Calibration method of a three-dimensional scanner based on a line laser projector and a camera with 1-axis rotating mechanism

Abstract

This study introduces a scanning system that utilizes a motor platform to mount a line laser and a camera. Two crucial parameters are considered to extract threedimensional information from a single frame: a rotation axis and a specific point along this axis. A calibration approach for rotation axis identification is presented to determine these parameters. The rotation axis corresponds to the normal vector of the camera's movement plane and defines the rotation matrix during the scanning process. The identified point on the rotation axis serves as the translation matrix's center and represents the focal point of the camera's trajectory. A comprehensive point cloud is generated by assembling multiple frames using the scanner's rotation angle. Experimental findings substantiate the method's efficacy in enhancing the system's scanning for plane reconstruction and accuracy, and the scanning quality is much better than that of the previous approach.