Study Of 3D Measurement System With Structured Light And Binocular Vision Technology

In recent years,the optical three-dimensional measurement with the advantages of non-contact,fast,high precision,easy information processing,have been widely used in the fields of industrial automation,computer aided design and manufacturing(CAD/CAM),reverse engineering(RE),rapid prototyping(RP),virtual reality(VR),augment reality(AR)and so on.The paper designed a 3D measurement system with structure light technology and binocular stereo vision.So we studied the calibration methods of the camera and the projector,the encoding methods of the structured light and the methods of the 3D reconstruction.Firstly,the paper build established the mathematical model of the camera and the projector,and analyzed the calibration principle of the camera and the projector.Then we compared the commonly used encoding methods of the structured light,and determined the encoding strategy.Finally,we studied the methods of the 3D reconstruction,built the 3D measurement system,and carried out A series of three-dimensional measurement experiments.In the paper,a new calibration method for the projector based on the direct encoding and the Gray encoding has been proposed.Compared with the traditional methods,the new will not introduce the camera calibration error,improved the accuracy of the calibration and the system.An optimization algorithm based on the linear interpolation has been proposed to solve the low pixel matching accuracy witch is resulted from the higher resolution of the camera than that of the projector.