# Image Hash

The image hash analysis task compares images to image hashes you have added to the Media Server database. You can use image hash analysis to identify exact duplicates in a set of images, because identical images have identical hashes.

Configuration Parameter | Description
--- | ---
Database | The image hash database to use to identify duplicate images.
Identifier | A comma-separated list of identifiers that specifies the image hashes to compare the ingested image to.
Input | The track that you want to process.
MatchThreshold | The minimum confidence score required for a match.
Metadata | A metadata field name and value that specifies the image hashes to compare the ingested image to.
SyncDatabase | Specifies whether to synchronize with the training database before beginning the analysis task.
Type | The analysis engine to use. Set this parameter to `ImageHash`.

## Output Tracks

Output track | Type | Description | Output1This column indicates whether the information contained in the track is included by default in the output created by an output task (when you don't set the Input parameter for the output task).
--- | --- | --- | ---
`Result` | ImageHashResult | Contains one record for every match between an analyzed image and an image hash in the training database, where the confidence score exceeds the value of the MatchThreshold parameter. | Yes

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