FRONT COATED PLANE MIRROR-BASED STRUCTURED LIGHT PARAMETER CALIBRATION DEVICE AND METHOD

摘要

Disclosed is a front coated plane mirror-based structured light parameter calibration device, comprising an area array camera, a word line laser, a front coated plane mirror, a plane glass target, and a white printing paper. Also disclosed is a front coated plane mirror-based structured light parameter calibration method, comprising: place the front coated plane mirror and the plane glass target in front of the camera; the camera simultaneously photographs a plane glass target image and a mirror image thereof; establish a virtual binocular measurement model; obtain an optimization solution of a rotation matrix and a translation vector from a front coated plane mirror coordinate system to a camera coordinate system by means of a nonlinear optimization method; perform image vanishing point calculation on an alternative feature point by means of least squares; place the white printing paper in front of the front coated plane mirror; the camera simultaneously photographs an actual light bar image and a mirror light bar image; extract center points of the light bar images; and calculate a three-dimensional coordinate of a matching point to solve a light plane equation. By means of the device and the method, the light bar quality is improved and the light bar center extraction precision is raised; feature points with the position precision of the micron order are provided to obtain more calibration points; higher calibration precision is realized; and the calibration result is more stable.