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Nicolas Gac

2 accepted papers

2017

X-ray Computed Tomography simultaneous image reconstruction and contour detection using a hierarchical Markovian model

Li Wang, Ali Mohammad-Djafari, Nicolas Gac
ICASSP 2017accepted

The 3D X-ray Computed Tomography (CT) is used in many domains. In medical imaging and industrial Non Destructive Testing (NDT) applications, this technique becomes of great interest. In these applications, very often, we need not only to reconstruct the image, but also to detect the contours between…

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2016

Computed tomography reconstruction based on a hierarchical model and variational Bayesian method

Li Wang, Ali Mohammad-Djafari, Nicolas Gac, Mircea Dumitru
ICASSP 2016accepted

In order to improve the quality of X-ray Computed Tomography (CT) reconstruction for Non Destructive Testing (NDT), we propose a hierarchical prior modeling with a Bayesian approach. In this paper we present a new hierarchical structure for the inverse problem of CT by using a multivariate Student-t…

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