METHOD OF DETERMINING A PROJECTION MATRIX BASED ON A VIDEO IMAGE TO DETERMINE THE PROJECTION MATRIX WITHOUT AN OPTIMIZING PROCESS

摘要

PURPOSE: A method of determining a projection matrix based on a video image is provided to determine the projection matrix used for tracing a track of a camera from the video image photographed by the camera and for reforming a 3D structure of the video image without an optimizing process. CONSTITUTION: A key frame is selected from a video image photographed by a moving camera(S10). A projective absolute quadric in a projective space is estimated from the key frame(S20). A spatial projective transformation matrix is obtained from the estimated projective absolute quadric(S30). A projection matrix is obtained from the spatial projective transformation matrix(S40).