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정경훈,박경세,송재극,이충웅 한국방송공학회 1995 한국방송공학회 학술대회 Vol.1 No.1
This paper presents a layered image representation and coding algorithm which is based on the concept of quadtree decomposition. While mean value of the decomposed block is used as the representative and for the homogeneity test in conventional quadtree algorithms, we adopt the algorithm which uses the knee pixel of the corresponding block as the representative. The use of the knee pixel enables the proposed algorithm to be adequate for the layered image representation at various resolutions. Also it does not generate blocking artifacts without using additional post-processing. Even though the proposed algorithm is rather simple, it shows good performance in objective measure as well as subjective quality.
박종일,정경훈,박경세,송재극 한국방송공학회 1995 한국방송공학회 학술대회 Vol.1 No.1
Video composition is to integrate multiple image materials into one scene. It considerably enhances the degree of Freedom in producing various scenes. However, we need to adjust the viewing points and the image planes of image materials for high quality video composition. In this paper, we propose an intelligent video composition technique concentrating on the composition of CG and real scene. i-e first model the camera system. The projection is assumed to be perspective and the camera motion is assumed to be 3D rotational and 3D translational. Then. automatically extract camera parameters comprising the camera model from real scene by' a dedicated algorithm. after that, CG scene is generated according to the camera parameters of the real scene. Finally the two are composed into one scene. Experimental results justify the validity of the proposed method.