There are three modes of storing faces and related data, depending on the value of the following registry keys (see Registry keys reference guide):


It is not recommended to store the folder for storing faces and related data on the same disk where the video archive is stored (see Selecting the disks for video archive storage).

Modes of Face Intellect operation and storing faces and related data for each value of the UseFaceDB key are given in the table.

UseFaceDBReference faces Captured facesRecognized facesVectors Metadata Functional mode
0Database and <Intellect installation directory>\Bmp\<Person> folderDatabase

Database

Information about recognized faces is stored in the Hits table.

When an event of recognition occurs, an entry in the Hits table is added to match a captured face identifier in the FIRS table with reference face identifier in the Persons table.

Database Database
  • Face search first connects to the database, reads the data set, compares it, and saves the result. This is the slowest search process.
  • Metadata, images and vectors are stored in the database. As a consequence, the database quickly overflows and begins to be automatically cleaned, which does not provide sufficient storage depth.
1Database; folder set by the FaceDB registry key; <Intellect installation directory>\Bmp\<Person> folderDatabase and the folder specified by the FaceDB keyDatabase and the folder specified by the FaceDB keyDatabase and the folder specified by the FaceDB keyDatabase
  • At startup, the server reads all the data from the folder into memory and performs the search. Further the received data are written to the memory, to the database and to the folder. This is the fastest search process.
  • All search is carried out in operative memory. As a consequence, there is a high memory consumption and a longer server start.
  • Metadata, images and vectors are also stored in the database. As a consequence, the database quickly overflows and begins to be automatically cleaned, which does not provide sufficient storage depth.
2Database; folder set by the FaceDB registry key; <Intellect installation directory>\Bmp\<Person> folderFolder specified by the FaceDB keyFolder specified by the FaceDB keyFolder specified by the FaceDB keyDatabase
  • At startup, the server reads all the data from the folder into memory and performs the search. Further the received data are written to the memory, to the database and to the folder. This is the fastest search process.
  • All search is carried out in operative memory. As a consequence, there is a high memory consumption and a longer server start.
  • Metadata is stored in the database, but images and vectors are stored only in the folder on disk. As a result, the database overflows slower and provides maximum storage depth.


Reference face photos from the <Intellect installation directory>\Bmp\<Person> folder can be used for automatic face verification with a script (see Appendix 2. Examples of widely used scripts). Also, with the help of the Event manager module which is the part of ACFA Intellect software, the operator controlling the Event manager interface window can decide whether the face looking at the camera is to be verified or not. In this case the operator compares this face with the reference one from the <Person> folder that is shown in the Event manager interface window (for details see Event Manager Module Settings and Operation Guide).

The mode with the UseFaceDB = 2 key value provides the maximum search speed and storage depth, and starting with Face Intellect 7.1 is the default mode.