Projection method and non-transitory computer-readable storage medium storing program

Abstract

A projection method includes: displaying, by controlling a projection apparatus, a projection image having four corners inside a display area having four corners, the display area being an area on a projection surface; acquiring a first captured image that is a captured image of a range including the display area where the projection image is displayed; detecting, by performing image processing on the first captured image, a plurality of first feature points corresponding one-to-one to each of four corners of a first image indicating the display area in the first captured image; displaying, by controlling the projection apparatus, a pointer image for adjusting a shape of the projection image, the pointer image being located at a corner of the projection image; performing a first correction of correcting the shape of the projection image by changing a position of the corner of the projection image based on a user operation for moving the pointer image; and performing, based on the plurality of first feature points, a second correction for maintaining a positional relationship between the four corners of the display area and the four corners of the projection image determined by the first correction.