
R. Lerallut,, E. Decencière, F. Meyer (2007): Image filtering using morphological amoebas. Image and Vision Computing 25(4) 395—404.
This paper presents morphological operators with nonfixed shape kernels, or amoebas, which take into account the image contour variations to adapt their shape. Experiments on grayscale and color images demonstrate that these novel filters outperform classical morphological operations with a fixed, spaceinvariant structuring element for noise reduction applications. Tests on synthetic 3D images are then performed to show the high noisereduction capacity of amoebabased filters.
G. Noyel, J. Angulo, D. Jeulin (2007): Random Germs and Stochastic Watershed for Unsupervised Multispectral Image Segmentation. KnowledgeBased Intelligent Information and Engineering Systems: 11th International Conference, KES 2007, Vietri sul Mare, Salerno (Italy) LNAI 4694(Part III) 17—24.
This paper extends the use of stochastic watershed, recently introduced by Angulo and Jeulin [1], to unsupervised segmentation of multispectral images. Several probability density functions (pdf), derived from Monte Carlo simulations (M realizations of N random markers), are used as a gradient for segmentation: a weighted marginal pdf a vectorial pdf and a probabilistic gradient. These gradientlike functions are then segmented by a volumebased watershed algorithm to define the R largest regions. The various gradients are computed in multispectral image space and in factor image space, which...
G. Noyel, J. Angulo, D. Jeulin (2007): On distances, paths and connections for hyperspectral image segmentation. International Symposium on Mathematical Morphology, Rio de Janeiro (Brazil) 1 399—410.
The present paper introduces the η and µ connections in order to add regional information on λflat zones, which only take into account a local information. A topdown approach is considered. First λflat zones are built in a way leading to a subsegmentation. Then a finer segmentation is obtained by computing ηbounded regions and μgeodesic balls inside the λflat zones. The proposed algorithms for the construction of new partitions are based on queues with an ordered selection of seeds using the cumulative distance. ηbounded regions offers a control on the variations of amplitude...
S. Marusic, P. Dokládal, A. Erginay, J.C. Klein, M. Palaniswami (2007): Frequency Selective HeightfromStereo Reconstruction : Application to Retinal Oedemas Detection. European Signal Processing Conference, Poznan (Poland).
G. Noyel, J. Angulo, D. Jeulin (2007): Morphological segmentation of hyperspectral images. Image Analysis and Stereology 26(3) 101—109.
The present paper develops a general methodology for the morphological segmentation of hyperspectral images, i.e., with an important number of channels. This approach, based on watershed, is composed of a spectral classification to obtain the markers and a vectorial gradient which gives the spatial information. Several alternative gradients are adapted to the different hyperspectral functions. Data reduction is performed either by Factor Analysis or by model fitting. Image segmentation is done on different spaces: factor space, parameters space, etc. On all these spaces the spatial/spectral...
A. Jean, S. Cantournet, S. Forest, D. Jeulin, V. Mounoury, F. N'Guyen (2007): Modélisation de la nanostructure d'un élastomère chargé. 18ème congrès français de mécanique 6 p..
F. Lemaire, C.A. Mandon, J. Reboud, A. Papine, J. Angulo, H. Pointu, C. DiazLatoud, C. Lajaunie, F. Chatelain, A.P. Arrigo, B. Schaack (2007): Toxicity assays in nanodrops combining bioassay and morphometric endpoints. PLoS ONE 2(1) e163.
BACKGROUND: Improved chemical hazard management such as REACH policy objective as well as drug ADMETOX prediction, while limiting the extent of animal testing, requires the development of increasingly high throughput as well as highly pertinent in vitro toxicity assays. METHODOLOGY: This report describes a new in vitro method for toxicity testing, combining cellbased assays in nanodrop CellonChip format with the use of a genetically engineered stress sensitive hepatic cell line. We tested the behavior of a stress inducible fluorescent HepG2 model in which Heat Shock Protein promoters...
D. Jeulin, M. Moreaud (2007): Statistical representative volume element for predicting the dielectric permittivity of random media. Continuum models and discrete systems CDMS 11: proceedings of the International symposium held in Paris july 30thAugust 2nd 2007 429—436.
When operating homogenization of random media by means of numerical simulations, it is of primary importance to know the precision of the effective property estimated on a bounded domain of a microstructure, and the size of a socalled Representative Volume Element RVE. To solve this problem, a statistical approach was developed, based on the experimental determination of the integral range of from numerical simulations. It enables us to relate the variance of the effective permittivity as a function of the volume V of the simulation, or equivalently of the number of small size unbiased...
D. Jeulin, W. Li, M. OstojaStarzewski (2007): On the geodesic property of strain field patterns in elastoplastic composites. Continuum models and discrete systems CDMS 11: proceedings of the International symposium held in Paris july 30thAugust 2nd 2007 167—172.
We explore the geodesic (i.e., shortest path) character of strain fields occurring in elastoplastic response of planar, disordered inclusionmatrix composites. The composites have spatially random morphologies with the matrix being more compliant and weaker than the inclusions, and perfect bonding everywhere. A quantitative comparison of response pattern obtained by computational micromechanics with that found only by mathematical morphology indicates that (i) the regions of plastic flow are close (or even very close) to geodesics, and (ii) a purely geometric, and orders of magnitude more...
E. ParraDenis, N. Moulin, D. Jeulin (2007): Threedimensional complex shapes analysis from 3D local curvature measurements: application to intermetallic particles in aluminium alloy 5xxx. Image Analysis and Stereology 26(3) 157—164.
The studied material is a 5xxx aluminium alloys containing 2 types of intermetallic particles : Alx(Fe;Mn) and Mg2Si. It is usually used in car industry as reinforcement pieces or in packaging industry, such as bottle liquid box lid. Scanning electronic microscope coupled with EDX analysis shows complex shapes of intermetallic particles. The particle shape is obtained during the solidification of alloys. Particles fill vacant spaces between aluminium grains. Therefore final sheet properties depend on intermetallic particles shapes and notably on the matrixparticle interface properties. The...
J. Angulo, J. Serra (2007): Modelling and segmentation of colour images in polar representations. Image and Vision Computing 25(4) 475—495.
The suitability of polar representation for quantitative image processing tasks is investigated. The classical colour polarbased representations (HLS, HSV, etc.) lead to brightness and saturation with nonconsistent properties. After a short critical analysis of the gamma correction, a new polar representation using the L1 norm is proposed. It satisfies several quantitative requirements. The relevance of this representation is demonstrated by means of luminance/saturation histograms, which exhibit typical alignments. Their physical interpretation leads to a model for light reception in terms...
Y. Yamanishi, F. Bach, J.P. Vert (2007): Glycan classification with tree kernels. Bioinformatics 23(10) 1211—6.
MOTIVATION: Glycans are covalent assemblies of sugar that play crucial roles in many cellular processes. Recently, comprehensive data about the structure and function of glycans have been accumulated, therefore the need for methods and algorithms to analyze these data is growing fast. RESULTS: This article presents novel methods for classifying glycans and detecting discriminative glycan motifs with support vector machines (SVM). We propose a new class of tree kernels to measure the similarity between glycans. These kernels are based on the comparison of tree substructures, and take into...
E. Brun, A. Hassaïne, B. Besserer, E. Decencière (2007): Restoration of Variable Area Soundtracks. Proceedings: 14th IEEE International Conference on Image Processing 2007 4 13—16.
Film restoration using digital image processing has been an active research field. However, the restoration of the soundtrack has been mainly performed in the sound domain, using signal processing methods, in spite of the fact that it is recorded as a continuous image between the film images and the perforations. In this paper, we present a complete system for variable area optical soundtrack restoration at the image level. The scanned soundtrack is treated using morphological operators, including a novel quasidistance function. Working with the image representation of the soundtrack allows...
C. Vincent, C. Caciu, G. Monteil, E. Decencière, D. Jeulin (2007): Friction analysis in laser textured surface lubricated contacts. STLE Annual Meeting CD—ROM pp. 1—4.
R. Costa, J. Hafsaoui, A. Grosjean, M.H. Berger, D. Jeulin, A. Thorel (2007): Elaboration by organic tape casting and cosintering of anode/electrolyte half cells for protonic ceramic fuel cell (PCFC). 10th ECerS conference 880—884.
L. Denis, T. Fournel, C. Fournier, D. Jeulin (2007): Reconstruction of the rose of directions from a digital microhologram of fibers. Journal of Microscopy 225(3) 283–292.
Digital holography makes it possible to acquire quickly the interference patterns of objects spread in a volume. The digital processing of the fringes is still too slow to achieve on line analysis of the holograms. We describe a new approach to obtain information on the direction of illuminated objects. The key idea is to avoid reconstruction of the volume followed by classical threedimensional image processing. The hologram is processed using a global analysis based on autocorrelation. A fundamental property of diffraction patterns leads to an estimate of the mean geometriccovariogram...
T. Retornaz (2007): Détection de textes enfouis dans des bases d'images généralistes : un descripteur sémantique pour l'indexation.
Multimedia data bases, both personal and professional, are continuously growing and the need for automatic solutions becomes mandatory. Effort devoted by the research community to contentbased image indexing is also growing, but the semantic gap is difficult to cross: the low level descriptors used for indexing are not efficient enough for an ergonomic manipulation of big and generic image data bases. The text present in a scene is usually linked to image semantic context and constitutes a relevant descriptor for contentbased image indexing. In this thesis we present an approach to...
A. Jean, D. Jeulin, S. Cantournet, S. Forest, F. N'Guyen, V. Mounoury (2007): Rubber with carbon black fillers : parameters identification of a multiscale nanostructure model. Constitutive models for rubber V 141—146.
Most materials, assumed homogeneous at a specific scale are heterogenous at lower scale .....
F. Bach (2007): Consistency of the group Lasso and multiple kernel learning.
We consider the leastsquare regression problem with regularization by a block 1norm, i.e., a sum of Euclidean norms over spaces of dimensions larger than one. This problem, referred to as the group Lasso, extends the usual regularization by the 1norm where all spaces have dimension one, where it is commonly referred to as the Lasso. In this paper, we study the asymptotic model consistency of the group Lasso. We derive necessary and sufficient conditions for the consistency of group Lasso under practical assumptions, such as model misspecification. When the linear predictors and Euclidean...
F. El Houdaigui, S. Forest, A.F. Gourgues, D. Jeulin (2007): On the size of the representative volume element for isotropic elastic polycrystalline copper. IUTAM symposium on mechanical behavior and micro mechanics of nanostructured materials 171—180.
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