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Real-time animation display based on optical illusion by overlaid luminance changes


The state-of-the-art rendering methods, including path tracing, provide photorealistic images; however, the render time can be too long to be used in real-time applications such as video games and virtual and augmented reality. On the other hand, naive rendering methods such as rasterization can provide high-speed rendering instead of high-quality depiction. This paper exploits insights about human visual characteristics to combine a high-quality rendering method and a high-speed rendering method and achieve photorealistic and real-time animation. To exploit an optical illusion that virtually produces slight motion and deformation by luminance changes, we focus on an animation including small geometrical changes and propose a real-time rendering pipeline to add motion information to a photorealistic scene. We evaluated the render time and animation quality by subjective experiments. As a result, the proposed method achieved up to about 570 times faster rendering than conventional path tracing, and parameters to present the illusion and preserve the animation quality have been revealed.

Fig. 1 Elastic body animation by an optical illusion
Fig. 2 Photorealistic CG, luminance change, and overlaid images


  1. Leo Miyashita, Kentaro Fukamizu, Yuki Kubota, Tomohiko Hayakawa, Masatoshi Ishikawa: Real-time animation display based on optical illusion by overlaid luminance changes, SPIE Optical Architectures for Displays and Sensing in Augmented, Virtual, and Mixed Reality (AR, VR, MR) IV, Oral, paper 12449-8, San Francisco, California, USA, 30 Jan.-1 Feb. (2023)
Ishikawa Group Laboratory, Department of Information Physics and Computing, Department of Creative Informatics,
Graduate School of Information Science and Technology, University of Tokyo
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