Research And Implementation Of Camera Calibration And 3D Reconstruction In Optical Motion Capture System

In recent years,with the gradual maturity of the optical motion capture technology,the optical motion capture system has become more and more widely used compared with other methods of motion capture technology,and has become a major technical means of acquiring motion data.This paper mainly researches the camera calibration and 3D reconstruction technology of optical motion capture system based on marker and proposes a technique based on L-shaped frame calibration combined with wand optimization to determine the camera internal and external parameters and reconstruct the 3D coordinates of the marker point.The achievement effect has carried on the appraisal.The main work is as follows:1.Describes how to calculate the coordinates of the four points in the camera coordinate system by using the geometric relationship of the four points on the L-shaped frame,and then introduces the theory of using the conversion between different coordinate systems to obtain the coordinates of the camera in the world Department of the displacement parameters and rotation parameters.2.Introduce the use of wand data,the use of LM algorithm on the camera's internal and external parameters of the overall bundle optimization.3.Described the use of optical motion capture system for 3D reconstruction technology.This paper mainly introduces the reconstruction of 3D coordinates of the marker point by the polar geometry theory.4.An overview of the optical motion capture system test process,using the method described in this article on the calibration of the camera during the test,obtained after the optimization of the camera internal and external parameters.In addition,based on the calibrated result of each camera,this paper also carried out a3 D reconstruction test.Based on the selected set of reference points,the points in the other cameras that match with the reference points are finally obtained.In addition,four problems which are prone to matching are summarized in the process of matching,and the complementarity between 3D reconstruction and bipolar line and line residual is proposed..