Everything You Need to Know About Motion Detection

 

Everything You Need to Know About Motion Detection 

Differences between PIR sensor and camera motion detection technologies 

Motion detection in camera systems is quite different from motion detection systems in alarm systems. For an alarm system to detect movement, the passive infrared (PIR) sensor sends a beam to an area and when the beam is broken, the sensor determines movement. For example, for pets, etc., the beam is adjusted to the optimal sensitivity to prevent unnecessary triggering of sensors. 

 

Motion detection in cameras is based on a different and easier basis. The camera produces an image that the recorder sees as an algorithm. When something changes in the algorithm, the recorder interprets it as a gesture. Clouds passing over the camera can transform pixels in the image into algorithms, causing the recorder to interpret it as motion. Similarly, if there are plants moving in the wind, they can cause incorrect warnings due to the algorithm change. 

How to fix the false alarm problem? 

To avoid such false alerts, you need to change some settings in the DVR. First, go to the Main Menu, click the "Detect" tab, and then select the channel you selected. Adjust the sensitivity of motion detection accordingly. A mid-range sensitivity setting is usually 3. You can also choose 2 or 1 to avoid too many false snudges. 1 is the lowest sensitivity range, while the highest sensitivity is generally 6. 

PTZ Security Cameras 

Pan Tilt Zoom (PTZ) cameras capable of automatic monitoring are suitable for tracking an object entering its area. For this reason, PTZ security cameras should be installed in areas where movement is required. If an object changes the pixel of an image, the camera will react by starting to track why the pixels change. 

 

This is a great feature for the camera, but it also has some shortcomings. First, if two objects come to the camera's line of sight and then move in opposite directions, the camera monitors the larger object. The second deficiency is that the camera monitors the object and the object stops for a while. The camera returns to its normal position and the object can resume movement unnoticed. These problems can be overcome by adding analytics to the PTZ camera. 

Analytics 

Analytics are programs that work to analyze real-time images to determine specific criteria. The criteria are determined according to the user's requirements. For example, a user can set the following criterion: If an object goes in this direction and crosses this line, record, take a snapshot, and trigger an alarm. Some analysis programs allow the user to find a specific person. By reviewing the recorded images, the path taken by the person can be comprehensively determined. You can find other PTZ camera information in our website.

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