Optimal parameters selection for 3D-mechanical surface measuring equipment based on the structured light Gray code ☆

3D reconstruction techniques of object by using the structured light are widely used in the industry and academia. This method gives some advantages like fast and accurate. The measurement precision of a certain system depends on the geometrical parameters of the system, the characteristics of the surface under test and the specification of devices. In this paper, the effect of some parameters on the resolution of the 3D surface measurement equipment based on Gray code technique, especially the position correlation between the camera and the projector is investigated. Thereby, the paper proposes the selection of optimum parameters for the measurement system. Experimental results determine the optimum conditions for the system at the measuring range (w x h = 400 mm x 300 mm) to obtain the best z-resolution of 0.67 mm.