Sparse reconstructions of overlapping three-dimensional point spread functions using overcomplete dictionaries

preprint2013arXivOpen access

Abstract

When a single molecule is detected in a wide-field microscope, the image approximates the point spread function of the system. However, as the distribution of molecules becomes denser and their images begin to coincide, existing solutions to determine the number of molecules present and their precise three-dimensional locations can tolerate little to no overlap. A solution to this problem involving matched optical and digital techniques, as here proposed, is critical to increase the allowable labeling density and to accelerate single-molecule localization microscopy.

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