A New Coronal Loop Identified Technology Based on the Phase Congruency Detective Method
Abstract
We test a phase congruency method for automatically extracting coronal loops from the coronal observation data, and propose a new coronal loop detective method. On account of smooth changes of the direction along coronal loops, the possible direction of loops is restricted in a small range for improving the detective result. Beyond that, inspired by the structural characteristics of coronal loops, we firstly suggest that both the change of result directions and the flux of result points can be used to terminate the loop detection. Finally, several coronal images are detected by our loop extracting method, and the result indicates that the congruency enhanced image is exactly suitable for coronal detection and extraction, and our new loop detective method can also extract most of loops in the test images completely and accurately. Besides that, our research also suggests that the characteristics of coronal loop should be a significant reference for improving other loop detective methods.
- Publication:
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Acta Astronomica Sinica
- Pub Date:
- July 2016
- Bibcode:
- 2016AcASn..57..402L
- Keywords:
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- sun: corona;
- techniques: image processing;
- methods: observational