Panasonic BL-C140A - Outdoor MPEG-4 Network Camera Installation Manual page 10

Detection Range Characteristics of the Motion Detection Feature
• Motion detection becomes more difficult as it becomes darker.
• The motion detection function works by detecting changes in contour and brightness in moving
objects. This is done in order to reduce inaccurate detections due to changes in brightness.
• The camera can easily detect motion when objects move sideways in front of the camera, but
cannot easily detect motion when objects move toward the front of the camera.
Detection range
About 58
10
Difficult to detect
Camera
Easy to detect