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Author Topic: DCS Network Cameras - Motion Detection vs. PIR  (Read 11125 times)

JavaLawyer

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DCS Network Cameras - Motion Detection vs. PIR
« on: April 16, 2014, 11:03:33 AM »

All currently available D-Link network cameras offer motion detection support.  The manner in which motion detection is implemented may vary between D-Link models. This FAQ describes the two technologies used to implement motion detection on D-Link network cameras.

Passive InfraRed Sensor (PIR)

PIR motion detection is typically available on higher-end D-Link Cloud camera models. This technology operates on the premise of detecting movement of heat signatures within the camera field of view. For example, the movement of a person traversing the network camera field of view will cause PIR enabled cameras to trigger a motion detection event, which may result in a notification alert to the network camera owner. PIR as implemented on D-Link Cloud cameras does not have any sensitivity settings. Additionally, PIR has a distance limitation which may vary between different D-Link network camera models.

Algorithmic Based (simply called "Motion Detection" in D-Link network cameras)

Not to be confused with PIR, Motion Detection operates on the premise of calculating the difference between consecutive frames from the network camera live feed. This technology examines how the individual pixels change from image to image. D-Link cameras offer a sensitivity setting which determines the threshold for triggering a motion detection event. Setting a high sensitivity (e.g. 90%) will cause subtle changes to trigger an event. Setting a low sensitivity (e.g. 10%) will require drastic changes to trigger an event. Motion Detection does not have the distance limitations observed in PIR.

D-Link cameras offering both PIR and Motion detection offer the ability to enable both techniques at the same time, resulting in two methods to detect motion.

Additional References:

« Last Edit: December 18, 2014, 03:55:36 PM by JavaLawyer »
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