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- W1588748713 abstract "This paper presents two new methods for robust parameter estimation of mixtures in the context of MR data segmentation. The head is constituted of different types of tissue that can be modeled by a finite mixture of multivariate Gaussian distributions. Our goal is to estimate accurately the statistics of desired tissues in presence of other ones of lesser interest. These latter can be considered as outliers and can severely bias the estimates of the former. For this purpose, we introduce a first method, which is an extension of the EM-algorithm, that estimates parameters of Gaussian mixtures but incorporates an outlier rejection scheme which allows to compute the properties of the desired tissues in presence of atypical data. The second method is based on genetic algorithms and is well suited for estimating the parameters of mixtures of different kind of distributions. Experiments on synthetic and real MR data show that accurate estimates of the gray and white matters parameters are computed." @default.
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- W1588748713 date "1996-09-01" @default.
- W1588748713 modified "2023-10-17" @default.
- W1588748713 title "New approaches to robust Gaussian mixture estimation for brain MRI" @default.
- W1588748713 doi "https://doi.org/10.5281/zenodo.36172" @default.
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