Research on bridge displacement monitoring under dark light based on corner calibration
The digital image method based on machine vision to monitor the deformation of structures has many advantages such as non-contact,but its application is limited by factors such as dark light environment and artificial marker deformation.Based on the existing template matching measurement,a bridge deforma-tion monitoring method and system based on Harris corner point detection calibration and Retinex dark light enhancement network in dark light environment is proposed to improve the displacement monitoring accura-cy of bridge structures in complex environments.Further,through experimental validation,the results show that the maximum absolute error of bridge displacement monitoring under dark light environment at 10m distance is less than 0.3mm,and the mean accuracy after calibration based on angle point is improved by 44％compared to uncalibrated at the target deflection angle of 0.6 to 1.2 degrees,which indicates that the system has the practicality of engineering structure displacement monitoring under dark light environment.
万方数据
维普
