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Sylvain Prigent
PhD Student
 Keywords : Segmentation, Classification
 Demo : see this author's demo
 Contact :
| Mail : | | SylvaindotPrigentatinriadotfr | | Phone : | | (33)4-97-15-53-68 | | Fax : | | (33)4-92-38-76-43 | | Postal adress : | | INRIA Sophia Antipolis
2004, route des Lucioles
06902 Sophia Antipolis Cedex
France |
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| Abstract :
A hyper-spectral image consists of the same scene pictured at different wavelengths. Such an image enables to analyze an object or a scene by both, its spatial and spectral properties. The aim of my PhD, in collaboration with Galderma ( pharmaceutical company specializing in dermatology, whose shareholders are L'Oréal and Nestlé ) is to characterize skin lesions with multi and hyper-spectral images. For this, we are interested in spectral analysis and data reduction tools such as principal component analysis (PCA), independent component analysis (ICA) or projection pursuit, as well as classification tools like support vector machines (SVMs) for example.
My PhD is the following of my Master internship (from February to September 2009) which lead to 2 patents, OA09437 and OA09438, filed in November 2009 (50% INRIA, 50% Galderma). |
Short Bio :
 2009-2012: PhD in Ariana project (INRIA Sophia Antipolis, France), in collaboration with Galderma R&D (Sophia Antipolis, France)
2008-2009 : Master SIPT (Signal Image Parole Telecom,), with Honours (A) - Grenoble
2006-2009 : Engineering school, Institut National Polytechnique de Grenoble , ENSIEG-ENSE3 Image and signal processing. |
Last publications in Ariana Research Group :
Estimation of an optimal spectral band combination to evaluate skin disease treatment efficacy using multi-spectral images.
S. Prigent and D. Zugaj and X. Descombes and P. Martel and J. Zerubia. In Proc. IEEE International Conference on Image Processing (ICIP), Brussels, Belgium, September 2011.
@INPROCEEDINGS{prigent11a,
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| author |
= |
{Prigent, S. and Zugaj, D. and Descombes, X. and Martel, P. and Zerubia, J.}, |
| title |
= |
{Estimation of an optimal spectral band combination to evaluate skin disease treatment efficacy using multi-spectral images}, |
| year |
= |
{2011}, |
| month |
= |
{September}, |
| booktitle |
= |
{Proc. IEEE International Conference on Image Processing (ICIP)}, |
| address |
= |
{Brussels, Belgium}, |
| pdf |
= |
{http://hal.inria.fr/docs/00/59/06/94/PDF/icip_final.pdf}, |
| keyword |
= |
{} |
| } |
Abstract :
Clinical evaluation of skin treatments consists of two steps. First, the degree of the disease is measured clinically on a group of patients by dermatologists. Then, a statistical test is used on obtained set of measures to determine the treatment efficacy. In this paper, a method is proposed to automatically measure the severity of skin hyperpigmentation. After a classification step, an objective function is designed in order to obtain an optimal linear combination of bands defining the severity criterion. Then a hypothesis test is deployed on this combination to quantify treatment efficacy. |
Multi-spectral Image Analysis for Skin Pigmentation Classification.
S. Prigent and X. Descombes and D. Zugaj and P. Martel and J. Zerubia. In Proc. IEEE International Conference on Image Processing (ICIP), Hong-Kong, China, September 2010.
Keywords : skin hyper-pigmentation, Multi-spectral images, Support Vector Machines, Independant Component Analysis, Data reduction.
@INPROCEEDINGS{sp02,
|
| author |
= |
{Prigent, S. and Descombes, X. and Zugaj, D. and Martel, P. and Zerubia, J.}, |
| title |
= |
{Multi-spectral Image Analysis for Skin Pigmentation Classification}, |
| year |
= |
{2010}, |
| month |
= |
{September}, |
| booktitle |
= |
{Proc. IEEE International Conference on Image Processing (ICIP)}, |
| address |
= |
{Hong-Kong, China}, |
| pdf |
= |
{http://hal.inria.fr/docs/00/49/94/92/PDF/Article_ICIP.pdf}, |
| keyword |
= |
{skin hyper-pigmentation, Multi-spectral images, Support Vector Machines, Independant Component Analysis, Data reduction} |
| } |
Abstract :
In this paper, we compare two different approaches for semi-automatic detection of skin hyper-pigmentation on multi-spectral images. These two methods are support vector machine (SVM) and blind source separation. To apply SVM, a dimension reduction method adapted to data classification is proposed. It allows to improve the quality of SVM classification as well as to have reasonable computation time. For the blind source separation approach we show that, using independent component analysis, it is possible to extract a relevant cartography of skin pigmentation.
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Spectral Analysis and Unsupervised SVM Classification for Skin Hyper-pigmentation Classification.
S. Prigent and X. Descombes and D. Zugaj and J. Zerubia. In Proc. IEEE Workshop on Hyperspectral Image and Signal Processing : Evolution in Remote Sensing (WHISPERS), Reykjavik, Iceland, June 2010.
Keywords : Sectral analysis, Data reduction, Projection pursuit, Support Vector Machines, skin hyper-pigmentation.
@INPROCEEDINGS{sp01,
|
| author |
= |
{Prigent, S. and Descombes, X. and Zugaj, D. and Zerubia, J.}, |
| title |
= |
{Spectral Analysis and Unsupervised SVM Classification for Skin Hyper-pigmentation Classification}, |
| year |
= |
{2010}, |
| month |
= |
{June}, |
| booktitle |
= |
{Proc. IEEE Workshop on Hyperspectral Image and Signal Processing : Evolution in Remote Sensing (WHISPERS)}, |
| address |
= |
{Reykjavik, Iceland}, |
| pdf |
= |
{http://hal.inria.fr/docs/00/49/55/60/PDF/whispers2010_submission_124.pdf}, |
| keyword |
= |
{Sectral analysis, Data reduction, Projection pursuit, Support Vector Machines, skin hyper-pigmentation} |
| } |
Abstract :
Data reduction procedures and classification via support vector machines (SVMs) are often associated with multi or hyperspectral image analysis. In this paper, we propose an automatic method with these two schemes in order to perform a classification of skin hyper-pigmentation on multi-spectral images. We propose a spectral analysis method to partition the spectrum as a tool for data reduction, implemented by projection pursuit. Once the data is reduced, an SVM is used to differentiate the pathological from the healthy areas. As SVM is a supervised classification method, we propose a spatial criterion for spectral analysis in order to perform automatic learning. |
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All publications in Ariana Research Group
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