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The Geometry of the Generalized Gamma Manifold and an Application to Medical Imaging

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  • Sana Rebbah

    (INSERM ToNIC, Université de Toulouse, CEDEX 3, 31024 Toulouse, France
    ENAC, Université de Toulouse, CEDEX 4, 31055 Toulouse, France)

  • Florence Nicol

    (ENAC, Université de Toulouse, CEDEX 4, 31055 Toulouse, France)

  • Stéphane Puechmorel

    (ENAC, Université de Toulouse, CEDEX 4, 31055 Toulouse, France)

Abstract

The Fisher information metric provides a smooth family of probability measures with a Riemannian manifold structure, which is an object in information geometry. The information geometry of the gamma manifold associated with the family of gamma distributions has been well studied. However, only a few results are known for the generalized gamma family that adds an extra shape parameter. The present article gives some new results about the generalized gamma manifold. This paper also introduces an application in medical imaging that is the classification of Alzheimer’s disease population. In the medical field, over the past two decades, a growing number of quantitative image analysis techniques have been developed, including histogram analysis, which is widely used to quantify the diffuse pathological changes of some neurological diseases. This method presents several drawbacks. Indeed, all the information included in the histogram is not used and the histogram is an overly simplistic estimate of a probability distribution. Thus, in this study, we present how using information geometry and the generalized gamma manifold improved the performance of the classification of Alzheimer’s disease population.

Suggested Citation

  • Sana Rebbah & Florence Nicol & Stéphane Puechmorel, 2019. "The Geometry of the Generalized Gamma Manifold and an Application to Medical Imaging," Mathematics, MDPI, vol. 7(8), pages 1-15, July.
  • Handle: RePEc:gam:jmathe:v:7:y:2019:i:8:p:674-:d:252674
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    References listed on IDEAS

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    1. Le Brigant, Alice & Puechmorel, Stéphane, 2019. "Quantization and clustering on Riemannian manifolds with an application to air traffic analysis," Journal of Multivariate Analysis, Elsevier, vol. 173(C), pages 685-703.
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