Patent ID: 8439504
Filing Date: 2013-05-14
Classification: G03B,H04N

Abstract:
1. A control method for a multiprojector system, wherein the multiprojector system comprises multiple projectors arranged in a projector array, the method comprising: capturing an image including a respective individual projection area projected by each of the projectors in the projector array; determining whether the projector array is positioned to form one single display screen object or is positioned to form two or more separated display screen objects; dividing an image to be projected by the multiprojector system into sub-images based on the captured images of individual projection areas projected by each of the projectors in the projector array and based on an aspect ratio of the image to be projected by the multiprojector system in a case where it is determined that the projector array is positioned to form two or more separated display screen objects; selecting one of at least first and second keystone correction modes, wherein the first keystone correction mode is selected in response to a determination that the projector array is positioned to form one display screen object, and the second keystone correction mode is selected in response to a determination that the projector array is positioned to form two or more separated display screen objects and wherein the divided images are corrected to be displayed separately on each of the two or more separated display screen objects in the second keystone correction mode; wherein in the first keystone correction mode, a homography transformation for each of the projectors is derived so as to accommodate keystone correction of all projectors in the projector array involved in the projection of the single display screen object; and wherein in the second keystone correction mode, a homography transformation for each of the projectors is derived so as to accommodate keystone correction of all projectors involved in the projection of each separated display screen object; and applying inverses of the derived homography transformations.