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EURASIP Journal on Advances in Signal Processing
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Multiband Segmentation of a Spectroscopic Line Data Cube: Application to the HI Data Cube of the Spiral Galaxy NGC 4254

EURASIP Journal on Advances in Signal Processing volume 2005, Article number: 921039 (2005) Cite this article

Abstract

A new method for the multiband segmentation of a spectroscopic line data cube is presented. This method is intended to help astronomers to handle complex spectroscopic line data cubes where the inspection of the channel and moment maps is difficult. Due to the Hughes phenomenon, the number of input images for the segmentation process is limited. Therefore, the spectrum of each pixel is fitted with a mixture of 6 Gaussians with fixed mean values and variances. The maps of the Gaussian weights are the input for a Markovian segmentation algorithm. The final segmentation map contains classes of pixels with similar spectral line profiles. The application of our method to the HI data cube of the Virgo spiral galaxy NGC 4254 shows that kinematically interesting regions can be detected and masked by our method.

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Authors and Affiliations

  1. Laboratoire des Sciences de l'Image, de l'Informatique et de la Télédétection (LSIIT) UMR 7005, Université Louis Pasteur (Strasbourg 1), Boulevard Sébastien Brant, B.P. 10413, Illkirch, Cedex, 67412, France

    Farid Flitti & Christophe Collet

  2. Centre de Données Astronomiques de Strasbourg (CDS), UMR 7550, Observatoire Astronomique de Strasbourg, 11 rue de l'Université, Strasbourg, 67000, France

    Bernd Vollmer & François Bonnarel

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  1. Farid Flitti
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  2. Christophe Collet
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  3. Bernd Vollmer
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  4. François Bonnarel
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Correspondence to Farid Flitti.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Flitti, F., Collet, C., Vollmer, B. et al. Multiband Segmentation of a Spectroscopic Line Data Cube: Application to the HI Data Cube of the Spiral Galaxy NGC 4254. EURASIP J. Adv. Signal Process. 2005, 921039 (2005). https://doi.org/10.1155/ASP.2005.2546

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  • DOI: https://doi.org/10.1155/ASP.2005.2546

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