Ryuji Hirayama
University of Sussex
6 Papers
36 Citations
Ryuji Hirayama is an academic researcher from University of Sussex. The author has contributed to research in topics: Volumetric display & Computer science. The author has an hindex of 4, co-authored 6 publications. Previous affiliations of Ryuji Hirayama include Tokyo University of Science.
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Papers
A volumetric display for visual, tactile and audio presentation using acoustic trapping.
TL;DR: The multimodal acoustic trap display (MATD) is presented: a levitating volumetric display that can simultaneously deliver visual, auditory and tactile content, using acoustophoresis as the single operating principle.
GS-PAT: high-speed multi-point sound-fields for phased arrays of transducers
TL;DR: GS-PAT is presented, a GPU multi-point phase retrieval algorithm, capable of computing 17K solutions per second for up to 32 simultaneous points in a mid-end consumer grade GPU, and compared to state of the art multi- point algorithms used for ultrasound haptics and levitation, showing similar quality of the generated sound-fields, and much higher computation rates.
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Special-purpose computer HORN-8 for phase-type electro-holography.
Takashi Nishitsuji,Yota Yamamoto,Takashige Sugie,Takanori Akamatsu,Ryuji Hirayama,Hirotaka Nakayama,Takashi Kakue,Tomoyoshi Shimobaba,Tomoyoshi Ito +8 more
TL;DR: The development of new version of HORN-8 and its cluster system, which achieved a real-time reconstruction of a 3D movie with point clouds comprised of 32,000 points for phase-type electro-holography, was reported.
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Projection of multiple directional images on a volume structure with refractive surfaces.
Ryuji Hirayama,Hirotaka Nakayama,Atsushi Shiraki,Takashi Kakue,Tomoyoshi Shimobaba,Tomoyoshi Ito +5 more
TL;DR: A new refraction-based approach to embed multiple images into a single volume structure rendered on a glass solid (3D crystal) that can compensate for refractive effects at glass surfaces regardless of the viewing directions and enable the viewing Directions to be set more flexibly, even allowing for 180 ∘ opposite projection by leveraging refraction.
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Special-purpose computer for electroholography in embedded systems
Yota Yamamoto,Nobuyuki Masuda,Ryuji Hirayama,Hirotaka Nakayama,Takashi Kakue,Tomoyoshi Shimobaba,Tomoyoshi Ito +6 more
- 15 Apr 2019
TL;DR: This study developed a compact holographic computer using a Xilinx Zynq UltraScale+ MPSoC with an ARM CPU and an FPGA on a single chip and can reproduce a 3D video at 15 frames per second for a spatial light modulator.
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