Simultaneous depth determination of multiple objects by focus analysis in digital holography

概要

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Focus analysis techniques from computer vision are applied to digital holography to determine the depth(range) of multiple objects and their surfaces from a single hologram capture. With this method thedepths of objects can be determined from a single hologram capture without the need for manual focusingand without prior information on object location. Variance and the Laplacian of Gaussian are analyzed asfocus measures, and techniques are proposed for focus plane determination from the focus measurecurves. The algorithm is described in detail and demonstrated through simulation and optical experiment.