# TestClassifierSnapshot

Evaluates the performance of a classifier snapshot using training images that were set aside for evaluation purposes.

To use this action, you must have enabled snapshots and you must have built the classifier. For more information about snapshots, refer to the Media Server Administration Guide and the documentation for the action SetClassifierTrainingOption.

Type: asynchronous

Parameter | Description | Required
--- | --- | ---
`classifier` | The name of the classifier. | Yes
`snapshotindex` | The index number of the snapshot to test. To view available snapshots, use the ListClassifiers action. | Yes

## Example

    /action=TestClassifierSnapshot&classifier=vehicles&snapshotindex=0

## Response

This action is asynchronous, so Media Server always returns success accompanied by a token. You can use this token with the QueueInfo action to retrieve the status of your request.

After the action has finished, you can obtain the results of the test through the action GetClassifierSnapshotStatistics. You can then select the snapshot to use by running the action SelectClassifierSnapshot.

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