Research on ranging algorithm based on the fringe projection

Abstract

Aiming at the problem of the existing positioning and ranging methods depended on the external conditions such as the number of sensors, artificial markers, and the ground, this paper proposes a positioning method based on fringe projection. Firstly, the fringe image of the reference surface and the fringe image of the background are captured, respectively, and the centerlines of the fringes are extracted by using the ZS (Zhang-Suen) thinning algorithm. Secondly, the width of the fringe at any point on the reference surface is determined according to the principle of minimum Euclidean distance. Then, the projection model is established, and the distance between the reference surface and the projector is determined. Finally, the three-dimensional reconstruction technique is used to obtain the three-dimensional topography of the measured object, and the distance between the measured object and the projector is calculated. The experimental results show that the ranging algorithm based on fringe projection is feasible, and the mean square error of the ranging result is 0.0434 m.