| 虚拟演播室系统中的无限蓝箱技术 |
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| 引用本文： | 鲁敏,匡纲要,郁文贤.虚拟演播室系统中的无限蓝箱技术[J].国防科技大学学报,2003,25(6):21-25. |
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| 作者姓名： | 鲁敏 匡纲要 郁文贤 |
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| 作者单位： | 国防科技大学电子科学与工程学院,湖南,长沙,410073 |
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| 摘 要： | 虚拟演播室是虚拟现实技术在电视制作领域中的一项崭新应用。无限蓝箱技术通过外部生成的键信号,将前景视频图像中非蓝箱内的景物滤除,使摄像机的运动可以不受实际蓝箱尺寸的限制。针对任意形状的蓝箱结构和摄像机的任意自由度运动,提出了虚拟演播室系统中通用的无限蓝箱算法,该算法根据蓝箱实际的透视投影变换过程,精确提取蓝箱区域,生成色键信号。实验结果证明,该算法生成的色键区域精确、计算简单、通用性强,很好地满足了虚拟演播室系统的要求。
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| 关 键 词： | 虚拟演播室 无限蓝箱 透视投影 裁剪 多边形填充 色键 |
| 文章编号： | 1001-2486(2003)06-0021-05 |
| 收稿时间： | 2003/5/20 0:00:00 |
| 修稿时间： | 2003年5月20日 |
Unlimited Blue-box Technique in Virtual Studio |
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| LU Min,KUANG Gangyao and YU Wenxian.Unlimited Blue-box Technique in Virtual Studio[J].Journal of National University of Defense Technology,2003,25(6):21-25. |
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| Authors: | LU Min KUANG Gangyao and YU Wenxian |
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| Institution: | College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China |
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| Abstract: | Virtual studio is a new application of virtual reality in TV program production. Unlimited blue-box technique is the way to cover the scenery out of blue-box with an external chroma-key signal. It extends the movement of the camera in virtual studio. A universal unlimited blue-box technique is proposed based on the perspective projection. It can be applied to all kinds of blue-box structures and varied camera movements. The experiment result demonstrates that this technique is accurate and robust, and is sufficient to the requirements of virtual studio. |
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| Keywords: | virtual studio unlimited blue-box perspective projection clipping polygon fill chroma-key |
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