Examining the applicability of virtual reality technique for video retrieval
Examining the applicability of virtual reality technique for video retrieval
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DOI：
10.1109/cbmi.2012.6269807
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
Kimiaki Shirahama;K. Uehara;M. Grzegorzek
中科院分区：
文献类型：
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作者：
Kimiaki Shirahama;K. Uehara;M. Grzegorzek
按示例查询（QBE）方法检索在视觉上类似于用户提供的示例镜头的镜头。但是，如果没有示例镜头，QBE就无法工作。为了克服这个问题，本文开发了虚拟示例查询（QBVE）方法，其中使用虚拟现实技术创建查询的示例镜头（虚拟示例）。通过合成用户的手势、3D对象和背景图像来创建虚拟示例。使用大规模的视频数据，我们从视频检索的角度来检验虚拟示例的有效性。特别是，我们研究了虚拟例子和从真实的视频中选择的例子镜头之间的比较，相机运动的重要性，手势，3D对象和背景的组合策略，以及用户的个体差异。
Query-By-Example (QBE) approach retrieves shots which are visually similar to example shots provided by a user. However, QBE cannot work if example shots are unavailable. To overcome this, this paper develops Query-By-Virtual-Example (QBVE) approach where example shots (virtual examples) for a query are created using virtual reality technique. A virtual example is created by synthesizing the user's gesture, 3D object and background image. Using large-scale video data, we examine the effectiveness of virtual examples from the perspective of video retrieval. In particular, we study about the comparison between virtual examples and example shots selected from real videos, the importance of camera movements, the combination strategy of gestures, 3D objects and backgrounds, and the individual difference in users.