Patent ID: 7555158

Claim:
A background recovering apparatus for deleting an object of an arbitrary region in an input image sequence and recovering a background, comprising: a storing means for storing the input image sequence, and storing the three dimensional (3D) position and posture information, and focal length information of a camera photographing an image; a projection matrix generating means for generating a projection matrix of a first view point by using the 3D position and posture information and focal length information of the camera photographing an image frame of the first view point, in which a deletion target object exits; a geometric information extracting means for extracting 3D geometric information with respect to the background by using the 3D position and posture information, focal length information, and the background region coordinates of the camera photographing an image frame of another view point that reveals the background behind the deletion target object; a background image generating means for generating the background image whose view point is changed into the first view point by multiplying the 3D geometric information for the background extracted from image frame of another view point by the projection matrix; and a background image inserting means for recovering the background by inserting the background image, whose view point is changed into the first view point, into an arbitrary region of the first view point.