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# Face Detection

Face Detection detects faces in media. After detecting faces you can send the information to other tasks to perform further analysis, such as face recognition.

Configuration Parameter | Description
--- | ---
ColorAnalysis | Whether to perform color analysis on detected faces to reduce false detections.
DetectTilted | Whether to detect faces that are tilted to either side when facing the camera.
FaceDirection | Face views to restrict detection to.
Input | The image track to process.
MaxInputQueueLength | Can be used to place a limit on latency.
MinSize | The minimum size of a face.
NumParallel | The maximum number of video frames to analyze simultaneously.
Orientation | The orientation of faces in the video.
Region | A region of the frame to restrict processing to.
RegionUnit | The units that the Region parameter uses to specify the size and position of a region.
RestrictToInputRegion | Specifies whether to analyze a region of the input image or video frame that is specified in the input record, instead of the entire image.
SampleInterval | The interval at which frames are selected to be analyzed.
SegmentDuration | The maximum duration of a record in the `SegmentedResult` or `SegmentedResultWithSource` track. (Available only when processing video).
SizeUnit | The units that the MinSize parameter uses to specify the minimum face size.
Type | The analysis engine to use. Set this parameter to `FaceDetect`.

## 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).
--- | --- | --- | ---
`Data` | FaceResult | Contains one record, describing the analysis results, per detected face, per video frame. | No
`DataWithSource` | FaceResultAndImage | The same as the `Data` track, but each record also includes the source frame. This information can be passed to other analysis engines to run tasks such as face recognition or demographic analysis. | No
`Event` | FaceEvent | (Deprecated) Media Server creates a record in the `Event` track when a face appears or disappears. | Yes
`Result` | FaceResult | Contains one record, describing the analysis results, for each detected face. When the same face appears in many consecutive frames, Media Server produces a single result. | Yes
`ResultWithSource` | FaceResultAndImage | The same as the `Result` track, but each record also includes the best source frame. | No
`SegmentedResult` | FaceResult | (Available only when processing video). Contains one or more records, describing the analysis results, for each detected face. The maximum duration of records in this track is limited by the parameter SegmentDuration, so multiple records are created with the same ID when a face remains in the scene for longer than this duration. | Yes
`SegmentedResultWithSource` | FaceResultAndImage | (Available only when processing video). The same as the `SegmentedResult` track, but each record also includes the best source frame. | No
`Start` | FaceResult | The same as the `Data` track, except it contains only the first record of each event. | No
`End` | FaceResult | The same as the `Data` track, except it contains only the last record of each event. | No

FaceResult

Field name | Type | Description
--- | --- | ---
id | UUIDData | A universally unique identifier to identify the face (there is one UUID per face; records with the same UUID represent the same face in different frames)
face | FaceData | Face data, including the location of the face in the frame

FaceResultAndImage

The same as `FaceResult` records, with the following additional fields.

Field name | Type | Description
--- | --- | ---
image | ImageData | The source frame

FaceEvent

Field name | Type | Description
--- | --- | ---
id | UUIDData | A universally unique identifier to identify the face (there is one UUID per face; records with the same UUID represent the same face in different frames)
event | TrackingEventData | The type of event (begin/end), and the elapsed time since the face appeared

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