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Sensors 2011, 11(10), 9160-9181; doi:10.3390/s111009160
Article

Efficient Phase Unwrapping Architecture for Digital Holographic Microscopy

1,* , 1
 and
2,*
1 Department of Computer Science and Information Engineering, National Taiwan Normal University, Taipei, 117, Taiwan 2 Institute of Electro-Optical Science and Technology, National Taiwan Normal University, Taipei, 117, Taiwan
* Authors to whom correspondence should be addressed.
Received: 4 August 2011 / Revised: 14 September 2011 / Accepted: 15 September 2011 / Published: 27 September 2011
(This article belongs to the Section Physical Sensors)
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Abstract

This paper presents a novel phase unwrapping architecture for accelerating the computational speed of digital holographic microscopy (DHM). A fast Fourier transform (FFT) based phase unwrapping algorithm providing a minimum squared error solution is adopted for hardware implementation because of its simplicity and robustness to noise. The proposed architecture is realized in a pipeline fashion to maximize through put of thecomputation. Moreover, the number of hardware multipliers and dividers are minimized to reduce the hardware costs. The proposed architecture is used as a custom user logic in a system on programmable chip (SOPC) for physical performance measurement. Experimental results reveal that the proposed architecture is effective for expediting the computational speed while consuming low hardware resources for designing an embedded DHM system.
Keywords: phase unwrapping; digital holographic microscopy; FPGA; reconfigurable computing; system on programmable chip phase unwrapping; digital holographic microscopy; FPGA; reconfigurable computing; system on programmable chip
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hwang, W.-J.; Cheng, S.-C.; Cheng, C.-J. Efficient Phase Unwrapping Architecture for Digital Holographic Microscopy. Sensors 2011, 11, 9160-9181.

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