Projection calibration method and system based on monocular system

The embodiment of the invention discloses a projection calibration method based on a monocular system. The monocular system comprises a camera device, a projection device and a stereoscopic target, and the surface of the stereoscopic target is provided with a plurality of encoding marking points and blank areas. The method includes steps: acquiring a first image through the camera device, performing feature recognition, and obtaining pixel coordinates corresponding to the encoding marking points; performing calibration according to the pixel coordinates and world coordinates of the encoding marking points, and obtaining a first calibration model; projecting a projection image through the projection device, wherein the projection image includes a plurality of projection marking points; acquiring a second image through the camera device, performing feature recognition, and obtaining pixel coordinates of the projection marking points; and determining world coordinates corresponding to theprojection marking point