Dynamic 3D stabilization for video CG composite

We propose a method to estimate camera parameters from video sequences for the purpose of natural CG composite remarking the problem of stabilization. When the video is taken under wrong condition, it is inescapable that the estimated parameters contain nonnegligible errors which cause an unexpected shaking of CG object. To avoid this problem, we introduce a smoothing technique taking account of a property of synthesizing object. The method is based on an idea that the estimated camera parameters need not to be correct so far as composite is natural, and can be varied according to the condition of CG object even though the given images are same. Introducing the factor of locational and temporal smoothness to estimate the camera parameters, we can accomplish an appropriate stabilization for particular CG composite.