Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Automatic removal of false image stars in disk-resolved images of the
  Cassini Imaging Science Subsystem   Taking a large amount of images, the Cassini Imaging Science Subsystem (ISS)
has been routinely used in astrometry. In ISS images, disk-resolved objects
often lead to false detection of stars that disturb the camera pointing
correction. The aim of this study was to develop an automated processing method
to remove the false image stars in disk-resolved objects in ISS images. The
method included the following steps: extracting edges, segmenting boundary
arcs, fitting circles and excluding false image stars. The proposed method was
tested using 200 ISS images. Preliminary experimental results show that it can
remove the false image stars in more than 95% of ISS images with disk-resolved
objects in a fully automatic manner, i.e. outperforming the traditional circle
detection based on Circular Hough Transform (CHT) by 17%. In addition, its
speed is more than twice as fast as that of the CHT method. It is also more
robust (no manual parameter tuning is needed) when compared with CHT. The
proposed method was also applied to a set of ISS images of Rhea to eliminate
the mismatch in pointing correction in automatic procedure. Experiment results
showed that the precision of final astrometry results can be improve by roughly
2 times than that of automatic procedure without the method. It proved that the
proposed method is helpful in the astrometry of ISS images in fully automatic
manner.

9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas