Research on 3D Measurement System Based on Binocular Line Structured Light
Aiming at the limitations of traditional binocular stereo vision measurement method and laser tri-angulation method in the process of three-dimensional reconstruction of objects,a set of binocular line laser scanning three-dimensional reconstruction system is designed. Firstly,the structural composition and mathe-matical model of the binocular line laser scanning measurement system are analyzed,and the calculation method of the three-dimensional point coordinates of the laser center line under the binocular epipolar con-straint is derived. Aiming at the problem that the traditional algorithm is not ideal for extracting the center line in the area where the curvature of the light stripe changes greatly,a line structured light center line ex-traction algorithm based on the improved gray center of gravity method is proposed. Finally,the centerline extraction accuracy and efficiency comparison experiment,and the three-dimensional reconstruction accura-cy experiment are carried out. The experimental results show that the improved algorithm can accurately and effectively extract the center line of the area where the curvature of the light stripe changes greatly. The average extraction accuracy reaches 1.462 pixels,and the average extraction speed is 0.0734 s. At the same time,the designed structure can accurately obtain the rich 3D point cloud data of the object surface,and the measurement error is within 1 mm.
line laserstereoscopic visionthree-dimensional measurementimproved gray gravity method
万方数据
维普
