运动检测
维基百科，自由的百科全书
运动检测 是感觉(通常由电子设备)物理运动在一个特定区域。 主要方法 行动 可以被辨认是红外侦查和音响侦查。 行动可能容易地查出运动的侦查传感器是可利用的并且导致警报或交换图象录音设备。 有使用的运动检测器 照相机 连接到a 计算机 并且这查出某一对象移动。
对这样侦查的首要申请是 (a)未批准的词条的侦查， (b)触发照相机记录随后事件区域的居住的停止的一个移动的对象的侦查熄灭照明设备的和( c)侦查。 运动检测器因而是电子保安系统制轮楔，但也是一个可贵的工具在防止 照亮的没人住的空间.
一简单 算法 为运动检测 由一台固定的照相机当前图象与参考图象比较和简单地计数数量的不同 映像点. 因为图象将自然地不同由于因素例如变化的照明设备，照相机 忽悠和 CCD 光电倍增管中的暗流预先处理是有用减少数字 假阳性 警报。
更加复杂的算法是必要查出行动，当照相机移动时，或者，当在包含可以被忽略的其他运动时的领域必须查出一个具体对象的行动。 例子在也许是访客围拢的绘画 美术画廊.
当运动检测 由自然有机体时完成，我们讲话 行动悟性.
Motion detection is the sensing (usually by electronic devices) of physical movement in a given area. The principal methods by which motion can be identified are infra-red detection and acoustical detection. Motion detection sensors are available which can easily detect movement and produce an alarm or switch on an image recording device. There are motion detectors which employ cameras connected to a computer and this detects certain objects moving.
The chief applications for such detection are (a) detection of unauthorized entry, (b) detection of cessation of occupancy of an area to extinguish lighting and (c) detection of a moving object which triggers a camera to record subsequent events. The motion detector is thus a lynchpin of electronic security systems, but is also a valuable tool in preventing illuminating unoccupied spaces.
A simple algorithm for motion detection by a fixed camera compares the current image with a reference image and simply counts the number of different pixels. Since images will naturally differ due to factors such as varying lighting, camera flicker, and CCD dark currents, pre-processing is useful to reduce the number of false positive alarms.
More complex algorithms are necessary to detect motion when the camera itself is moving, or when the motion of a specific object must be detected in a field containing other movement which can be ignored. An example might be a painting surrounded by visitors in an art gallery.
When motion detection is accomplished by natural organisms, we speak of motion perception.
