Intrusion detection analytics can be used with optical or thermal cameras. The optimal distance between a camera and object or person depends on the camera and lens.
Refer to the values listed in the following table as guidelines:
|Minimum object size for optical cameras||Height or width of an object should be greater than 20 pixels|
|Minimum object size for thermal cameras||
|Minimum resolution (depends on object size and distance)||CIF (352 x 288 pixels)|
|Minimum frame rate||12 fps|
|Optimal distance (depends on the camera and lens)||
|Maximum distance (depends on the scene, camera, and lens)||