An effect where a portion of a background scene is replaced by a new video.
一种背景场景的一部分被一个新的图像替代的效果。
The first thing that happens for the Scene is to create a background fill.
Scene执行的第一个操作是创建一个背景填充。
The dusk scene required a little more matte painting to complete the background.
黄昏场景需要在背景上增加一些数字绘景进行完善。
First, it builds the background model by observing the scene without people in it.
在检测开始之前，首先由摄像机对无人环境持续观测一段时间，建立背景的统计模型；
First, it builds the background model by observing the scene without people in it.
在检测开始之前，首先由摄像机对无人环境持续观测一段时间，建立背景的统计模型；
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