A video-based virtual reality system
Proceedings of the ACM symposium on Virtual reality software and technology
Making of a Virtual World of Heijokyo from Historical Knowledge
VSMM '01 Proceedings of the Seventh International Conference on Virtual Systems and Multimedia (VSMM'01)
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We propose a method to estimate camera parametersfrom video sequences for the purpose of natural CGcomposite remarking the problem of stabilization. Whenthe video is taken under wrong condition, it isinescapable that the estimated parameters contain nonnegligible errors which cause an unexpected shaking ofCG object. To avoid this problem, we introduce asmoothing technique taking account of a property ofsynthesizing object. The method is based on an idea thatthe estimated camera parameters need not to be correctso far as composite is natural, and can be variedaccording to the condition of CG object even though thegiven images are same. Introducing the factor oflocational and temporal smoothness to estimate thecamera parameters, we can accomplish an appropriatestabilization for particular CG composite.