Staff

Name:　Takashi Michikawa
Position:　Associate Professor
Degree:　Ph.D. (Engineering)
Laboratory:　Environmental Design and Information Technology Laboratory
Laboratory URL: http://www.see.eng.osaka-u.ac.jp/seeit/seeit/

Geometric Modeling Using Scanned Data

My research interests lie in the field of geometric modeling, which focuses on handling shapes on computers. My research has focused on constructing geometric models from images and point cloud data acquired using laser scanners, CT scanners, and various types of microscopes. The targets range across various scales, including cellular and material microstructures, mechanical parts, humans, and civil infrastructure. The reconstructed models can be used for quantitative analysis, such as comparison with CAD models and evaluation of the distribution of internal defects.

Digitization of Inspection Skills

The aging of infrastructure facilities, such as roads, tunnels, and bridges, has become a serious issue in Japan, and the shortage of skilled inspection engineers is a critical problem. Our research has developed a system that maps hammering positions and associated sounds onto a single image from inspection video footage. AI-based analysis of the digitized data reveals differences related to years of inspection experience. These results suggest that the system can be used for training novice engineers and for analyzing the tacit knowledge behind expert inspection skills.

Publication

1. Takashi Michikawa and Hiromasa Suzuki, Polygonization of volumetric skeletons with junctions, Computer Aided Design, Vol. 45(4), pp. 822-828, 2013.
2. Takashi Michikawa et al., Automatic extraction of endocranial surfaces from CT images of crania, PLOS ONE, Vol.12(4), e0168516, 2017.
3. Nao Hidaka, Takashi Michikawa, Ali Motamedi, Nobuyoshi Yabuki and Tomohiro Fukuda, Polygonization of point clouds of repetitive components in civil infrastructure based on geometric similarities, Automation in Construction, Vol. 86, pp. 99-117 2018.
4. Rinya Inaba, Shinichi Fukushige, Takashi Michikawa and Takafumi Sassa, An Analysis of Hammering Inspection Skills for Road Tunnel Maintenance, EcoDesign Accelerating Social Transformation (Springer E-book), in press.