Open AccessOn-site calibration of line-structured light vision sensor in complex light environments
Author(s) -
Zhen Liu,
Xiaojing Li,
Yong Yin
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.029896
Subject(s) - ellipse , optics , structured light , calibration , intersection (aeronautics) , projection (relational algebra) , structured light 3d scanner , line (geometry) , image sensor , planar , light field , physics , ray , computer vision , plane (geometry) , artificial intelligence , computer science , mathematics , geometry , scanner , algorithm , computer graphics (images) , engineering , quantum mechanics , astronomy , aerospace engineering
A novel calibration method for the line-structured light vision sensor that only requires the image of the light stripe on the target using a movable parallel cylinder target is proposed in this paper. The corresponding equations between two ellipses obtained from the intersection of the light stripe and the target and their projected images are established according to the perspective projection transformation, and the light plane equation is solved based on the constraint conditions that the minor axis of the ellipse is equal to the diameter of the cylinder. In the physical experiment, the field of view of the line-structured light vision sensor is about 500 mm × 400 mm, and the measurement distance is about 700 mm. A calibration accuracy of 0.07 mm is achieved using the proposed method, which is comparable to that when planar targets are used.