期刊
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
卷 28, 期 5, 页码 2125-2134出版社
IEEE COMPUTER SOC
DOI: 10.1109/TVCG.2022.3150488
关键词
Rendering (computer graphics); Low latency communication; Shape; Image color analysis; Geometry; Surface structures; Real-time systems; Projection mapping; Multi-projector; Parallel computing methodologies
The study proposes a multi-projector projection mapping technology for dynamic scenes, which reduces latency through pixel-parallel calculation and allows for high scalability in a distributed system configuration.
Projection mapping using multiple projectors is promising for spatial augmented reality; however, it is difficult to apply it to dynamic scenes. This is because the conventional method decides all pixel intensities of multiple images simultaneously based on the global optimization method, and it is hard to reduce the latency from motion to projection. To mitigate this, we propose a novel method of controlling the intensity based on a pixel-parallel calculation for each projector in real-time with low latency. This parallel calculation leverages the insight that the projected pixels from different projectors in overlapping areas can be approximated independently if the pixel is sufficiently small relative to the surface structure. Additionally, our pixel-parallel calculation method allows a distributed system configuration, such that the number of projectors can be increased to form a network for high scalability. We demonstrate a seamless mapping into dynamic scenes at 360 fps with a 9.5-ms latency using ten cameras and four projectors.
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