Abstract: An image projection apparatus is provided. The image projection apparatus includes a camera which acts as an image pickup device. The camera detects the position of curved surface which serves as a target for displaying projected image. Thus, an image can be projected by the projection apparatus to a surface other than a fixed planar surface. Markers are placed on the curved surface, and a marker follower follows the markers based on an image pickup signal from the camera. An attitude and/or position prediction unit is provided for predicting the attitude and/or position of the curved surface. A computer is provided having an image creating unit for creating an image based on the attitude and/or position of the curved surface. Finally, a projector is provided for projecting an image from the computer to the curved surface as a target of the projection.