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Real-time digital holographic microscopy using the graphic processing unit

Tomoyoshi Shimobaba, Yoshikuni Sato, Junya Miura, Mai Takenouchi, Tomoyoshi Ito
Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-City, Yamagata 992-8510 Japan
Opt. Express, Vol. 16, No. 16. (4 August 2008), pp. 11776-11781

@article{shimobaba2008real,

   title={Real-time digital holographic microscopy using the graphic processing unit},

   author={Shimobaba, T. and Sato, Y. and Miura, J. and Takenouchi, M. and Ito, T.},

   journal={Optics Express},

   volume={16},

   number={16},

   pages={11776–11781},

   issn={1094-4087},

   year={2008},

   publisher={Optical Society of America}

}

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Digital holographic microscopy (DHM) is a well-known powerful method allowing both the amplitude and phase of a specimen to be simultaneously observed. In order to obtain a reconstructed image from a hologram, numerous calculations for the Fresnel diffraction are required. The Fresnel diffraction can be accelerated by the FFT (Fast Fourier Transform) algorithm. However, real-time reconstruction from a hologram is difficult even if we use a recent central processing unit (CPU) to calculate the Fresnel diffraction by the FFT algorithm. In this paper, we describe a real-time DHM system using a graphic processing unit (GPU) with many stream processors, which allows use as a highly parallel processor. The computational speed of the Fresnel diffraction using the GPU is faster than that of recent CPUs. The real-time DHM system can obtain reconstructed images from holograms whose size is 512×512 grids in 24 frames per second.
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