Abstract
The wealth of information regarding the structure and distribution of magnetic fields and plasmas embedded in images of the solar corona taken in the visible wavelength range and/or the extreme ultraviolet (EUV), covers several orders of magnitude in brightness, in the radial and azimuthal directions. As such, they present serious visualization challenges. These can only be revealed with the use of image processing tools. This presentation will focus on results from two recently developed approaches: (1) The Adaptive Circular High-pass Filter, ACHF, and the Normalized Radial Gradient Filter, NRGF, which are ideal for limb observations of the corona made in the visible wavelength range during total solar eclipses or with coronagraphs. (2) The Noise Adaptive Fuzzy Equalization (NAFE) and the multi-scale Gaussian normalization process (MGN), suitable for the visualization of fine structures in EUV images. These methods yield artifact-free images and uncover details that are hidden in the original unprocessed images. Such details have led to the discovery of new features that are essential for exploring the dynamics and thermodynamics of structures in the solar corona.
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References
Brueckner, G.E., et al.: The Large Angle Spectroscopic Coronagraph. Solar Phys. 162, 357–402 (1995)
Druckmüller, M., Rušin, V., Minarovjech, M.: A New Numerical Method of Total Solar Eclipse Photography Processing. Contributions of the Astronomical Observatory Skalnate Pleso 36, 131–148 (2006)
Druckmüller, M.: A Noise Adaptive Fuzzy Equalization Method for Processing Solar Extreme Ultraviolet Images. Astrophys. J. Suppl. 2017, 25 (5pp) (2013)
Druckmüller, M., Habbal, S.R., Morgan, H.: Discovery of a New Class of Coronal Structures in White Light Eclipse Images. Astrophys. J. 785, 14 (7pp) (2014)
Druckmüllerová, H., Morgan, H., Habbal, S.R.: Enhancing Coronal Structures with the Fourier Normalizing-Radial-Graded Filter. Astrophys. J. 737, 88 (10pp) (2011)
Habbal, S.R., Druckmüller, M., Morgan, H., et al.: Total Solar Eclipse Observations of Hot Prominence Shrouds. Astrophys. J. 719, 1362–1369 (2010)
Habbal, S.R., et al.: Localized Enhancements of Fe  + 10 Density in the Corona as Observed in Fe XI 789.2 nm during the 2006 March 29 Total Solar Eclipse. Astrophys. J. 663, 598–609 (2007)
Lemen, J.R., et al.: The Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO). Solar Phys. 172, 17–40 (2012)
Morgan, H., Druckmüller, M.: Multi-scale Gaussian Normalization for Image Process: Application to Solar EUV Observations. Solar Phys. (in press, 2014)
Morgan, H., Habbal, S.R., Woo, R.: The Depiction of Coronal Structure in White Light Images. Solar Phys. 236, 263–272 (2006)
Pesnell, W.D., Thompson, B.J., Chamberlain, P.C.: The Solar Dynamics Observatory. Solar Phys. 275, 3–15 (2012)
Pratt, W.K.: Digital Image Processing, 4th edn. John Wiley & Sons (2004)
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Habbal, S.R., Druckmüller, M., Morgan, H. (2014). Role of Image Processing in Solar Coronal Research. In: Barneva, R.P., Brimkov, V.E., Šlapal, J. (eds) Combinatorial Image Analysis. IWCIA 2014. Lecture Notes in Computer Science, vol 8466. Springer, Cham. https://doi.org/10.1007/978-3-319-07148-0_3
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DOI: https://doi.org/10.1007/978-3-319-07148-0_3
Publisher Name: Springer, Cham
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