A New Algorithm for Automatic Tracing of Particles

Abstract

The aim of this research is to develop new techniques for tracking particles in fluid. They consist of three elements, as follows. In the first part, a method to make microcapsules which are filled with pure water and covered with thin film of polystyrene was developed. Their mean specific gravity and mean diameter were 1.0046 and 673μm, respectively. In the second part, a new method was proposed to objectively determine the threshold of brightness, which separates particel-images from background. Finally, a new algorithm is now under development for tracking particles. It is composed of Kalman's filtering theory to predict location and brightness of each particle in the next frame and χ²-test to evaluate the probability that a pair of particle-images in the successive frames are the same one.