L Zhang   T Sakurai   H Miike   
IMAGE AND VISION COMPUTING 17(3-4) 309-320 1999年3月 [査読有り]
In actual scene analysis, the influence of non-ideal conditions such as non-uniform illumination should be taken into account. The conventional methods for the estimation of motion fields are violated in this situation. In this study, two approach...
T Sakurai   E Yokoyama   H Miike   
PHYSICAL REVIEW E 56(3) R2367-R2370 1997年9月 [査読有り]
Oscillation of surface deformation synchronized with oscillation of convection was found in a thin solution layer of a Belousov-Zhabotinsky reaction in which a spiral wave train was excited. To clarify the underlying mechanism of establishing osci...
T Sakurai   H Miike   E Yokoyama   SC Muller   
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 66(3) 518-521 1997年3月 [査読有り]
Spiral patterns are representative dissipative structures that can be observed in reaction-diffusion systems such as Belousov-Zhabotinsky (BZ) reactions. We found periodic initiation of moving structures of convection from the collision line of th...
Journal of the Physical Society of Japan 66(3) 598-606 1997年
Numerical experiments on the Oregonator model of the Belousov-Zhabotinsky reaction with 2 variables (activator and inhibitor) are carried out. Influences of an inhibitory diffusion coefficient and inhibitory initial condition (concentration) on it...
Hidetoshi Miike   Tatsunari Sakurai   Atsushi Osa   Etsuro Yokoyama   
Journal of the Physical Society of Japan 66(6) 1647-1655 1997年
We propose a method to measure Brownian motion based on image sequence processing. Random motion of sub-micron sphere particles is visualized under an inverted microscope with laser light illumination. We analyze a long image sequence of the motio...