Robot automatic calibration method and system

The invention relates to the technical field of automation, in particular to a robot automatic calibration method and system. The method comprises the following steps: acquiring a rim contour image of a vehicle; calculating the coordinates of the rim center in the rim contour image based on a least square ellipse fitting algorithm; comparing the rim contour image with a preset image and comparing the coordinates of the rim center with preset coordinates, and judging whether the size and the coordinates of the rim are within a preset threshold value or not; if not, the deviation position and the deviation amount of the vehicle are determined according to the comparison result of the rim contour image and the preset image and the comparison result of the coordinates of the rim center and the preset coordinates; and adjusting the vehicle according to the offset position and the offset. The position of the vehicle on the assembly line can be automatically adjusted. 本申请涉及自动化技术领域，尤其是涉及一种机器人自动校准方法和系统。该方法包括，获取车辆的轮辋轮廓