When you change the used face recognition module, for example, replace the Cognitec module with the Tevian module or vice versa, the biometric vectors are automatically re-generated. This is necessary because biometric vectors received by one face recognition module cannot be used by another.

The biometric vectors are also automatically re-generated when you switch the Tevian SDK version or the face recognition and search algorithm of Tevian and VideoIntellect 1.1 face recognition modules.

To switch between the used face recognition modules, use the Tevian.IdentificationAlgorithm registry key (see Registry keys reference guide, for details about working with the registry, see Working with Windows OS registry).


  • Re-generation of biometric vectors is available if initial vectors were received by the Face Intellect software not older than 5.2 version.
  • If the VisionLabs face recognition module is used, then after updating the Face Intellect 7.0 to a newer version, it is necessary to start re-generating vectors.

The re-generation of biometric vectors is performed in the background without disturbing the face recognition system operation. Firstly, the faces which are already entered in the database are re-generated. The current process of biometric vectors re-generation is displayed in the Face recognition and search interface module, on the Statistics tab, in the Faces in RAM field (see Displaying the statistics). If the Server is restarted, the process of re-generating the remaining faces will continue automatically.

By default, the biometric vectors are re-generated on one CPU thread. Using the Update.CpuCoreCount registry key, you can set an arbitrary number of threads on which biometric vectors will be re-generated (see Registry keys reference guide).

You can also re-generate the biometric vectors manually. To do this:

  1. Left click the  icon (Face Recognition Server) in the Windows taskbar (system tray) (for details about the Face Recognition Server debug window see Appendix 2. Debug window).
  2. In the opened window select Tools -> Recreate firs.

  3. Wait for completion of biometric vectors re-generation.

Errors may occur during the biometric vectors re-generation process.

For example, the error below may occur due to the fact that the new face recognition module SDK or the algorithm of the Tevian ALG2 face recognition module cannot recognize a face on a poor quality image and recreate a vector due to its better and more demanding recognition capabilities. Therefore, such image can be skipped.

[FIRSERVER][1] ERROR: Problem with regenerating fir for id 79656915-5BC1-E811-AA3F-1C1B0D34F0DF, skipping ...

If Intellect malfunctions after the vectors re-generation, do the following:

  1. Shutdown Intellect.
  2. Run FaceRecognitionTool.exe tool stored at: <Intellect installation folder>\Modules.

  3. Specify required settings - in the Path field specify the path to the folder where the data will be uploaded to (e.g. C:\Backup).

  4. Upload the data.

    Find more information on FaceRecognitionTool.exe in Face Recognition tool utility for extracting captured and reference faces from the database section.


  5. Execute the following script in the database manager (e.g. SQL Server Management Studio):

    USE [Fir]
GO
DECLARE	@return_value int
EXEC	@return_value = [dbo].[spReset]
SELECT	'Return Value' = @return_value
GO


  6. Start Intellect and upload images from the folder specified in the Path field to the reference face database (see Selecting a way to upload an image to the reference face database).