文章基本信息

标题：選手領域の抽出と追跡によるサッカーの自由視点映像生成
本地全文：下载
作者：三功浩嗣 ; 内藤整
期刊名称：映像情報メディア学会誌
印刷版ISSN：1342-6907
电子版ISSN：1881-6908
出版年度：2014
卷号：68
期号：3
页码：J125-J134
DOI：10.3169/itej.68.J125
出版社：The Institute of Image Information and Television Engineers
摘要：In this paper, we propose a robust object tracking scheme for multi-view cameras and consecutive frames for rendering an immersive free-viewpoint video in a large outdoor space such as a soccer stadium. For a free-viewpoint video that provides users with an immersive experience, each object has to be identified consistently among all cameras for every frame to share the textures of the same objects and replace the textures when an occlusion occurs. To satisfy this requirement, the proposed method extracts objects' silhouette regions and tracks each identified object by associating a closed silhouette region with a tracking ID for every camera. During the frame by frame process, our method confirms whether occlusion occurs for each tracking region and modifies the texture region by projecting the world coordinate of the object in 3D-space, which can be estimated from a camera image without occlusion if one is available. The experimental results revealed that the proposed method achieved more robust texture extraction of multiple objects especially for occluded regions compared to the conventional methods. Furthermore, it was confirmed that the proposed scheme can improve the subjective image quality for free-viewpoint video as a result of precise reconstruction of occluded regions.
关键词：自由視点;オブジェクト追跡;オクルージョン;パーティクルフィルタ;複数カメラ