Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Identification of coronal holes and filament channels in SDO/AIA
  193\r{A} images via geometrical classification methods   In this study, we describe and evaluate shape measures for distinguishing
between coronal holes and filament channels as observed in Extreme Ultraviolet
(EUV) images of the Sun. For a set of well-observed coronal hole and filament
channel regions extracted from SDO/AIA 193\r{A} images we analyze their
intrinsic morphology during the period 2011 to 2013, by using well known shape
measures from the literature and newly developed geometrical classification
methods. The results suggest an asymmetry in the morphology of filament
channels giving support for the sheared arcade or weakly twisted flux rope
model for filaments. We find that the proposed shape descriptors have the
potential to reduce coronal hole classification errors and are eligible for
screening techniques in order to improve the forecasting of solar wind
high-speed streams from coronal hole observations in solar EUV images.

12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math