AWS SDK Version 3 for .NET
API Reference

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Associates one or more faces with an existing UserID. Takes an array of FaceIds. Each FaceId that are present in the FaceIds list is associated with the provided UserID. The maximum number of total FaceIds per UserID is 100.

The UserMatchThreshold parameter specifies the minimum user match confidence required for the face to be associated with a UserID that has at least one FaceID already associated. This ensures that the FaceIds are associated with the right UserID. The value ranges from 0-100 and default value is 75.

If successful, an array of AssociatedFace objects containing the associated FaceIds is returned. If a given face is already associated with the given UserID, it will be ignored and will not be returned in the response. If a given face is already associated to a different UserID, isn't found in the collection, doesn’t meet the UserMatchThreshold, or there are already 100 faces associated with the UserID, it will be returned as part of an array of UnsuccessfulFaceAssociations.

The UserStatus reflects the status of an operation which updates a UserID representation with a list of given faces. The UserStatus can be:

Note:

This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginAssociateFaces and EndAssociateFaces.

Namespace: Amazon.Rekognition
Assembly: AWSSDK.Rekognition.dll
Version: 3.x.y.z

Syntax

C#
public virtual Task<AssociateFacesResponse> AssociateFacesAsync(
         AssociateFacesRequest request,
         CancellationToken cancellationToken
)

Parameters

request
Type: Amazon.Rekognition.Model.AssociateFacesRequest

Container for the necessary parameters to execute the AssociateFaces service method.

cancellationToken
Type: System.Threading.CancellationToken

A cancellation token that can be used by other objects or threads to receive notice of cancellation.

Return Value


The response from the AssociateFaces service method, as returned by Rekognition.

Exceptions

ExceptionCondition
AccessDeniedException You are not authorized to perform the action.
ConflictException A User with the same Id already exists within the collection, or the update or deletion of the User caused an inconsistent state. **
IdempotentParameterMismatchException A ClientRequestToken input parameter was reused with an operation, but at least one of the other input parameters is different from the previous call to the operation.
InternalServerErrorException Amazon Rekognition experienced a service issue. Try your call again.
InvalidParameterException Input parameter violated a constraint. Validate your parameter before calling the API operation again.
ProvisionedThroughputExceededException The number of requests exceeded your throughput limit. If you want to increase this limit, contact Amazon Rekognition.
ResourceNotFoundException The resource specified in the request cannot be found.
ServiceQuotaExceededException The size of the collection exceeds the allowed limit. For more information, see Guidelines and quotas in Amazon Rekognition in the Amazon Rekognition Developer Guide.
ThrottlingException Amazon Rekognition is temporarily unable to process the request. Try your call again.

Version Information

.NET:
Supported in: 8.0 and newer, Core 3.1

.NET Standard:
Supported in: 2.0

.NET Framework:
Supported in: 4.5 and newer

See Also