Digital Holograms Faster than Ever

by scott on April 30, 2011

in Case Studies

REAL3D is a digital holography project funded by the EU and brings together nine participants from academia and industry under the FP7.

As part of the project Nitesh Pandey, Damien Kelly, Bryan Hennelly and Thomas Naughton from the National University of Ireland, Maynooth demonstrate utilizing pre-computation and quantization of chirp matrices with GPUs running Jacket from AccelerEyes speeds up the reconstructions of digital holograms.

Digital holography is a powerful imaging technique with many new applications like true 3D display. It allows the capture of both amplitude and phase information of the light reflected off the surface of 3D objects. Researchers at the National University of Ireland, Maynooth are developing techniques based on digital holography for 3D display applications.

Reconstruction of large digital holograms can be computationally intensive to generate on CPUs, but GPUs running Jacket offer amazing possibilities.

Here’s how it works:

Check out the reconstruction on video:

The movie shows the propagation of a digital hologram from the camera plane to the object plane.
They run Fresnel transforms employing the Fourier Transform algorithm on an “ordinary computer” with these two set-ups:

  1. CPU: Intel Pentium 4, 3.0GHz, 1GB RAM
  2. GPU: NVIDIA GeForce with AMD Athlon 64 X2, 2.31GHz, 2GB RAM

Here’s the set-up:

Now check out the execution time comparison between CPUs and GPUs:

Without a doubt, GPUs running Jacket get your holograms reconstructed faster. The speedups get better and better as your hologram size increases. Precomputed chirp matrixes speed up your reconstructions as well. And when GPUs running Jacket combine with the precomputed chirp matrixes on larger holograms the speedups just get better. It’s like a gift that keeps on giving.

Special thanks to Nitesh Pandey, Damien Kelly, Bryan Hennelly and Thomas Naughton from the National University of Ireland, Maynooth for all their awesome work. We all love holograms. We also want to thank the EU’s FP7 for funding the REAL3D project. They folks are doing outstanding work we are so happy to see there is funding to help them continue to create greatness.

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