Water level identification method and system fused with camera calibration

The invention discloses a water level identification method and system fused with camera calibration, relates to a data processing technology, and solves the problems of low water level identification precision and low anti-interference capability in a complex environment in an existing method. The method comprises the following steps: realizing conversion from a pixel coordinate system to a world coordinate system by establishing high-precision mapping from a 2D pixel plane coordinate to a 3D space coordinate, then identifying a water area boundary in a video image at a pixel level, marking pixel coordinates and elevations of pixel points with known reference elevations, and finally, identifying the water area boundary in the video image at the pixel level. Then determining the pixel coordinates of the water surface line according to a straight line where the water area boundary and the X axis of the world coordinate system are located, and finally calculating according to the 3D space coordinates correspond