An IP camera is designed to monitor rooms, doorways or other sensitive areas, and issue a notification when a person moves in these areas. For this to work, the camera must continuously create an image
Compare and this previous images.
Lying here before relevant differences, this may indicate a movement of a person or an object point.Depending on the setting options
, a message is generated with the then the authorized user of the camera is made to the detected motion. A good model has setting options to situational adjust the alarm threshold.
The function of the motion detection in detail
The camera software puts the individual recorded images of the situation from several internal latches.Thus, different images can be compared. In principle is matched to individual pixel comparison but perhaps too well. It is therefore necessary that the individual images are first fed to a normalization.Here, different brightness values are eliminated, which are due to different light intensities could be the daily routine requires.
The IP camera compares the current (normalized) image with the previous image, and then outputs an alarm if the differences between the images over a defined threshold are. What happens after the alarm depends on the other data connection. It is conceivable, for example, that an automated email is generated, which is transmitted via the Internet server to legitimate users.
With the mail the images can be transferred, wherein the alarm triggering event has taken effect. What actions must be chosen then, is in the hands of users. With frequent false alarms, the threshold needs to be changed.