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A 3D Scanning System Based on Monocular Vision Geometry Construction

  

  1. 1.College of Information Engineering, Northwest A&F University, Yangling 712100, China;

     2.Yuncheng Comprehensive Agricultural Development Office of Shanxi, Yuncheng 044000, China
  • Received:2014-03-20 Online:2014-06-13 Published:2014-06-25

Abstract:

In order to construct a convenient and fast 3D scanner based on monocular vision, a high-precision monocular visual geometric projection  of scene modeling
method is proposed and a high-precision 3D scanning system is developed. Firstly, we obtain the coordinates of calibration points by image processing, and convert them into 3D
camera coordinate system by the projective transformation, and then construct the plane equation of Mesa and Base. Secondly, we calculate translation vectors through moving Mesa
to obtain the translation vector, and get the laser plain equation by the camera center and the laser line which fell on the Mesa and Base. Finally, we extract the line center
of laser light strip, and obtain the 3D point cloud data of object surface after projection transformation and translation transform. Experiment results indicate that through
the geometry projection transformation method to construct the plane equation error is less than 0.2%, and the error of 3D scan results is less than 0.05 mm.

Key words: laser optics, 3D scanning, monocular vision, geometry construction