Abstract:To achieve highprecision calibration of line structured light, a new line structure cursor calibration algorithm based on twodimensional planar target is proposed. First of all, the light bar straight line equation in the image coordinate systemis fitted. The light bar straight line equationin the imageof thecamera coordinatesystem issolvedby transformingrelationshipbetween theimage coordinatesystemandthecameracoordinate system.Theplaneequationdeterminedbytheoriginofthecameracoordinatesystem andthe straight line is solved. Then, the plane equation of the twodimensional target plane is determined. The intersection of two planes is the equation of the light bar straight line on the calibration plate of the camera coordinate system. Each calibration plate image is processedEach calibration board image is processed as above. The laser plane equation is fitted by the finally extracted multiple groups of light bar centerlines. In the general environment, experimental results show that this algorithm can make up for the shortcomings of the existing algorithms with fewer calibration points. It has advantages of high accuracy and easy operation. The maximum difference is 0006 mm.