Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006coska..36..131d&link_type=abstract
Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 36, no. 3, p. 131-148.
Astronomy and Astrophysics
Astronomy
21
Sun, Corona, High Angular Resolution, Numerical Data Analysis Method, Image Processing
Scientific paper
A new numerical method of image processing suitable for visualization of corona images taken during total solar eclipses is presented. This method allows us to study both small- and large-scale coronal structures that remain invisible on original images because of their very high dynamic range of the coronal brightness. The method is based on the use of adaptive filters inspired by human vision and the sensitivity of resulting images is thus very close to that of the human eye during an eclipse. A high precision alignment method for white-light corona images is also discussed. The proposed method highly improves a widely used unsharp masking method employing a radially blurred mask. The results of these numerical image processing techniques are illustrated by a series of images taken during eclipses of the last decade. The method minimizes the risk of processing artifacts.
Druckmuller Miloslav
Minarovjech Milan
Rusin Vojtech
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