Research On Binocular 3D Reconstruction System Based On Structured Light

With the development of society,people’s demand for 3D measurement technology is also increasing.Among which the structured light 3D measurement technology is widely used in various industries due to its advantages of non-contact,simple structure,high measurement efficiency and high measurement accuracy,which is receiving more and more attention from enterprises and researchers,and is widely used in the fields of machine vision,medical inspection,industrial production,cultural relics and archaeology.This thesis mainly focuses on the theoretical and experimental research of the structured light-based binocular 3D reconstruction system and develops a binocular structured light 3D measurement system.The main research work is as follows:(1)Designed a suitable system device according to the inspection requirements and the selected system model,and completed the selection of camera,lens and projector.Developed and designed an intelligent cabinet for binocular structured light 3D measurement,so that it has the functions of storage,movable,displayable,and one-line connection.(2)Monocular camera calibration experiments were conducted using a checkerboard calibration board and a ChArUco calibration board respectively.The advantages and disadvantages of the two were compared and analyzed,the experiment proves that the calibration experiment results using the ChArUco calibration board are better than the checkerboard calibration board.Therefore,the binocular calibration algorithm was developed using the ChArUco ceramic calibration board and integrated into the binocular calibration software.(3)Select the appropriate fringe frequency,and use the four-step phase shift method combined with the heterodyne principle to solve the unique phase value.Then based on the phase value,the binocular matching is carried out,and it is improved and optimized,so that the matching speed and accuracy are improved,and the feasibility of the matching algorithm is also verified by experiments.(4)Modular development and design of the supporting software for this system,including image generation software,projector operation software,binocular calibration software,and 3D imaging software.The measurement performance of the system was also tested with ceramic standard measuring blocks and plaster models,and a brief analysis of its measurement errors was conducted.The test results prove that the system can meet the general measurement requirements and is easy to use with a reconstruction time of only 4～5 seconds.