Strain gauge three-dimensional coordinate acquisition method and system based on single camera

The invention provides a strain gauge three-dimensional coordinate acquisition method and system based on a single camera, and the method comprises the steps: carrying out the shooting of a single camera from different angles based on a single-camera multi-view measurement principle, and obtaining an image sequence of a strain gauge on the surface of an object; coding points of adjacent images are identified and matched, and a non-linear optimization means is adopted to carry out joint optimization on space coordinates and camera postures; during camera attitude estimation, image coordinates of a strain gauge are identified and extracted from a shot image sequence by adopting a deep learning algorithm, and then coordinate matching is carried out by using limit constraint; and finally, according to the estimated camera attitude and the matched image coordinates of the strain gauge, calculating by using a classical triangulation method to obtain the three-dimensional coordinates of the strain gauge. According t