# Image Hash

This section describes the actions that you can use to train image hash analysis.

NOTE: Apart from ListImageHashDatabases, ListImageHashes, and GetImageHashImage, 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.

AddImageHashMetadata | Adds custom metadata (a key-value pair) to an image hash.
CreateImageHashDatabase | Creates a new, empty, database to store image hashes.
ExportImageHashDatabase | Exports an image hash database.
GetImageHashImage | Returns the training image associated with an image hash.
ImportImageHashDatabase | Imports an image hash database.
ListImageHashDatabases | Lists the databases that have been created to store image hashes.
ListImageHashes | Returns a list of image hashes in a specified database.
MoveImageHash | Moves an image hash from one database to another.
NullImageHashImageData | Removes (deletes) the training image from an image hash, but does not remove the training generated from the image.
RelabelImageHashImage | Relabels the training image for an image hash.
RemoveImageHash | Removes (deletes) an existing image hash.
RemoveImageHashDatabase | Removes (deletes) a database that stores image hashes.
RemoveImageHashMetadata | Removes custom metadata (a key-value pair) from an image hash.
RenameImageHash | Changes the identifier for an image hash that you have already added to a database.
RenameImageHashDatabase | Renames a database that stores image hashes.
SyncImageHashes | Forces Media Server to synchronize with the latest training data in the database.
TrainImageHash | Adds a new image hash and trains Media Server to identify duplicate images.
UnsyncImageHashes | Removes all image hash training from memory (does not affect the database).
UpdateImageHashMetadata | Updates the value of a key-value pair in the custom metadata of an image hash.

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