masterhead masterhead  masterhead

Real-time Particle Measurement/Fluid Measurement


Objects of particle measurement include tablets, food granules, metallic particles, fluorescent particles, biologic cells, and so on. In this measurement, we need to observe numerous particles at a time and obtain information of each one such as size, position, moving velocity and shape. This can be used in still-image-based inspection and video-based fluid analysis. However, the conventional ones are mainly based on off-line operation or light scattering data analysis.

Introduction of high-frame-rate image processing is expected to lead the expansion in the range of its applications. For example, it enables to give advantages such as real-time operation, detail observation of moving particles, increase of number of particles, and high flexibility by pattern analysis. Here, we show two examples using a high-speed vision for numerous-point analysis.

Fig. 1 shows the trajectories of particles in a flowing fluid measured at 955 fps. Fig. 2 and 3 show the results of pattern classification of moving particles with different sizes.

Fig.1 Real-time Fluid Measurement

Fig.2 Size Classification of Moving Particles

Fig.3 Collision Analysis of Moving Particles

Movies -Fluid Measurement-


  1. Yoshihiro Watanabe, Takashi Komuro, and Masatoshi Ishikawa: A High-speed Vision System for Moment-based Analysis of Numerous Objects, 2007 IEEE International Conference on Image Processing(ICIP'07) (San Antonio, 2007.9.19) /Proceedings, pp. V177-V180. [PDF] *IEEE
*IEEE © 2001-2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Ishikawa Group Laboratory, Data Science Research Division, Information Technology Center, University of Tokyo / Tokyo University of Science
Ishikawa Group Laboratory WWW admin: contact
Copyright © 2008 Ishikawa Group Laboratory. All rights reserved.