Abstract
We propose, in the framework of high angular resolution imaging, a new image reconstruction technique denoted as Power Spectrum Extended (PSE). This method allows to perform the reconstruction of point-like and extended objects from a series of short-exposure frames, and is well adapted to post-adaptive optics images and/or small diameter telescopes. The algorithm works in the Fourier domain. It combines information from the average power spectrum of images with phase information estimated from an ad hoc shift-and-add process. It can be used together with a Lucky Imaging selection algorithm. It gives very encouraging results, even on very extended objects (larger than the isoplanatic angle) and at low light level (photon counting). In this communication, we present results obtained on astronomical objects as well as artificial satellites. We also show a comparison of performance with a reference Lucky Imaging technique.
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