CALIBRATION METHOD OF ELEMENTAL IMAGE FOR ELIMINATION OF KEYSTONE EFFECT IN REFLECTIVE INTEGRAL IMAGING SYSTEM BASED ON MULTIPLE PROJECTORS

摘要

The present invention relates to a method for calibrating an element image to eliminate a keystone effect in a reflective integral image system based on multiple projectors. The method for calibrating an element image to eliminate a keystone effect in a reflective integral image system based on multiple projectors acquires an element image calibrated for multiple projectors through: step S1 of setting internal parameters of projectors; step S2 of calculating a geometrical location of a ray emitted from a reference projector pixel; step S3 of calculating geometrical locations of rays emitted from pixels of multiple projectors; step S4 of calculating a reference projector ray closest to a ray emitted from a specific pixel of the multiple projectors; step S5 of checking the two rays for mapping thereof to determine whether the two rays correspond to an identical element lens; step S6 of assigning a calculated reference pixel value to the specific pixel of the multiple projectors; and step S7 of acquiring a calibration element image for the multiple projectors. Accordingly, the method for calibrating an element image to eliminate a keystone effect in a reflective integral image system based on multiple projectors according to the present invention can eliminate a keystone effect, which is a problem of a conventional MPII system. Furthermore, there are significant effects in which a projection screen surface wider than that of the conventional MPII system can be used and in which a normal high-resolution 3D image can be acquired regardless of location of the projectors.