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VisionLabs software module is licensed according to the following scheme:

Module in use	Licensing scheme
Visitor counting channel	By the number of channels
Archive search channel	By the number of channels
Recognition channel	By the number of faces in the database

Thus, the intellect.sec key file is purchased for each camera in use and a certain number of faces stored in the database. Additional key files are not required.

To use the VisionLabs software module in multi-threading mode, the number of faces in the database is determined as follows:

If the number of face detectors used is greater than or equal to the value of the CpuCoreCount registry key, then the license is purchased for the number of faces in the database, which is defined as: the required number of reference faces + the value of the CpuCoreCount key.
If the number of face detectors used is less than the value of the CpuCoreCount registry key, then the license is purchased for the number of faces in the database, which is defined as: the required number of reference faces + the number of face detectors used.

For example:

If CpuCoreCount = 4, and the configuration includes 4 or more face detectors, then a license for 104 reference faces should be purchased for a database with 100 reference faces.
If CpuCoreCount = 4, and the configuration includes 1 face detector, then a license for 101 reference faces should be purchased for a database with 100 reference faces.

In both cases, the actual number of reference faces that can be contained in the database will be 100.

See Registry keys reference guide, for details about working with the registry, see Working with Windows OS registry.

You also need to purchase a software key from VisionLabs and apply it in the Sentinel Admin Control Center web portal (http://127.0.0.1:1947).