Event detection and analysis from video streams
Event detection and analysis from video streams
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DOI：
10.1109/34.946990
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发表时间：
2001-08-01
影响因子：
23.6
通讯作者：
Nevatia, R
中科院分区：
文献类型：
--
作者：
Medioni, G;Cohen, I;Nevatia, R
我们提出了一个系统，它作为输入从空中移动平台获得的视频流，并产生在场景中的移动对象的行为的分析。为了实现这一功能，我们的系统依赖于两个模块。第一个检测和跟踪序列中的移动区域。它使用一组多尺度的特征来稳定图像序列，即补偿观察者的运动，然后提取具有残余运动的区域，并使用属性图表示来推断它们的轨迹。第二个模块将这些轨迹以及用户提供的地理空间背景和目标背景形式的信息作为输入，以实例化可能的场景。我们提出的系统的细节，连同一些真实的视频序列的结果，也提供了一个定量分析的结果。
We present a system which takes as input a video stream obtained from an airborne moving platform and produces an analysis of the behavior of the moving objects in the scene. To achieve this functionality, our system relies on two modular blocks. The first one detects and tracks moving regions in the sequence. It uses a set of features at multiple scales to stabilize the image sequence, that is, to compensate for the motion of the observe, then extracts regions with residual motion and uses an attribute graph representation to infer their trajectories. The second module takes as input these trajectories, together with user-provided information in the form of geospatial context and goal context to instantiate likely scenarios. We present details of the system, together with results on a number of real video sequences and also provide a quantitative analysis of the results.