Surface subsidence monitoring method based on camera and laser fusion
The image contains rich scene environment information. The laser has excellent ranging accuracy and reliability, which can be used to supplement the depth information of the scene in two-dimensional image. A monitoring method of camera and laser fusion is proposed by the complementarity of image information and laser in this paper. Based on the target plane equation and the deflection angle of the camera field of view, the conversion method from the two-dimensional pixel coordinates of the target object to the three-dimensional space coordinates is established. The automatic monitoring of target surface subsidence is realized in the health monitoring task of infrastructure structure. The proposed automatic surface subsidence monitoring method is verified by experiments. The average relative error of the experimental results is 4. 6%, and stable monitoring results can be obtained at different monitoring distances.