Face List Operations - Get Large Face Lists

Service:

Azure AI Services

API Version:

v1.2-preview.1

List Large Face Lists' information of largeFaceListId, name, userData and recognitionModel.
To get face information inside largeFaceList use "Get Large Face List Face".

Large Face Lists are stored in alphabetical order of largeFaceListId.

• • "start" parameter (string, optional) specifies an ID value from which returned entries will have larger IDs based on string comparison. Setting "start" to an empty value indicates that entries should be returned starting from the first item.
  • "top" parameter (int, optional) determines the maximum number of entries to be returned, with a limit of up to 1000 entries per call. To retrieve additional entries beyond this limit, specify "start" with the personId of the last entry returned in the current call.

Tip

• For example, there are total 5 items with their IDs: "itemId1", ..., "itemId5".
  • "start=&top=" will return all 5 items.
  • "start=&top=2" will return "itemId1", "itemId2".
  • "start=itemId2&top=3" will return "itemId3", "itemId4", "itemId5".

GET {endpoint}/face/{apiVersion}/largefacelists

With optional parameters:

GET {endpoint}/face/{apiVersion}/largefacelists?start={start}&top={top}&returnRecognitionModel={returnRecognitionModel}

URI Parameters

Name	In	Required	Type	Description
apiVersion	path	True	string	API Version
endpoint	path	True	string uri	Supported Cognitive Services endpoints (protocol and hostname, for example: https://{resource-name}.cognitiveservices.azure.com).
returnRecognitionModel	query		boolean	Return 'recognitionModel' or not. The default value is false.
start	query		string	List resources greater than the "start". It contains no more than 64 characters. Default is empty.
top	query		integer int32	The number of items to list, ranging in [1, 1000]. Default is 1000.

Responses

Name	Type	Description
200 OK	LargeFaceList[]	A successful call returns an array of Large Face Lists and their information (largeFaceListId, name and userData).
Other Status Codes	FaceErrorResponse	An unexpected error response. Headers x-ms-error-code: string

Security

Ocp-Apim-Subscription-Key

The secret key for your Azure AI Face subscription.

Type: apiKey
In: header

AADToken

The Azure Active Directory OAuth2 Flow

Type: oauth2
Flow: accessCode
Authorization URL: https://api.example.com/oauth2/authorize
Token URL: https://api.example.com/oauth2/token

Scopes

Name	Description
https://cognitiveservices.azure.com/.default

Examples

Get LargeFaceLists

Sample request

HTTP

GET {endpoint}/face/v1.2-preview.1/largefacelists?start=my_list_id&top=20&returnRecognitionModel=True

Sample response

Status code:

200

[
  {
    "name": "your_large_face_list_name",
    "userData": "your_user_data",
    "recognitionModel": "recognition_01",
    "largeFaceListId": "your_large_face_list_id"
  }
]

Definitions

Name	Description
FaceError	The error object. For comprehensive details on error codes and messages returned by the Face Service, please refer to the following link: https://aka.ms/face-error-codes-and-messages.
FaceErrorResponse	A response containing error details.
LargeFaceList	Large face list is a list of faces, up to 1,000,000 faces.
RecognitionModel	The recognition model for the face.

FaceError

The error object. For comprehensive details on error codes and messages returned by the Face Service, please refer to the following link: https://aka.ms/face-error-codes-and-messages.

Name	Type	Description
code	string	One of a server-defined set of error codes.
message	string	A human-readable representation of the error.

FaceErrorResponse

A response containing error details.

Name	Type	Description
error	FaceError	The error object.

LargeFaceList

Large face list is a list of faces, up to 1,000,000 faces.

Name	Type	Description
largeFaceListId	string	Valid character is letter in lower case or digit or '-' or '_', maximum length is 64.
name	string	User defined name, maximum length is 128.
recognitionModel	RecognitionModel	Name of recognition model. Recognition model is used when the face features are extracted and associated with detected faceIds.
userData	string	Optional user defined data. Length should not exceed 16K.

RecognitionModel

The recognition model for the face.

Name	Type	Description
recognition_01	string	The default recognition model for "Detect". All those faceIds created before 2019 March are bonded with this recognition model.
recognition_02	string	Recognition model released in 2019 March.
recognition_03	string	Recognition model released in 2020 May.
recognition_04	string	Recognition model released in 2021 February. It's recommended to use this recognition model for better recognition accuracy.