Daniel Benjamin Taylor
Digital holograms, when combined with tracer particles, can be used for examining otherwise-invisible fluid flows. These holograms can be captured with standard digital imaging equipment, however processing them to extract tracer or particle locations is computationally expensive. Exacerbating the issue is that hundreds or thousands of holograms must be reconstructed to analyze a single flow.Presented […]
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M. Ploschner, B. Straka, K. Dholakia, T. Cizmar
We present a GPU accelerated toolbox for shaping the light propagation through multimode fibre using a spatial light modulator (SLM). The light is modulated before being coupled to the proximal end of the fibre in order to achieve arbitrary light patterns at the distal end of the fibre. First, the toolbox optimises the acquisition time […]
Koki Murano, Tomoyoshi Shimobaba, Atsushi Sugiyama, Naoki Takada, Takashi Kakue, Minoru Oikawa, Tomoyoshi Ito
We report fast computation of computer-generated holograms (CGHs) using Xeon Phi coprocessors, which have massively x86-based processors on one chip, recently released by Intel. CGHs can generate arbitrary light wavefronts, and therefore, are promising technology for many applications: for example, three-dimensional displays, diffractive optical elements, and the generation of arbitrary beams. CGHs incur enormous computational […]
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Naoki Takada, Hiroaki Niwase, Hiromitsu Araki, Hirotaka Nakayama, Atsushi Sugiyama, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito
We report a real-time electroholography using compact system composed of a multi-GPU environmental PC with four GPUs of Kepler architecture. Finally, our system can calculate 1,920×1,024 pixel CGH from the 3D object composed of 10,240 points in 40.3ms.
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Koki Murano, Tomoyoshi Shimobaba, Takashi Kakue, Tomoyoshi Ito
Using parallel computing is an effective way to accelerate computer-generated hologram (CGH) calculation. In this paper, we implemented various CGH algorithms on Intel Xeon Phi Coprocessors. In the best case, we succeeded the CGH calculations 12-times faster than a CPU.
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Carlos Trujillo, Jorge Garcia-Sucerquia
The huge video games market has propelled the development of hardware and software focused on making the game environment more realistic. Among such developments are graphics processing units (GPUs). These devices are intended to alleviate the central processing unit (CPU) of the host computer from the computation that creates "life" for video games. The GPUs […]
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Joong-Seok Song, Jungsik Park, Sungwoo Kim, Jong-Il Park
Digital hologram generation methods commonly use computer generated hologram (CGH) algorithm. However, it requires complicated computation. Thus, this paper proposes an optimization method for a fast generation of digital hologram. The proposed method uses CUDA and OpenMP for multi-GPU. Also, it applies various optimization methods (variable fixation, vectorization, and loop unrolling) to a CGH algorithm. […]
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Fahri Yaras, Hoonjong Kang, Levent Onural
A real-time multi-GPU color holographic video display system computes holograms from 3D video of a rigid object. System has three main stages; client, server and optics. 3D coordinate and texture information are kept in client and sent online to the server through the network. In the server stage, with the help of the parallel processing […]
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Hoonjong Kang, Fahri Yaras, Levent Onural
A holographic fringe pattern generation methods is based on Fraunhofer diffraction and subsequent segmentation and approximation of the fringe pattern. Several modifications of the original algorithm are already proposed to improve the quality of reconstructions. We compare the quality of to the reconstructed images from different versions of this algorithm by taking the reconstructions from […]
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Ivo Hanak, Martin Janda, Vaclav Skala
Application of the GPU to the computer generated holography is a topic of research for some time. While the majority of authors aim on performance, we aim on visual aspects. We present a new approach that is capable to synthesise a hologram of a scene described by triangles using the GPU and it is capable […]
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Laszlo Orzo, Zoltan Gorocs, Istvan Szatmari, Szabolcs Tokes
Using Digital Holographic Microscopy (DHM) we can gather information from a whole volume and thus we can avoid the small depth of field constraint of the conventional microscopes. This way a volume inspection system can be constructed, which is capable to find, segment, collect, and later classify those objects that flow through an inspection chamber. […]
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Lukas Ahrenberg, Andrew J. Page, Bryan M. Hennelly, John B. McDonald, Thomas J. Naughton
View-reconstruction and display is an important part of many applications in digital holography such as computer vision and microscopy. Thus far, this has been an offline procedure for megapixel sized holograms. This paper introduces an implementation of real-time view-reconstruction using programmable graphics hardware. The theory of Fresnel-based view-reconstruction is introduced, after which an implementation using […]
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