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# Face State Analysis

Face State analysis provides additional information about detected faces, for example:

- The facial expression.
- Whether the person's eyes are open.
- Whether the person is wearing spectacles.

Configuration Parameter | Description
--- | ---
Input | The track that you want to process.
NumParallel | The maximum number of video frames to analyze simultaneously.
Type | The analysis engine to use. Set this parameter to `FaceState`.

## 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` | FaceStateResult | Contains a record for each detected face. Each record contains information such as facial expression, whether the eyes are open, and whether the person is wearing spectacles. | Yes
`ResultWithSource` | FaceStateResultAndImage | Contains the same information as the `Result` track, but also includes the best source frame. | No

FaceStateResult

Field name | Type | Description
--- | --- | ---
id | UUIDData | A universally unique identifier to identify the face
face | FaceData | Information about the detected face
expression | String | A string describing the facial expression (`Happy` or `Neutral` or `Unknown`)
eyesopen | Boolean | Indicates whether the person's eyes are open (`true` or `false` or `unknown`)
spectacles | Boolean | Indicates whether the person is wearing spectacles (`true` or `false` or `unknown`)

FaceStateResultAndImage

Field name | Type | Description
--- | --- | ---
id | UUIDData | A universally unique identifier to identify the face
face | FaceData | Information about the detected face
expression | String | A string describing the facial expression (`Happy` or `Neutral` or `Unknown`)
eyesopen | Boolean | Indicates whether the person's eyes are open (`true` or `false` or `unknown`)
spectacles | Boolean | Indicates whether the person is wearing spectacles (`true` or `false` or `unknown`)
image | ImageData | The source frame

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