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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
API of the PSFs at different threshold levels. As before, each plot corresponds to one scenario: (a) defect on axis of symmetry with , (b) left defect with , (c) defect on axis of symmetry with , (d) left defect with .