Change point detection and image segmentation for time series of astrophysical images
Cong Xu,
Hans Moritz Günther,
Vinay L. Kashyap
et al.
Abstract:Many astrophysical phenomena are time-varying, in the sense that their intensity, energy spectrum, and/or the spatial distribution of the emission suddenly change. This paper develops a method for modeling a time series of images. Under the assumption that the arrival times of the photons follow a Poisson process, the data are binned into 4D grids of voxels (time, energy band, and x-y coordinates), and viewed as a time series of non-homogeneous Poisson images. The method assumes that at each time point, the co… Show more
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