A new effective method of calculating fluid motion vector

This paper presents an efficient method of calculating fluid motion vector. The method tries to get accurate two-dimensional fluid motion vectors through two inputting frames using image analysis methods and the continuity equation to constraint, the obtained motion vectors can reflect the characteristics of the fluid motion. The method consists four steps of initialization of motion vectors, noise reduction, smoothing and optimization. Firstly, it statistics the histogram of each region and initializes the motion vector with main components of histogram matching techniques. Then, it uses multi-resolution sampling method to remove noise from the preliminary results. In order to get accurate results while keeping appearance consistency and movement continuity, it adopts further optimization method constrained by continuity equation of fluid motion. Experimental results demonstrate effectiveness of the method. It can be applied to the motion vectors calculating in the case of multiple motions.