Projection-based two-dimensional code positioning method, system, equipment and medium

The invention relates to a projection-based two-dimensional code positioning method, system and device and a medium, and the method comprises the steps: obtaining a first two-dimensional code image on a projection surface shot by a camera, internal parameters of the camera and first position data of a projection device, determining a target two-dimensional code in the first two-dimensional code image, the non-qualitative two-dimensional code is projected to the projection surface through the projection device, second position data of the target two-dimensional code on the light-transmitting plate are determined, and third position data of the target two-dimensional code on the projection surface are determined according to the second position data and the first position data; and determining the position offset of the camera and the target two-dimensional code according to the internal parameters of the camera and the fourth position data of the target two-dimensional code on the first two-dimensional code im