The Tevian face recognition module operates using one of the following algorithms:

1. Fast and less resource-intensive algorithm.
2. Slow and more resource-intensive algorithm providing the higher quality of recognition for large samples.

The fast algorythm is used by default. Use the TevianAlgorithmNumber registry key to switch over used algorithms (see the Registry Keys Reference Guide, the current version of the document is available in the AxxonSoft documentation repository).

Vectors received by one algorithm can not be used with vectors received by another algorithm without additional processing. Conversion is requred to use the vectors received by one algorithm with vectors received by another algorithm without repeated adding of faces to the database.    

Conversion of vectors also enables using the  vectors received by another recognition module, e.g. Cognitec, if it is replaced by the Tevian recognition module.

Vectors are converted as follows:

1. Left click to the  icon in the Windows taskbar (system tray).
2. In the opened window select Tools -> Recreate firs.
   

3. Wait for completion of biometric vectors converting.

Vectors are now converted.