Resolution enhancement of spectrum normalization in synthetic aperture digital holographic microscopy

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Title:	Resolution enhancement of spectrum normalization in synthetic aperture digital holographic microscopy
Authors:	Lai, Xin-Ji Tu, Han-Yen Wu, Chung-Hsin Lin, Yu-Chih Cheng, Chau-Jern
Contributors:	Dept Elect Engn
Keywords:	LENSLESS FOURIER HOLOGRAPHY OFF-AXIS HOLOGRAMS COMPLEX FIELDS IMAGING METHOD SUPERRESOLUTION
Date:	2015-01
Issue Date:	2015-11-03 16:56:39 (UTC+8)
Abstract:	This study describes the overlapping of spatial frequency bands for synthetic aperture in digital holography using spectrum normalization to effectively enhance the spatial resolutions of image reconstruction. Synthesized spectrum swelling induced by excessive frequency overlaps can be normalized through the inverse apodization of an adjustable window function, which is similar to the effects of suppressing low-frequency expansion and strengthening high-frequency components of the reconstructed images. The results indicated that using the normalized spectrum synthesis that requires only a few frequency bands effectively enhances the spatial resolution and phase sensitivity of reconstructed images in digital holographic microscopy. (C) 2014 Optical Society of America
Relation:	APPLIED OPTICS 卷: 54 期: 1 頁碼: A51-A58
Appears in Collections:	[Department of Electrical Engineering ] journal articles

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