Model and error analysis for coded structured light measurement system

摘要

Coded structured light can rapidly acquire the shape of unknownnsurfaces by projecting suitable patterns onto a measuring surfacenand grabbing distorted patterns with a camera. By analyzing the deformationnpatterns appearing in the images, depth information of the surfacencan be calculated. This paper presents a new concise and efficient mathematicalnmodel for coded structured light measurement system to obtainndepth information. The interrelations among model parameters and errorsnof depth information are investigated. Based on the system geometricnstructure, the results of system parameters affecting object imagingncan be obtained. Also, the dynamic deformation patterns can be capturednunder different measurement conditions. By analyzing the system parametersnand depth information errors, the system constraint conditions cannbe determined, and the system model simulation and error analysis arendiscussed in experiments, too. Also, the system model based on optimalnparameters is utilized to implement reconstruction for two objects.