哪里和什么:在监控视频中检测上下文动态意识异常
概括
这项研究引入了一种新的时间语义关系网络 (TSRN),用于监控中强大的异常检测. 该系统准确地识别事件位置和原子动作,在具有挑战性的环境中显著减少虚假报警.
科学领域:
- 计算机科学 计算机科学
- 人工智能的人工智能
- 机器学习 机器学习
背景情况:
- 在监视中检测异常至关重要,但由于复杂的环境动态和人类行为而受到挑战.
- 现有的方法在局部化异常 (在哪里) 和准确识别微妙事件 (什么) 上扎,原因是隐含的现场信息和处理监视特定条件的局限性.
- 挑战包括视图变化,低光,拥挤的场景和微妙的行为,妨碍准确的事件解释.
研究的目的:
- 开发一个强大的异常检测系统,克服现有的单模式和多模式方法的局限性.
- 为了提高监控录像中异常的位置 (在哪里) 和性质 (什么) 的识别的准确性.
- 为了提高实用性和减少虚假警报在现实世界的监控应用程序.
主要方法:
- 使用轻量级场景分类模型来提取基于位置的明确上下文 (在哪里).
- 专注于检测原子动作,以精确识别异常行为 (什么),解决未经探索的方面.
- 提出了时间-语义关系网络 (TSRN),以模拟多式联络特征之间的时空关系.
- 采用分段选择性焦点利损失 (SFML) 来有效管理阶级不平衡.
主要成果:
- 与传统的基于MIL的方法相比,TSRN系统表现出更高的性能.
- 对公共数据集的实验结果显示,虚假报警的数量显著减少.
- 该系统保持了对现实世界监控应用的稳定性和实用性.
结论:
- 拟议的TSRN系统通过整合位置上下文和原子作用分析,有效地解决了异常的"何处"和"什么".
- 该方法为在具有挑战性的监控环境中检测异常提供了实用且强大的解决方案.
- 该方法在提高自动化监控系统的可靠性和效率方面具有前景.
相关概念视频
Relative Motion Analysis using Rotating Axes
876
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
876
Difference from Background: Limit of Detection
8.0K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
The LOD indicates the presence or absence...
8.0K
Relative Motion Analysis using Rotating Axes-Problem Solving
695
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
Here, in order to determine the magnitude of velocity and acceleration for point...
695
Naturalistic Observations
17.0K
If you want to understand how behavior occurs, one of the best ways to gain information is to simply observe the behavior in its natural context. However, people might change their behavior in unexpected ways if they know they are being observed. How do researchers obtain accurate information when people tend to hide their natural behavior? As an example, imagine that your professor asks everyone in your class to raise their hand if they always wash their hands after using the restroom. Chances...
17.0K
Relative Motion Analysis - Acceleration
810
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
810

