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All next-generation ground-based and space-based solar telescopes require a good quality-assessment metric to evaluate their imaging performance. In this paper, a new image quality metric, the median filter-gradient similarity (MFGS) is proposed for photospheric images. MFGS is a no-reference/blind objective image-quality metric (IQM) by a measurement result between 0 and 1 and has been performed...
Image quality assessment method is a hot issue that aims to give an objective assessment value that in line with the human's subject perception or certain demand of applications. This paper summarized and compared several quality assessment methods that have been widely used in astronomical optical images, including Strehl Ratio, FWHM, Spectral ratio, RMS, Fisher information, entropy function and...
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