Bridge deformation monitoring method and system based on visual identification

• Main Authors: GUO ZHENGCHAO, RAN XINGWEN, SI QIANCHENG, JIANG YU, WAN ZHIQUAN, BIAN YIMING, HU KE, YAN LEI, NAOTAKE, ZHANG XIN
• Format: Patent
• Language: Chinese; English
• Published: 12.07.2024
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The invention discloses a bridge deformation monitoring method and system based on visual recognition, and relates to the technical field of machine visual recognition, and the method comprises the following steps: setting a plurality of mark points for a monitored bridge, and measuring and collecting the actual horizontal distance between the mark points; the method comprises the following steps: calibrating a camera, determining parameters of the camera, acquiring a bridge image, performing distortion correction on the acquired image, extracting a target area of the acquired image, performing image feature extraction and matching on the extracted target area, obtaining position coordinates of mark points corresponding to bridge deformation at different moments, calculating pixel coordinates of the mark points, and calculating a longitudinal coordinate difference. Restoring the actual distance of the pixel coordinate difference value in the world coordinate system; and comparing with a preset offset threshol