Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Joint Rendering and Segmentation of Free-Viewpoint Video | Hindawi Publishing Corporation EURASIP Journal on Image and Video Processing Volume 2010 Article ID 763920 10 pages doi 2010 763920 Research Article Joint Rendering and Segmentation of Free-Viewpoint Video Masato Ishii Keita Takahashi and Takeshi Naemura Graduate School of Information Science and Technology The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan Correspondence should be addressed to Masato Ishii masato@ Received 7 December 2009 Revised 31 May 2010 Accepted 18 August 2010 Academic Editor Christophe De Vleeschouwer Copyright 2010 Masato Ishii et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. This paper presents a method that jointly performs synthesis and object segmentation of free-viewpoint video using multiview video as the input. This method is designed to achieve robust segmentation from online video input without per-frame user interaction and precomputations. This method shares a calculation process between the synthesis and segmentation steps the matching costs calculated through the synthesis step are adaptively fused with other cues depending on the reliability in the segmentation step. Since the segmentation is performed for arbitrary viewpoints directly the extracted object can be superimposed onto another 3D scene with geometric consistency. We can observe that the object and new background move naturally along with the viewpoint change as if they existed together in the same space. In the experiments our method can process online video input captured by a 25-camera array and show the result image at fps. 1. Introduction As a powerful tool for representing 3D visual information of the real world a technology called image-based rendering has attracted many researchers 1 2 . This technology can synthesize new images which are observed from
