# Face Recognition

This section describes the actions that you can use to train face recognition.

NOTE: Apart from ListFaceDatabases, ListFaces, and GetFaceImage, all of these actions are administrative actions. Administrative actions can be sent only by users who belong to an authorization role that allows the `Admin` standard role, or which enables the action explicitly. See Authorization Roles Configuration Parameters.

AddFaceImages | Adds training images to a face.
AddFaceMetadata | Adds custom metadata (a key-value pair) to a face.
BuildAllFaces | Trains Media Server to recognize any faces that exist in its database and need training.
BuildFace | Trains Media Server to recognize a face.
CreateFaceDatabase | Creates a new, empty, database to store faces for face recognition.
ExportFaceDatabase | Exports a face recognition database.
GetFaceImage | Returns a training image associated with a face.
ImportFaceDatabase | Imports a face recognition database.
ListFaceDatabases | Lists the databases that have been created to store faces for use with face recognition.
ListFaces | Returns a list of faces in a specified database.
MoveFace | Moves a face from one database to another.
MoveFaceImage | Moves a training image from one face to another.
NewFace | Adds a new face to a database of faces.
NullFaceImageData | Removes (deletes) face images from a face, but does not remove the training generated from those images.
RelabelFaceImage | Relabels a face image.
RemoveFace | Removes (deletes) an existing face.
RemoveFaceDatabase | Removes (deletes) a database that stores faces.
RemoveFaceImages | Removes training images from a face.
RemoveFaceMetadata | Removes custom metadata (a key-value pair) from a face.
RenameFace | Changes the identifier for a face that you have already added to a database.
RenameFaceDatabase | Renames a database that stores faces.
SyncFaces | Forces Media Server to synchronize with the latest face training data in the database.
TrainFace | Train Media Server to recognize a face with a single action.
UnsyncFaces | Removes all face recognition training from memory (does not affect the database).
UpdateFaceMetadata | Updates the value of a key-value pair in the custom metadata of a face.

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