Top > Members > Masaaki MOCHIMARU


member_img Masaaki MOCHIMARU


Human Informatics Research Institute (HIRI)
National Institute of Advanced Industrial Science and Technology (AIST)

FAX: ;81-3-5500-5233


March, 1993   Graduated of Biomedical Engineering Course, Keio University
March, 1993 Doctor of Engineering
April, 1993 Employed by NIBH
April, 2001 Digital Human Laboratory, AIST
April, 2003 Digital Human Research Center, AIST
April, 2010 Director, Digital Human Research Center, AIST
November, 2010 Director, Center for Service Research, AIST
April, 2015 Director, Human Informatics Research Institute, AIST

Research Topics

Marker-less measurement of human motion

Measuring human motion, a method using markers put on the body surface have been used generally for biomechanics, ergonomics and computer graphics. We developed a new measurement method without markers. In the present method, a human geometric model is fitted into the human video image and joint angles and locations are taken from the fitted model posture. Two dimensional gait motion and standing-up motion could be measured without markers. It takes about 20 sec per frame by a personal computer.

  1. Mochimaru, M.,Yamazaki, N.: The three-dimensional measurement of unconstrained motion using a model-matching method, Ergonomics, 37(3), 493-510 (1994).

Shape similarity of body forms using Free Form Deformation

The Free Form Deformation technique; the control lattice points are defined around the object form and the form is deformed by moving the control points. We use the technique for shape similarity of human body forms. The moving vectors of the FFD control points are calculated to deform the original form into the target form. The vectors represent a distortion pattern of the original form and the target form and shape similarity of them are characterized from the vectors. Using this technique, we can evaluate the shape similarity of human body forms and utilize a clustering of foot forms, trunk forms and so on. It is a basic technique for determination shoe sizes and cloths sizes.

  1. Mochimaru, M.,Kouchi, M.: Automatic calculation of the medial axis of foot outline and its flexion angles, Ergonomics, 40(4), 450-464 (1997).
  2. Mochimaru, M.,Dohi, M.,Kouchi, M.: Analysis of 3D human foot forms using the FFD method and its application in grading shoe last, Ergonomics, 43(9), 1301-1313 (2000).
  3. Kouchi, M. and Mochimaru, M. : Development of a low cost foot-scanner for a custom shoe making system, 5th ISB Footwear Biomechanics (Zurich, Switzerland), 58-59, (2001). **Basic Research Award

Computer aided surgery for endoscopic paranasal sinus surgery

  1. Yamashita, J.,Yamauchi, Y.,Mochimaru, M.,Fukui, Y.,Yokoyama, K.: Real-Time 3-D Model-Based Navigation System for Endoscopic Paranasal Sinus Surgery, IEEE Transactions on Biomecical Engineering, 46(1), 107-116 (1999).