Detection and tracking of coronal mass ejections based on supervised segmentation and level set

Coronal mass ejection (CME) events refer to the appearance of a new, discrete, white-light feature (with outward velocity) in a coronagraph. The huge amount of data provided by the pertinent instruments onboard the Solar and Heliospheric Observatory (SOHO) and, most recently, the Solar Terrestrial R...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Goussies, N.A., Mejail, M.E., Jacobo, J., Stenborg, G.
Formato: JOUR
Materias:
Coronal mass ejections
Level sets
Supervised segmentation
Texture
Co-occurrence-matrix
Coronal mass ejection
Detection and tracking
Level Set
Level set implementation
Motion equations
Novel methods
Region competition
Solar and heliospheric observatories
Solar-terrestrial relations
Texture information
White light
Boundary layer flow
Buildings
Competition
Equations of motion
Observatories
Textures
Level measurement
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01678655_v31_n6_p496_Goussies
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Coronal mass ejection (CME) events refer to the appearance of a new, discrete, white-light feature (with outward velocity) in a coronagraph. The huge amount of data provided by the pertinent instruments onboard the Solar and Heliospheric Observatory (SOHO) and, most recently, the Solar Terrestrial Relations Observatory (STEREO) makes the human-based detection of such events excessively time consuming. Although several algorithms have been proposed to address this issue, there is still lack of universal consensus about their reliability. This work presents a novel method for the detection and tracking of CMEs as recorded by the LASCO instruments onboard SOHO. The algorithm we developed is based on level set and region competition methods, the CMEs texture being characterized by their co-occurrence matrix. The texture information is introduced in the region competition motion equations, and in order to evolve the curve, a fast level set implementation is used. © 2009 Elsevier B.V. All rights reserved.

Ejemplares similares