Automated Detection of Coronal Loops Using a Wavelet Transform Modulus Maxima Method

We propose and test a wavelet transform modulus maxima method for the automated detection and extraction of coronal loops in extreme ultraviolet images of the solar corona. This method decomposes an image into a number of size scales and tracks enhanced power along each ridge corresponding to a coronal loop at each scale. We compare the results across scales and suggest the optimum set of parameters to maximize completeness, while minimizing detection of noise. For a test coronal image, we compare the global statistics (e.g. number of loops at each length) to previous automated coronal-loop detection algorithms.

[1]  The kinematics of coronal mass ejections using multiscale methods , 2009, 0901.3392.

[2]  Jack Ireland,et al.  Statistics of Active Region Complexity: A Large-Scale Fractal Dimension Survey , 2005 .

[3]  Jay A. Bookbinder,et al.  The transition region and coronal explorer , 1998 .

[4]  Fahima Nekka,et al.  Morphological Analysis of H I Features. II. Wavelet-based Multifractal Formalism , 2006 .

[5]  Jong Kwan Lee,et al.  Oriented connectivity-based method for segmenting solar loops , 2006, Pattern Recognit..

[6]  Comparison of Five Numerical Codes for Automated Tracing of Coronal Loops , 2008 .

[7]  W. Neupert,et al.  EIT: Extreme-ultraviolet Imaging Telescope for the SOHO mission , 1995 .

[8]  C. J. Wolfson,et al.  Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) , 2008 .

[9]  Russell J. Hewett,et al.  Multifractal Properties of Evolving Active Regions , 2008 .

[10]  Stéphane Mallat,et al.  Characterization of Signals from Multiscale Edges , 2011, IEEE Trans. Pattern Anal. Mach. Intell..

[11]  E. Christian,et al.  The STEREO Mission: An Introduction , 2008 .

[12]  Chelsi J. Snow,et al.  Muscle development is disrupted in zebrafish embryos deficient for fibronectin , 2008, Developmental dynamics : an official publication of the American Association of Anatomists.

[13]  A. Arneodo,et al.  A wavelet-based method for multifractal image analysis. I. Methodology and test applications on isotropic and anisotropic random rough surfaces , 2000 .

[14]  R. T. James McAteer,et al.  Turbulence, complexity, and solar flares , 2009, 0909.5636.

[15]  Stéphane Mallat,et al.  Singularity detection and processing with wavelets , 1992, IEEE Trans. Inf. Theory.

[16]  Jack Ireland,et al.  The Bursty Nature of Solar Flare X-Ray Emission , 2007 .

[17]  A. Arneodo,et al.  Chromosome neighborhood composition determines translocation outcomes after exposure to high-dose radiation in primary cells , 2007, Chromosome Research.

[18]  D. Engelman,et al.  Image analysis of soft-tissue in-growth and attachment into highly porous alumina ceramic foam metals. , 2009, Medical engineering & physics.

[19]  B. Inhester,et al.  Segmentation of Loops from Coronal EUV Images , 2008, 0801.3240.

[20]  Jack Ireland,et al.  Automated Boundary-extraction And Region-growing Techniques Applied To Solar Magnetograms , 2005 .

[21]  A. Arneodo,et al.  Chromosome territories have a highly nonspherical morphology and nonrandom positioning , 2007, Chromosome Research.

[22]  Francis P. Keenan,et al.  Ultraviolet Oscillations in the Chromosphere of the Quiet Sun , 2004 .

[23]  T. Neukirch,et al.  A Quantitative Method to Optimise Magnetic Field Line Fitting of Observed Coronal Loops , 2003 .