Prof. Satoshi Tanaka, College of Information Science and Engineering, Ritsumeikan University, Japan
Topic: Heritage Visualization based on Large-Scale Laser-Scanned Point Clouds
The recent rapid development of laser scanners has enabled the precise measurement of real cultural heritage objects. In such measurements, we acquire a large-scale point cloud that often consists of billions of 3D points. The characteristic feature of the laser-scanned point clouds acquired from cultural heritage objects is the complexity of the recorded 3D shapes as well as their large size. Therefore, we need precise and high-quality 3D transparent visualization to study the laser-scanned cultural heritage objects. To our knowledge, however, no previous study has reported the transparent visualization of a large-scale laser-scanned point cloud consisting of billions of 3D points at interactive speed and with the correct depth feel. To improve this situation, we propose a novel visualization method for precise and interactive-speed 3D transparent imaging of the large-scale and complex laser-scanned point clouds. Our method is based on a stochastic algorithm and directly uses the laser-scanned 3D points as rendering primitives. We demonstrate the effectiveness of our method by applying it to festival floats of high cultural value in the Gion Festival and other Japanese 3D cultural heritages. We also report our preliminary results of applying our method to Indonesian 3D cultural heritages.
Prof. Satoshi Tanaka got his PhD in theoretical physics at Waseda University, Japan, in 1987. After experiencing assistant professor, senior lecturer, and associate professor at Waseda University and Fukui University, he became the professor of Ritsumeikan University, Japan, in 2002. His current research target is computer visualization of complex 3D shapes such as laser-scanned 3D cultural heritage objects, internal organs of the human body, and large-scale fluid simulation results. He is the best paper winners at Asia Simulation Conference 2012, Journal of Advanced Simulation in Science and Engineering in 2014, etc. He was the President of JSST (Japan Society for Simulation Technology) and also the President of ASIASIM (the Federation of Asia Simulation Societies). At present, he is the vice-President of the Visualization Society of Japan and a member of Eurographics and ACM. He is also working as a cooperation member of Science Council of Japan.