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Autor:
Lafontaine, J.-C., Boucher, J., Giovannelli, J., Petit, J., Outteryck, O., Balagny, S., Zéphir, H.
Publikováno v:
In Revue Neurologique October 2023 179(8):894-901
Publikováno v:
In Signal Processing March 2020 168
We describe regularized methods for image reconstruction and focus on the question of hyperparameter and instrument parameter estimation, i.e. unsupervised and myopic problems. We developed a Bayesian framework that is based on the \post density for
Externí odkaz:
http://arxiv.org/abs/1211.3603
This paper is devoted to the problem of sampling Gaussian fields in high dimension. Solutions exist for two specific structures of inverse covariance : sparse and circulant. The proposed approach is valid in a more general case and especially as it e
Externí odkaz:
http://arxiv.org/abs/1105.5887
We investigate super-resolution methods for image reconstruction from data provided by a family of scanning instruments like the Herschel observatory. To do this, we constructed a model of the instrument that faithfully reflects the physical reality,
Externí odkaz:
http://arxiv.org/abs/1103.3698
Publikováno v:
Signal Processing, vol. 86, pp. 2479-2494, 2006
Combining fast MR acquisition sequences and high resolution imaging is a major issue in dynamic imaging. Reducing the acquisition time can be achieved by using non-Cartesian and sparse acquisitions. The reconstruction of MR images from these measurem
Externí odkaz:
http://arxiv.org/abs/0908.3252
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing, vol. 39, no. 10, pp. 2194-2202, October 2001
This paper is devoted to adaptive long autoregressive spectral analysis when (i) very few data are available, (ii) information does exist beforehand concerning the spectral smoothness and time continuity of the analyzed signals. The contribution is f
Externí odkaz:
http://arxiv.org/abs/0908.3259
Publikováno v:
IEEE Trans. Image Processing, vol. 15, no. 11, pp. 3325-3337, November, 2006
Super-resolution (SR) techniques make use of subpixel shifts between frames in an image sequence to yield higher-resolution images. We propose an original observation model devoted to the case of non isometric inter-frame motion as required, for inst
Externí odkaz:
http://arxiv.org/abs/0908.3250
Publikováno v:
IEEE Transactions on Signal Processing, vol. 50, no. 12, pp. 2905-2914, December, 2002
This paper deals with the estimation of a sequence of frequencies from a corresponding sequence of signals. This problem arises in fields such as Doppler imaging where its specificity is twofold. First, only short noisy data records are available (ty
Externí odkaz:
http://arxiv.org/abs/0908.3258