Image correction based on homography in stereoscopic projection display

Stereoscopic and autostereoscopic projection-display systems use projector arrays to present stereoscopic images, and each projector casts one parallax image of a stereoscopic scene. Because of the position shift of the projectors, the parallax images have geometric deformation, which influences the quality of the displayed stereoscopic images. In order to solve this problem, a method based on homography is proposed. The parallax images are pre-transformed before they are projected, and then the stereoscopic images without geometric distortion can be obtained. An autostereoscopic projection-display system is developed to present the images with and without calibration. Experimental results show that this method works effectively.