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: http://num-meth.srcc.msu.ru/english/zhurnal/tom_2005/v6r124.html
Дата изменения: Mon Jul 3 16:50:02 2006 Дата индексирования: Mon Oct 1 22:40:11 2012 Кодировка: |
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"Correction of solar dopplergrams' large-scale flatfield" Patrickeyev I.A., Mashnich G.P., Khlystova A.I., Zhang H. |
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The authors have proposed and compared three different methods of large-scale flatfield correction (time averaging, Fourier filtering, and wavelet-based filtering). As an example, the real dopplergram of the velocity field in a solar active region obtained at the Huairou Solar Observing Station of National Astronomical Observatories of China has been processed. It is shown that any of the applied methods can improve the visual quality of the image. A quantitative comparison of the proposed methods was performed by evaluating the heterogeneity of the images. |
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Patrickeyev I.A. - Institute of Continuum Mechanics, Russian Academy of Sciences, Korolyova 1, 614013, Perm, Russia;
e-mail: pat@icmm.ru
Mashnich G.P., Khlystova A.I. - Institute of Solar and Terrestrial Physics, Russian Academy of Sciences Lermontova 126, 664033, Irkutsk, Russia; e-mail: mashnich@iszf.irk.ru, ancha-k@nm.ru Zhang H. - National Astronomical Observatories, Chinese Academy of Sciences, 100012, Beijing, China; e-mail: hzhang@bao.ac.cn |