POSITION ADJUSTMENT METHOD FOR PROJECTION IMAGES

A position adjustment method for adjusting positions of two projection images projected from multiple projectors contained in a multi-projection display onto a projection surface such that the images overlap. A first step involves setting pixel values of colors such that a predetermined characteristic is exhibited in an overlapping area when the adjustment images are projected. A second step involves producing adjustment image data corresponding to the adjustment images. Colors of the adjustment images are allocated to patterns such that the patterns overlap when the adjustment images are projected. A third step involves giving the adjustment image data to the multiple projectors and calculating evaluation values associated with the image data that is obtained by taking an image of the projection surface on which the adjustment images are projected from the multiple projectors. A forth step involves performing position adjustment for the projection images based on the evaluation values.