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:
| Function | Requirement |
|---|---|
| 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) |
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| Maximum distance (depends on the scene, camera, and lens) |
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