication dans un congrès hal-00789387v1
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Méthodologie Pour Comparer Différentes Méthodes D'extraction De Biomarqueurs Sans Méthode De Référence. Application À La Segmentation Du Ventricule Gauche En Irm Cardiaque Pour Estimer La Fraction D'éjection.

Frédérique Frouin , Mireille Garreau , Irène Buvat , Christopher Casta , Constantin Constantinidès
RITS 2011 (Colloque National Recherche en Imagerie et Technologies pour la Santé), Apr 2011, Rennes (CHU), France
Communication dans un congrès hal-00908741v1
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Comparison of different segmentation approaches without using gold standard. Application to the estimation of the left ventricle ejection fraction from cardiac cine MRI sequences.

Jessica Lebenberg , Irène Buvat , Mireille Garreau , Christopher Casta , Constantin Constantinidès
Annual International Conference of the IEEE Engineering in Medicine and Biology Society., Aug 2011, Boston, United States. pp.2663-6, ⟨10.1109/IEMBS.2011.6090732⟩
Communication dans un congrès inserm-00773261v1
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Incremental algorithm for hierarchical minimum spanning forests and saliency of watershed cuts

Jean Cousty , Laurent Najman
10th International Symposium on Mathematical Morphology (ISMM'11), Jul 2011, Verbania-Intra, Italy. pp.272-283, ⟨10.1007/978-3-642-21569-8_24⟩
Communication dans un congrès hal-00622505v1

Some morphological operators on simplicial complex spaces

Fabio Dias , Jean Cousty , Laurent Najman
Discrete geometry for computer imagery (DGCI'11), Apr 2011, Nancy, France. pp.441--452, ⟨10.1007/978-3-642-19867-0_37⟩
Communication dans un congrès hal-00730470v1

Estimation d'une forme mutuelle pour l'évaluation de la segmentation en imagerie cardiaque

Stéphanie Jehan-Besson , Christophe Tilmant , Alain de Cesare , Frédérique Frouin , Laurent Najman
23ème Colloque GRETSI - Traitement du Signal et des Images (GRETSI '11), 2011, France. 10pp
Communication dans un congrès hal-00622511v1
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Collapses and watersheds in pseudomanifolds

Jean Cousty , Gilles Bertrand , Michel Couprie , Laurent Najman
13th International Workshop on Combinatorial Image Analysis (IWCIA'09), Nov 2009, France. pp.397-410
Communication dans un congrès hal-00622419v1

4D Morphological segmentation and the miccai LV-segmentation grand challenge

Laszlo Marak , Jean Cousty , Laurent Najman , Hugues Talbot
MICCAI 2009 Workshop on Cardiac MR Left Ventricle Segmentation Challenge, Nov 2009, France. pp.1-8
Communication dans un congrès hal-00622420v1

Some morphological operators in graph spaces

Jean Cousty , Laurent Najman , Jean Serra
9th International Symposium on Mathematical Morphology (ISMM 2009), Aug 2009, Groningen, Netherlands. pp.149-160, ⟨10.1007/978-3-642-03613-2_14⟩
Communication dans un congrès hal-00622403v1
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Raising in watershed lattices

Jean Cousty , Laurent Najman , Jean Serra
15th IEEE International Conference on Image Processing (ICIP'08), Oct 2008, San Diego, USA, France. pp.2196-2199
Communication dans un congrès hal-00622472v1

Region-based artwork indexing and classification

Marcel Alcoverro , Sylvie Philipp-Foliguet , Michel Jordan , Laurent Najman , Jean Cousty
3DTV Conference: The True Vision - Capture, Transmission and Display of 3D Video (3DTV'08), May 2008, Istanbul, Turkey. pp.393 -396, ⟨10.1109/3DTV.2008.4547891⟩
Communication dans un congrès hal-00622243v1
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On watershed cuts and thinnings

Jean Cousty , Gilles Bertrand , Laurent Najman , Michel Couprie
Discrete Geometry for Computer Imagery, 2008, France. pp.434-445
Communication dans un congrès hal-00622037v1
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Region-based 3D artwork indexing and classification

M. Alcoverro , S. Philipp-Foliguet , M. Jordan , Laurent Najman , Jean Cousty
Proceedings of the IEEE 3DTV-Con Conference, May 2008, Istanbul, Turkey. pp.393-396, ⟨10.1109/3DTV.2008.4547891⟩
Communication dans un congrès hal-00351635v1

Automated, Accurate and Fast Segmentation of 4D Cardiac MR Images

Jean Cousty , Laurent Najman , Michel Couprie , Stéphanie Clément-Guinaudeau , Thomas Goissen
Functional Imaging and Modeling of the Heart, 2007, France. pp.474-483
Communication dans un congrès hal-00622242v1

Watershed cuts

Jean Cousty , Gilles Bertrand , Laurent Najman , Michel Couprie
International Symposium on Mathematical Morphology - International Symposium on Mathematical Morphology'07, 8th International Symposium, Proceedings, 2007, France. pp.301-312
Communication dans un congrès hal-00622036v1

An open, clinically-validated database of 3D+t cine-MR images of the left ventricle with associated manual and automated segmentation

Laurent Najman , Jean Cousty , Michel Couprie , Hugues Talbot , Stéphanie Clément-Guinaudeau
ISC/NA-MIC Workshop on Open Science at Medical Image Computing and Computer-Assisted Intervention, 2007, France. 10pp
Communication dans un congrès hal-00622251v1

Accurate assessment of left ventricular function in infarct patients with fully automated 4D segmentation of complete short-axis cine-MRI dataset

Thomas Goissen , Stéphanie Clément-Guinaudeau , Jean Cousty , Laurent Najman , Jean-Luc Dubois-Randé
Archives des Maladies du Cøeur et des Vaisseaux, 2006, -, France. pp.77-77
Communication dans un congrès hal-00622342v1

Fusion graphs, region merging and watersheds

Jean Cousty , Gilles Bertrand , Michel Couprie , Laurent Najman
Discrete Geometry for Computer Imagery, 2006, France. pp.343-354
Communication dans un congrès hal-00622035v1

Fully automated segmentation of 4D cardiac cine-MRI dataset in humans

Stéphanie Clément-Guinaudeau , Thomas Goissen , Jean Cousty , Jean-Luc Dubois-Randé , Alain Rahmouni
Archives des Maladies du Cøeur et des Vaisseaux, 2006, France. pp.26-27
Communication dans un congrès hal-00622535v1

Grayscale watersheds on perfect fusion graphs

Jean Cousty , Michel Couprie , Laurent Najman , Gilles Bertrand
Combinatorial Image Analysis, 2006, France. pp.60-73
Communication dans un congrès hal-00622038v1

Segmentation cardiaque spatio-temporelle

Jean Cousty , Laurent Najman , Michel Couprie
?. Segmentation cardiaque spatio-temporelle, Hermes Sciences, 10pp., 2010
Chapitre d'ouvrage hal-00622520v1

3D+t cardiac segmentation

Jean Cousty , Laurent Najman , Michel Couprie
Najman Laurent, Talbot Hugues. Mathematical morphology: from theory to applications, ISTE-Wiley, pp.389-394, 2010
Chapitre d'ouvrage hal-00622503v1

Chapter 3 - Watersheds in discrete spaces

Gilles Bertrand , Michel Couprie , Jean Cousty , Laurent Najman
Najman Laurent, Talbot Hugues. Mathematical morphology: from theory to applications, ISTE-Wiley, pp.81-107, 2010
Chapitre d'ouvrage hal-00622500v1
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Discrete region merging and watersheds

Laurent Najman , Gilles Bertrand , Michel Couprie , Jean Cousty
Passare Mikael. Complex Analysis and Digital Geometry. Proceedings from the Kiselmanfest, 2006, 86, Uppsala University, pp.199-222, 2009, Acta Universitatis Upsaliensis, 978-91-554-7672-4
Chapitre d'ouvrage hal-00622458v1

Chapter 4 - Ligne de partage des eaux dans les espaces discrets

Gilles Bertrand , Michel Couprie , Jean Cousty , Laurent Najman
Najman Laurent, Talbot Hugues. Morphologie mathématique : approches déterministes, Hermes Sciences Publications, pp.123-149, 2008
Chapitre d'ouvrage hal-00622341v1
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Proofs of the properties presented in the article "Watersheding hierarchies"

Deise Santana Maia , Jean Cousty , Laurent Najman , B Perret
[Research Report] Université Paris-Est, LIGM UMR CNRS 8049, France; ESIEE Paris. 2019
Rapport hal-02087042v1
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Morphological filters for OCR: a performance comparison

Laurent Mennillo , Jean Cousty , Laurent Najman
[Research Report] LIGM - Laboratoire d'Informatique Gaspard-Monge. 2012
Rapport hal-00762631v1