Development of Domain-Specific Processors for Holography

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K21294
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 1001:Information science, computer engineering, and related fields
• Research Institution: Tokyo University of Science
• Principal Investigator: Yamamoto Yota 東京理科大学, 工学部情報工学科, 助教 (50906740)
• Project Period (FY): 2021-08-30 – 2023-03-31
• Keywords: 3次元映像 / 高性能計算 / ホログラフィ / FPGA / ハイパフォーマンスコンピューティング

Outline of Final Research Achievements

Electroholography is called the ultimate method of reproducing three-dimensional information. However, the computational complexity of computer-generated holograms (CGH) makes them difficult to process in real-time, and their practical application is not yet in sight. Among the electroholography calculation methods, phase-based CGH calculation is complicated. However, it is expected to be put to practical use because of its ability to produce high-quality reproduced images. In this study, we developed a dedicated processor using an FPGA to accelerate electroholography calculations. By developing a new special-purpose computer that calculates phase-type CGH from amplitude-type CGH with a relatively low computational load, the computation time for phase-type CGH was reduced by half, and real-time 3D image reproduction was successfully achieved.

Free Research Field

高性能計算

Academic Significance and Societal Importance of the Research Achievements

3次元映像技術への注目が高まっているが，現在市販されている映像提示装置は，人間が奥行きを知覚するために必要な奥行き情報を完全には再現できていない．そのため，長時間の使用には適さず，3D酔いと呼ばれる吐き気や眠気を感じるなど応用への大きな障壁となっている．
電子ホログラフィは理想的な3次元映像提示手法と呼ばれている．しかし，必要とされる計算量が実用化を困難にしている．本研究では，より実用化が困難とされてきた位相型電子ホログラフィ計算の高速化に成功した．より良質な再生像が得られる位相型での電子ホログラフィ実用化への新たな指針を示すことができた．