Abstract
A technique for unwrapping subsampled phase maps is presented. The subsampled phase map is obtained by standard phase-shifting methods that use subsampled interferograms. The technique then estimates the wrapped local curvature of the subsampled phase map. This local curvature is then low-pass filtered with a free-boundary low-pass filter to reduce phase noise. Finally, the estimated local curvature of the wave front is integrated by the use of a least-squares technique to obtain the searched continuous wave front.
© 1996 Optical Society of America
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