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Publications de 2008
Résultat de la recherche dans la liste des publications :
4 Rapports de recherche et Rapports techniques |
2 - Parametric blind deconvolution for confocal laser scanning microscopy-proof of concept.
P. Pankajakshan et L. Blanc-Féraud et B. Zhang et Z. Kam et J.C. Olivo-Marin et J. Zerubia. Rapport de Recherche 6493, INRIA, avril 2008.
Mots-clés : Confocal Laser Scanning Microscopy, Bayesian restoration, Blind Deconvolution, point spread function, Richardson-Lucy algorithm, Variation totale.
Copyright : ARIANA/INRIA
@TECHREPORT{ppankajakshan08b,
|
| author |
= |
{Pankajakshan, P. and Blanc-Féraud, L. and Zhang, B. and Kam, Z. and Olivo-Marin, J.C. and Zerubia, J.}, |
| title |
= |
{Parametric blind deconvolution for confocal laser scanning microscopy-proof of concept}, |
| year |
= |
{2008}, |
| month |
= |
{avril}, |
| institution |
= |
{INRIA}, |
| type |
= |
{Research Report}, |
| number |
= |
{6493}, |
| url |
= |
{https://hal.inria.fr/inria-00269265}, |
| pdf |
= |
{http://hal.inria.fr/docs/00/27/02/92/PDF/report.pdf}, |
| keyword |
= |
{Confocal Laser Scanning Microscopy, Bayesian restoration, Blind Deconvolution, point spread function, Richardson-Lucy algorithm, Variation totale} |
| } |
Résumé :
Nous proposons une méthode de restauration itérative d’images de fluorescence
CLSM et d’estimation paramétrique de la fonction de flou (PSF) du système d’acquisition.
Le CLSM est un microscope qui balaye un échantillon en 3D et utilise une sténopée pour
rejeter la lumière en dehors du point de focalisation. Néanmoins, la qualité des images
souffre de deux limitations physiques. La première est due à la diffraction due au système
optique et la seconde est due à la quantité réduite de lumière détectée par le tube
photo-multiplicateur (PMT). Ces limitations induisent respectivement un flou et du bruit
de comptage de photons. Les images peuvent alors bénéficier d’un post-traitement de
restauration fondé sur la déconvolution. Le problème à traiter est l’estimation simultanée
de la distribution 3D de l’échantillon des sources fluorescentes et de la PSF du microscope
(i.e. de déconvolution aveugle). En utilisant un modèle de processus physique
d’acquisition d’images microscopiques (CLSM), on réduit le nombre de paramètres libres
décrivant la PSF et on introduit des contraintes. On introduit aussi des connaissances a
priori sur l’échantillon ce qui permet de stabiliser le processus d’estimation et de favoriser
la convergence. Des expériences sur des données synthétiques montrent que la PSF peut
être estimée avec précision. Des expériences sur des données réelles montrent de bons
resultats de déconvolution en comparaison avec le modèle théorique de la PSF du microscope. |
Abstract :
We propose a method for the iterative restoration of fluorescence Confocal Laser Scanning Microscope (CLSM) images with parametric estimation of the acquisition system’s Point Spread Function (PSF). The CLSM is an optical fluorescence microscope that scans a specimen in 3D and uses a pinhole to reject most of the out-of-focus light. However, the quality of the image suffers from two primary physical limitations. The first is due to the diffraction-limited nature of the optical system and the second is due to the reduced amount of light detected by the photomultiplier tube (PMT). These limitations cause blur and photon counting noise respectively. The images can hence benefit from post-processing restoration methods based on deconvolution. An efficient method for parametric blind image deconvolution involves the simultaneous estimation of the specimen 3D distribution of fluorescent sources and the microscope PSF. By using a model for the microscope image acquisition physical process, we reduce the number of free parameters describing the PSF and introduce constraints. The parameters of the PSF may vary during the course of experimentation, and so they have to be estimated directly from the observation data. We also introduce a priori knowledge of the specimen that permits stabilization of the estimation process and favorizes the convergence. Experiments on simulated data show that the PSF could be estimatedwith a higher degree of accuracy and those done on real data show very good deconvolution results in comparison to the theoretical microscope PSF model. |
|
3 - On the illumination invariance of the level lines under directed light. Application to change detection.
P. Weiss et A. Fournier et L. Blanc-Féraud et G. Aubert. Rapport de Recherche 6612, INRIA, 2008.
Mots-clés : Level Lines, illumination invariance, topographic map, Change detection, remote sensing, Zones urbaines.
Copyright :
@TECHREPORT{RR-6612,
|
| author |
= |
{Weiss, P. and Fournier, A. and Blanc-Féraud, L. and Aubert, G.}, |
| title |
= |
{On the illumination invariance of the level lines under directed light. Application to change detection}, |
| year |
= |
{2008}, |
| institution |
= |
{INRIA}, |
| type |
= |
{Research Report}, |
| number |
= |
{6612}, |
| url |
= |
{https://hal.archives-ouvertes.fr/inria-00310383}, |
| pdf |
= |
{http://hal.inria.fr/docs/00/31/03/83/PDF/RR-6612.pdf}, |
| keyword |
= |
{Level Lines, illumination invariance, topographic map, Change detection, remote sensing, Zones urbaines} |
| } |
Abstract :
We analyze the illumination invariance of the level lines of an image. We show that if the scene surface has Lambertian reflectance and the light is directed, then a necessary condition for the level lines to be illumination invariant is that the 3D scene be developable and that its albedo satisfies some geometrical constraints. We then show that the level lines are ``almost'' invariant for piecewise developable surfaces. Such surfaces fit most of the urban structures. In a second part, this allows us to devise a very fast algorithm that detects changes between pairs of remotely sensed images of urban areas, independently of the lighting conditions. We show the effectiveness of the algorithm both on synthetic OpenGL scenes and real Quickbird images. We compare the efficiency of the proposed algorithm with other classical approaches and show that it is superior both in practice and in theory. |
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4 - Reconstruction d'images satellitaires à partir d'un échantillonnage irrégulier.
M. Carlavan et P. Weiss et L. Blanc-Féraud et J. Zerubia. Rapport de Recherche 6732, INRIA, 2008.
Mots-clés : l1 norm, nesterov scheme, total variation minimization, wavelet.
Copyright :
@TECHREPORT{RR-6732,
|
| author |
= |
{Carlavan, M. and Weiss, P. and Blanc-Féraud, L. and Zerubia, J.}, |
| title |
= |
{Reconstruction d'images satellitaires à partir d'un échantillonnage irrégulier}, |
| year |
= |
{2008}, |
| institution |
= |
{INRIA}, |
| type |
= |
{Research Report}, |
| number |
= |
{6732}, |
| url |
= |
{http://hal.archives-ouvertes.fr/inria-00340975/fr/}, |
| pdf |
= |
{http://hal.inria.fr/docs/00/34/09/75/PDF/RR-6732.pdf}, |
| keyword |
= |
{l1 norm, nesterov scheme, total variation minimization, wavelet} |
| } |
|
 haut de la page
2 Articles de collection ou Chapitres de livres |
1 - Deconvolution of images.
J. Idier et L. Blanc-Féraud. Dans Bayesian approach to inverse problems, Ed. J. Idier, Publ. ISTE and John Wiley & Sons, 2008.
Mots-clés : Problèmes Inverses, Approche bayésienne, Traitement d'image.
Copyright : ISTE Ltd
@INCOLLECTION{blancferaud08,
|
| author |
= |
{Idier, J. and Blanc-Féraud, L.}, |
| title |
= |
{Deconvolution of images}, |
| year |
= |
{2008}, |
| booktitle |
= |
{Bayesian approach to inverse problems}, |
| editor |
= |
{J. Idier}, |
| publisher |
= |
{ISTE and John Wiley & Sons}, |
| url |
= |
{http://eu.wiley.com/WileyCDA/WileyTitle/productCd-1848210329.html}, |
| pdf |
= |
{http://onlinelibrary.wiley.com/doi/10.1002/9780470611197.ch6/summary}, |
| keyword |
= |
{Problèmes Inverses, Approche bayésienne, Traitement d'image} |
| } |
|
2 - Unsupervised problems.
X. Descombes et Y. Goussard. Dans Bayesian approach to inverse problems, Ed. J. Idier, Publ. ISTE and John Wiley & Sons, 2008.
Note : à paraître.
Mots-clés : Problèmes Inverses, Approche bayésienne, Traitement d'image.
Copyright : ISTE Ltd
@INCOLLECTION{descombes08,
|
| author |
= |
{Descombes, X. and Goussard, Y.}, |
| title |
= |
{Unsupervised problems}, |
| year |
= |
{2008}, |
| booktitle |
= |
{Bayesian approach to inverse problems}, |
| editor |
= |
{J. Idier}, |
| publisher |
= |
{ISTE and John Wiley & Sons}, |
| url |
= |
{http://eu.wiley.com/WileyCDA/WileyTitle/productCd-1848210329.html}, |
| pdf |
= |
{http://onlinelibrary.wiley.com/doi/10.1002/9780470611197.ch8/summary}, |
| keyword |
= |
{Problèmes Inverses, Approche bayésienne, Traitement d'image} |
| } |
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