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In this paper, we present an automatic tracking algorithm to study the evolution of G-band bright points (GBPs) in the solar photosphere. A data set of 142 G-band speckled images obtained with the Dutch Open Telescope (DOT) on October 19, 2005 is used. The LMD algorithm is used to identify the GBPS in every image of the sequence. A three dimensional space-time cube is adopted to track the isolated...
The solar surface is covered by granulations. Segmenting granular elements are playing an important role in analyzing granules motions and evolutions. In this paper, we present a novel method, using morphological reconstruction and watershed transform, to segment granules in the solar photosphere. First a morphological filtering of opening-by-reconstruction and closing-by-reconstruction is used to...
Photospheric bright points (BPs) are a small-scale feature on the solar surface. Studying their characteristics may reveal the problems on coronal hearting, local dynamo theory and relation of magnetic field. In the present paper, an automatic algorithm, employing Laplacian and morphological dilation technique, is utilized to identify the BPs. Two data sets are derived from the Dutch Open Telescope...
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