Projection picture correction method and system, projection equipment and storage medium

The invention relates to the technical field of projection image processing, discloses a projection image correction method and system, projection equipment and a storage medium, and is used for solving the problem that the projection image quality is reduced due to automatic keystone correction. The plane equation of the projection plane in the projection equipment coordinate system is obtained through the projection graphic card, then the deflection angle between the projection equipment and the projection plane can be obtained, and then the projection equipment is adjusted to rotate based on the deflection angle. Therefore, the projection equipment is fully automatically adjusted to a proper angle, so that the projection equipment is perpendicular to the projection surface, and the projected picture naturally becomes a rectangle. In addition, the distance between the projection equipment and the projection surface can be adjusted, so that the picture can be prevented from being projected to the outside of