Rekognition / Client / get_person_tracking

get_person_tracking#

Rekognition.Client.get_person_tracking(**kwargs)#

Gets the path tracking results of a Amazon Rekognition Video analysis started by StartPersonTracking.

The person path tracking operation is started by a call to StartPersonTracking which returns a job identifier ( JobId). When the operation finishes, Amazon Rekognition Video publishes a completion status to the Amazon Simple Notification Service topic registered in the initial call to StartPersonTracking.

To get the results of the person path tracking operation, first check that the status value published to the Amazon SNS topic is SUCCEEDED. If so, call GetPersonTracking and pass the job identifier ( JobId) from the initial call to StartPersonTracking.

GetPersonTracking returns an array, Persons, of tracked persons and the time(s) their paths were tracked in the video.

Note

GetPersonTracking only returns the default facial attributes ( BoundingBox, Confidence, Landmarks, Pose, and Quality). The other facial attributes listed in the Face object of the following response syntax are not returned.

For more information, see FaceDetail in the Amazon Rekognition Developer Guide.

By default, the array is sorted by the time(s) a person’s path is tracked in the video. You can sort by tracked persons by specifying INDEX for the SortBy input parameter.

Use the MaxResults parameter to limit the number of items returned. If there are more results than specified in MaxResults, the value of NextToken in the operation response contains a pagination token for getting the next set of results. To get the next page of results, call GetPersonTracking and populate the NextToken request parameter with the token value returned from the previous call to GetPersonTracking.

See also: AWS API Documentation

Request Syntax

response = client.get_person_tracking(
    JobId='string',
    MaxResults=123,
    NextToken='string',
    SortBy='INDEX'|'TIMESTAMP'
)

Parameters:

JobId (string) –
[REQUIRED]

The identifier for a job that tracks persons in a video. You get the JobId from a call to StartPersonTracking.
MaxResults (integer) – Maximum number of results to return per paginated call. The largest value you can specify is 1000. If you specify a value greater than 1000, a maximum of 1000 results is returned. The default value is 1000.
NextToken (string) – If the previous response was incomplete (because there are more persons to retrieve), Amazon Rekognition Video returns a pagination token in the response. You can use this pagination token to retrieve the next set of persons.
SortBy (string) – Sort to use for elements in the Persons array. Use TIMESTAMP to sort array elements by the time persons are detected. Use INDEX to sort by the tracked persons. If you sort by INDEX, the array elements for each person are sorted by detection confidence. The default sort is by TIMESTAMP.

Return type:

dict

Returns:

Response Syntax

{
    'JobStatus': 'IN_PROGRESS'|'SUCCEEDED'|'FAILED',
    'StatusMessage': 'string',
    'VideoMetadata': {
        'Codec': 'string',
        'DurationMillis': 123,
        'Format': 'string',
        'FrameRate': ...,
        'FrameHeight': 123,
        'FrameWidth': 123,
        'ColorRange': 'FULL'|'LIMITED'
    },
    'NextToken': 'string',
    'Persons': [
        {
            'Timestamp': 123,
            'Person': {
                'Index': 123,
                'BoundingBox': {
                    'Width': ...,
                    'Height': ...,
                    'Left': ...,
                    'Top': ...
                },
                'Face': {
                    'BoundingBox': {
                        'Width': ...,
                        'Height': ...,
                        'Left': ...,
                        'Top': ...
                    },
                    'AgeRange': {
                        'Low': 123,
                        'High': 123
                    },
                    'Smile': {
                        'Value': True|False,
                        'Confidence': ...
                    },
                    'Eyeglasses': {
                        'Value': True|False,
                        'Confidence': ...
                    },
                    'Sunglasses': {
                        'Value': True|False,
                        'Confidence': ...
                    },
                    'Gender': {
                        'Value': 'Male'|'Female',
                        'Confidence': ...
                    },
                    'Beard': {
                        'Value': True|False,
                        'Confidence': ...
                    },
                    'Mustache': {
                        'Value': True|False,
                        'Confidence': ...
                    },
                    'EyesOpen': {
                        'Value': True|False,
                        'Confidence': ...
                    },
                    'MouthOpen': {
                        'Value': True|False,
                        'Confidence': ...
                    },
                    'Emotions': [
                        {
                            'Type': 'HAPPY'|'SAD'|'ANGRY'|'CONFUSED'|'DISGUSTED'|'SURPRISED'|'CALM'|'UNKNOWN'|'FEAR',
                            'Confidence': ...
                        },
                    ],
                    'Landmarks': [
                        {
                            'Type': 'eyeLeft'|'eyeRight'|'nose'|'mouthLeft'|'mouthRight'|'leftEyeBrowLeft'|'leftEyeBrowRight'|'leftEyeBrowUp'|'rightEyeBrowLeft'|'rightEyeBrowRight'|'rightEyeBrowUp'|'leftEyeLeft'|'leftEyeRight'|'leftEyeUp'|'leftEyeDown'|'rightEyeLeft'|'rightEyeRight'|'rightEyeUp'|'rightEyeDown'|'noseLeft'|'noseRight'|'mouthUp'|'mouthDown'|'leftPupil'|'rightPupil'|'upperJawlineLeft'|'midJawlineLeft'|'chinBottom'|'midJawlineRight'|'upperJawlineRight',
                            'X': ...,
                            'Y': ...
                        },
                    ],
                    'Pose': {
                        'Roll': ...,
                        'Yaw': ...,
                        'Pitch': ...
                    },
                    'Quality': {
                        'Brightness': ...,
                        'Sharpness': ...
                    },
                    'Confidence': ...
                }
            }
        },
    ]
}

Response Structure

(dict) –
- JobStatus (string) –
  
  The current status of the person tracking job.
- StatusMessage (string) –
  
  If the job fails, StatusMessage provides a descriptive error message.
- VideoMetadata (dict) –
  
  Information about a video that Amazon Rekognition Video analyzed. Videometadata is returned in every page of paginated responses from a Amazon Rekognition Video operation.
  - Codec (string) –
    
    Type of compression used in the analyzed video.
  - DurationMillis (integer) –
    
    Length of the video in milliseconds.
  - Format (string) –
    
    Format of the analyzed video. Possible values are MP4, MOV and AVI.
  - FrameRate (float) –
    
    Number of frames per second in the video.
  - FrameHeight (integer) –
    
    Vertical pixel dimension of the video.
  - FrameWidth (integer) –
    
    Horizontal pixel dimension of the video.
  - ColorRange (string) –
    
    A description of the range of luminance values in a video, either LIMITED (16 to 235) or FULL (0 to 255).
- NextToken (string) –
  
  If the response is truncated, Amazon Rekognition Video returns this token that you can use in the subsequent request to retrieve the next set of persons.
- Persons (list) –
  
  An array of the persons detected in the video and the time(s) their path was tracked throughout the video. An array element will exist for each time a person’s path is tracked.
  - (dict) –
    
    Details and path tracking information for a single time a person’s path is tracked in a video. Amazon Rekognition operations that track people’s paths return an array of PersonDetection objects with elements for each time a person’s path is tracked in a video.
    
    For more information, see GetPersonTracking in the Amazon Rekognition Developer Guide.
    - Timestamp (integer) –
      
      The time, in milliseconds from the start of the video, that the person’s path was tracked. Note that Timestamp is not guaranteed to be accurate to the individual frame where the person’s path first appears.
    - Person (dict) –
      
      Details about a person whose path was tracked in a video.
      - Index (integer) –
        
        Identifier for the person detected person within a video. Use to keep track of the person throughout the video. The identifier is not stored by Amazon Rekognition.
      - BoundingBox (dict) –
        
        Bounding box around the detected person.
        
        Width (float) –
        
        Width of the bounding box as a ratio of the overall image width.
        
        Height (float) –
        
        Height of the bounding box as a ratio of the overall image height.
        
        Left (float) –
        
        Left coordinate of the bounding box as a ratio of overall image width.
        
        Top (float) –
        
        Top coordinate of the bounding box as a ratio of overall image height.
      - Face (dict) –
        
        Face details for the detected person.
        
        BoundingBox (dict) –
        
        Bounding box of the face. Default attribute.
        
        Width (float) –
        
        Width of the bounding box as a ratio of the overall image width.
        
        Height (float) –
        
        Height of the bounding box as a ratio of the overall image height.
        
        Left (float) –
        
        Left coordinate of the bounding box as a ratio of overall image width.
        
        Top (float) –
        
        Top coordinate of the bounding box as a ratio of overall image height.
        
        AgeRange (dict) –
        
        The estimated age range, in years, for the face. Low represents the lowest estimated age and High represents the highest estimated age.
        
        Low (integer) –
        
        The lowest estimated age.
        
        High (integer) –
        
        The highest estimated age.
        
        Smile (dict) –
        
        Indicates whether or not the face is smiling, and the confidence level in the determination.
        
        Value (boolean) –
        
        Boolean value that indicates whether the face is smiling or not.
        
        Confidence (float) –
        
        Level of confidence in the determination.
        
        Eyeglasses (dict) –
        
        Indicates whether or not the face is wearing eye glasses, and the confidence level in the determination.
        
        Value (boolean) –
        
        Boolean value that indicates whether the face is wearing eye glasses or not.
        
        Confidence (float) –
        
        Level of confidence in the determination.
        
        Sunglasses (dict) –
        
        Indicates whether or not the face is wearing sunglasses, and the confidence level in the determination.
        
        Value (boolean) –
        
        Boolean value that indicates whether the face is wearing sunglasses or not.
        
        Confidence (float) –
        
        Level of confidence in the determination.
        
        Gender (dict) –
        
        The predicted gender of a detected face.
        
        Value (string) –
        
        The predicted gender of the face.
        
        Confidence (float) –
        
        Level of confidence in the prediction.
        
        Beard (dict) –
        
        Indicates whether or not the face has a beard, and the confidence level in the determination.
        
        Value (boolean) –
        
        Boolean value that indicates whether the face has beard or not.
        
        Confidence (float) –
        
        Level of confidence in the determination.
        
        Mustache (dict) –
        
        Indicates whether or not the face has a mustache, and the confidence level in the determination.
        
        Value (boolean) –
        
        Boolean value that indicates whether the face has mustache or not.
        
        Confidence (float) –
        
        Level of confidence in the determination.
        
        EyesOpen (dict) –
        
        Indicates whether or not the eyes on the face are open, and the confidence level in the determination.
        
        Value (boolean) –
        
        Boolean value that indicates whether the eyes on the face are open.
        
        Confidence (float) –
        
        Level of confidence in the determination.
        
        MouthOpen (dict) –
        
        Indicates whether or not the mouth on the face is open, and the confidence level in the determination.
        
        Value (boolean) –
        
        Boolean value that indicates whether the mouth on the face is open or not.
        
        Confidence (float) –
        
        Level of confidence in the determination.
        
        Emotions (list) –
        
        The emotions that appear to be expressed on the face, and the confidence level in the determination. The API is only making a determination of the physical appearance of a person’s face. It is not a determination of the person’s internal emotional state and should not be used in such a way. For example, a person pretending to have a sad face might not be sad emotionally.
        
        (dict) –
        
        The emotions that appear to be expressed on the face, and the confidence level in the determination. The API is only making a determination of the physical appearance of a person’s face. It is not a determination of the person’s internal emotional state and should not be used in such a way. For example, a person pretending to have a sad face might not be sad emotionally.
        
        Type (string) –
        
        Type of emotion detected.
        
        Confidence (float) –
        
        Level of confidence in the determination.
        
        Landmarks (list) –
        
        Indicates the location of landmarks on the face. Default attribute.
        
        (dict) –
        
        Indicates the location of the landmark on the face.
        
        Type (string) –
        
        Type of landmark.
        
        X (float) –
        
        The x-coordinate of the landmark expressed as a ratio of the width of the image. The x-coordinate is measured from the left-side of the image. For example, if the image is 700 pixels wide and the x-coordinate of the landmark is at 350 pixels, this value is 0.5.
        
        Y (float) –
        
        The y-coordinate of the landmark expressed as a ratio of the height of the image. The y-coordinate is measured from the top of the image. For example, if the image height is 200 pixels and the y-coordinate of the landmark is at 50 pixels, this value is 0.25.
        
        Pose (dict) –
        
        Indicates the pose of the face as determined by its pitch, roll, and yaw. Default attribute.
        
        Roll (float) –
        
        Value representing the face rotation on the roll axis.
        
        Yaw (float) –
        
        Value representing the face rotation on the yaw axis.
        
        Pitch (float) –
        
        Value representing the face rotation on the pitch axis.
        
        Quality (dict) –
        
        Identifies image brightness and sharpness. Default attribute.
        
        Brightness (float) –
        
        Value representing brightness of the face. The service returns a value between 0 and 100 (inclusive). A higher value indicates a brighter face image.
        
        Sharpness (float) –
        
        Value representing sharpness of the face. The service returns a value between 0 and 100 (inclusive). A higher value indicates a sharper face image.
        
        Confidence (float) –
        
        Confidence level that the bounding box contains a face (and not a different object such as a tree). Default attribute.

Exceptions

Rekognition.Client.exceptions.AccessDeniedException
Rekognition.Client.exceptions.InternalServerError
Rekognition.Client.exceptions.InvalidParameterException
Rekognition.Client.exceptions.InvalidPaginationTokenException
Rekognition.Client.exceptions.ProvisionedThroughputExceededException
Rekognition.Client.exceptions.ResourceNotFoundException
Rekognition.Client.exceptions.ThrottlingException