OBSERVATION POSITION TRACKING TYPE VIDEO IMAGE PROVIDING APPARATUS AND OBSERVATION POSITION TRACKING TYPE VIDEO IMAGE PROVIDING PROGRAM, AND VIDEO IMAGE PROVIDING APPARATUS AND THE VIDEO IMAGE PROVIDING PROGRAM

摘要

PPROBLEM TO BE SOLVED: To project accurate projection images without geometrical distortions by detecting an observation point of an observer and a shape of a projection face, and changing the video image providing position, depending on the observation point. PSOLUTION: An observation position tracking type video image providing apparatus includes a video image input means 4 for inputting a projection image to a projector 1; an observation point detection means 5, regarding the position at which the observer observes a projected projection image as the observation point and detecting the observation point from a second imaged image; a projection screen shape measurement means 5 that measures the three-dimensional shape of the projection screen on the basis of a correspondence pattern projection-output to the projection screen by the projector 1, a correspondence point between the projector 1 and a first imaging apparatus, an internal parameter and an external parameter of the projector 1 and an internal parameter and an external parameter of the first imaging apparatus, which are given, in advance; and a video image correction means 7 that applies geometrical conversion to the projection image, by using the observation point and the three-dimensional shape of the measured projection screen, to thereby generate a correction video image image. PCOPYRIGHT: (C)2008,JPO&INPIT