Numerical image processing applied to the solar corona |
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| Authors: | J M Malherbe J C Noëns Th Roudier |
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| Institution: | (1) Observatoire de Paris, Section de Meudon, DASOP (LA 326 du CNRS), 92195 Meudon-Cedex, France;(2) Observatoire du Pic du Midi et de Toulouse, LA 285 du CNRS, 65200 Bagnères-de-Bigorre, France |
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| Abstract: | Numerical data processing is applied to the high-resolution images-of the solar corona obtained with the 20 cm coronagraph of the Pic du Midi observatory. Two complementary methods are proposed to solve some classical difficulties usually met in the morphological analysis of the solar corona, namely the brightness gradient in the inner and medium corona, the low contrast of numerous emissive regions and the superimposition along the line of sight of different structures. The methods which are described in this paper may help to resolve the complex coronal active regions into fine structures which is now necessary to interpret all observed corona data. |
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