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Zero-order noise suppression with various space-shifting manipulations of reconstructed images in digital holography |
Applied Optics, Vol. 50, Issue 34, pp. H56-H61 (2011)
http://dx.doi.org/10.1364/AO.50.000H56
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Abstract
In this paper, we describe various numerical space-shifting manipulations of the reconstructed images to remove the dc noise in the reconstruction, in terms of the periodicity characteristics of images in digital holography. The theoretical interpretation on different reconstruction periods of the image and the dc noise is described in detail for the first time, to the best of our knowledge. It is related to CCD sampling periods or frequencies for the fringes and the dc term of a hologram. With the calculations of Hadamard product of two different spatially shifted images and subsequent extraction of the root of it, the dc noise can be suppressed effectively and a clear image with the original intensity contrast can be obtained at the center in the hologram reconstruction, particularly when the image and the dc noise are completely or partially superposed with each other. The experiments for both in-line and off-axis imaging cases show that all results are completely consistent with theoretical predictions.
© 2011 Optical Society of America
OCIS Codes
(090.1995) Holography : Digital holography
(070.2025) Fourier optics and signal processing : Discrete optical signal processing
(100.3008) Image processing : Image recognition, algorithms and filters
ToC Category:
Holographic Reconstruction, Display, and Projection
History
Original Manuscript: May 31, 2011
Revised Manuscript: July 21, 2011
Manuscript Accepted: September 9, 2011
Published: October 28, 2011
Virtual Issues
Digital Holography and 3D Imaging 2011 (2011) Applied Optics
Citation
Jian Wu, Ming Feng Lu, Yan Chao Dong, Ming Zheng, Meng Huang, and Yi Nan Wu, "Zero-order noise suppression with various space-shifting manipulations of reconstructed images in digital holography," Appl. Opt. 50, H56-H61 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-34-H56
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