Patent ID: 6147716
Filing Date: 2000-11-14
Classification: G06T,H04N

Abstract:
A picture generator, comprising:mobile photographing means for photographing a performer in front of a predetermined background having a predetermined color to obtain first video data, said background including a plurality of inconspicuous markers each having a color similar to the predetermined color of the predetermined background;camera parameter calculating means for acquiring viewpoint information of said photographing means including three-dimensional position and orientation of the photographing means on the basis of predetermined world coordinates;first video data generating means for generating second video data corresponding to a projected picture of a predetermined object to which perspective transformation in a case viewed from the viewpoint of said photographing means acquired in said camera parameter calculating means is applied;data delay means for acquiring third video data delayed corresponding to time for processing said first video data in said camera parameter calculating means and said first video data generating means;first key signal generating means for generating a first key signal for separating a first picture element having the predetermined color of the predetermined background or a color similar thereto and a second picture element which is not the predetermined color of the predetermined background, based on said first video data;second key generating means for generating a second key signal for separating the first picture element having the predetermined color of the predetermined background or a color similar thereto and the second picture element which is not the predetermined color of the predetermined background, based on said first video data and for acquiring a picture switching signal for fetching either of said first video data or said second video data based upon said first video data;first video data synthesizing means for acquiring first synthetic video data by synthesizing said third video data and said second video data on the basis of said first key signal;second video data synthesizing means for acquiring second synthetic video data by switching between said first video data and said second video data on the basis of said second key signal and synthesizing them; andpicture display means for displaying a picture for assisting the performance of said performer based upon said second synthetic video data.