Utilisation ListFaces avec un AWS SDK ou une CLI

Les exemples de code suivants illustrent comment utiliser ListFaces.

Pour plus d'informations, consultez Répertoriage de visages d'une collection.

.NET

SDK pour .NET

Note

Il y en a plus à ce sujet GitHub. Trouvez l’exemple complet et découvrez comment le configurer et l’exécuter dans le référentiel d’exemples de code AWS.

    using System;
    using System.Threading.Tasks;
    using Amazon.Rekognition;
    using Amazon.Rekognition.Model;

    /// <summary>
    /// Uses the Amazon Rekognition Service to retrieve the list of faces
    /// stored in a collection.
    /// </summary>
    public class ListFaces
    {
        public static async Task Main()
        {
            string collectionId = "MyCollection2";

            var rekognitionClient = new AmazonRekognitionClient();

            var listFacesResponse = new ListFacesResponse();
            Console.WriteLine($"Faces in collection {collectionId}");

            var listFacesRequest = new ListFacesRequest
            {
                CollectionId = collectionId,
                MaxResults = 1,
            };

            do
            {
                listFacesResponse = await rekognitionClient.ListFacesAsync(listFacesRequest);
                listFacesResponse.Faces.ForEach(face =>
                {
                    Console.WriteLine(face.FaceId);
                });

                listFacesRequest.NextToken = listFacesResponse.NextToken;
            }
            while (!string.IsNullOrEmpty(listFacesResponse.NextToken));
        }
    }

• Pour plus de détails sur l'API, reportez-vous ListFacesà la section Référence des AWS SDK pour .NET API.

CLI

AWS CLI

Pour répertorier les visages d'une collection

La list-faces commande suivante répertorie les visages de la collection spécifiée.

aws rekognition list-faces \
    --collection-id MyCollection

Sortie :

{
    "FaceModelVersion": "3.0",
    "Faces": [
        {
            "BoundingBox": {
                "Width": 0.5216310024261475,
                "Top": 0.3256250023841858,
                "Left": 0.13394300639629364,
                "Height": 0.3918749988079071
            },
            "FaceId": "0040279c-0178-436e-b70a-e61b074e96b0",
            "ExternalImageId": "image1.jpg",
            "Confidence": 100.0,
            "ImageId": "f976e487-3719-5e2d-be8b-ea2724c26991"
        },
        {
            "BoundingBox": {
                "Width": 0.5074880123138428,
                "Top": 0.3774999976158142,
                "Left": 0.18302799761295319,
                "Height": 0.3812499940395355
            },
            "FaceId": "086261e8-6deb-4bc0-ac73-ab22323cc38d",
            "ExternalImageId": "image2.jpg",
            "Confidence": 99.99930572509766,
            "ImageId": "ae1593b0-a8f6-5e24-a306-abf529e276fa"
        },
        {
            "BoundingBox": {
                "Width": 0.5574039816856384,
                "Top": 0.37187498807907104,
                "Left": 0.14559100568294525,
                "Height": 0.4181250035762787
            },
            "FaceId": "11c4bd3c-19c5-4eb8-aecc-24feb93a26e1",
            "ExternalImageId": "image3.jpg",
            "Confidence": 99.99960327148438,
            "ImageId": "80739b4d-883f-5b78-97cf-5124038e26b9"
        },
        {
            "BoundingBox": {
                "Width": 0.18562500178813934,
                "Top": 0.1618019938468933,
                "Left": 0.5575000047683716,
                "Height": 0.24770599603652954
            },
            "FaceId": "13692fe4-990a-4679-b14a-5ac23d135eab",
            "ExternalImageId": "image4.jpg",
            "Confidence": 99.99340057373047,
            "ImageId": "8df18239-9ad1-5acd-a46a-6581ff98f51b"
        },
        {
            "BoundingBox": {
                "Width": 0.5307819843292236,
                "Top": 0.2862499952316284,
                "Left": 0.1564060002565384,
                "Height": 0.3987500071525574
            },
            "FaceId": "2eb5f3fd-e2a9-4b1c-a89f-afa0a518fe06",
            "ExternalImageId": "image5.jpg",
            "Confidence": 99.99970245361328,
            "ImageId": "3c314792-197d-528d-bbb6-798ed012c150"
        },
        {
            "BoundingBox": {
                "Width": 0.5773710012435913,
                "Top": 0.34437501430511475,
                "Left": 0.12396000325679779,
                "Height": 0.4337500035762787
            },
            "FaceId": "57189455-42b0-4839-a86c-abda48b13174",
            "ExternalImageId": "image6.jpg",
            "Confidence": 100.0,
            "ImageId": "0aff2f37-e7a2-5dbc-a3a3-4ef6ec18eaa0"
        },
        {
            "BoundingBox": {
                "Width": 0.5349419713020325,
                "Top": 0.29124999046325684,
                "Left": 0.16389399766921997,
                "Height": 0.40187498927116394
            },
            "FaceId": "745f7509-b1fa-44e0-8b95-367b1359638a",
            "ExternalImageId": "image7.jpg",
            "Confidence": 99.99979400634766,
            "ImageId": "67a34327-48d1-5179-b042-01e52ccfeada"
        },
        {
            "BoundingBox": {
                "Width": 0.41499999165534973,
                "Top": 0.09187500178813934,
                "Left": 0.28083300590515137,
                "Height": 0.3112500011920929
            },
            "FaceId": "8d3cfc70-4ba8-4b36-9644-90fba29c2dac",
            "ExternalImageId": "image8.jpg",
            "Confidence": 99.99769592285156,
            "ImageId": "a294da46-2cb1-5cc4-9045-61d7ca567662"
        },
        {
            "BoundingBox": {
                "Width": 0.48166701197624207,
                "Top": 0.20999999344348907,
                "Left": 0.21250000596046448,
                "Height": 0.36125001311302185
            },
            "FaceId": "bd4ceb4d-9acc-4ab7-8ef8-1c2d2ba0a66a",
            "ExternalImageId": "image9.jpg",
            "Confidence": 99.99949645996094,
            "ImageId": "5e1a7588-e5a0-5ee3-bd00-c642518dfe3a"
        },
        {
            "BoundingBox": {
                "Width": 0.18562500178813934,
                "Top": 0.1618019938468933,
                "Left": 0.5575000047683716,
                "Height": 0.24770599603652954
            },
            "FaceId": "ce7ed422-2132-4a11-ab14-06c5c410f29f",
            "ExternalImageId": "image10.jpg",
            "Confidence": 99.99340057373047,
            "ImageId": "8d67061e-90d2-598f-9fbd-29c8497039c0"
        }
    ]
}

Pour plus d'informations, consultez la section Listing Faces in a Collection dans le manuel Amazon Rekognition Developer Guide.

• Pour plus de détails sur l'API, reportez-vous ListFacesà la section Référence des AWS CLI commandes.

Java

SDK pour Java 2.x

Note

Il y en a plus à ce sujet GitHub. Trouvez l’exemple complet et découvrez comment le configurer et l’exécuter dans le référentiel d’exemples de code AWS.

import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.rekognition.RekognitionClient;
import software.amazon.awssdk.services.rekognition.model.Face;
import software.amazon.awssdk.services.rekognition.model.ListFacesRequest;
import software.amazon.awssdk.services.rekognition.model.ListFacesResponse;
import software.amazon.awssdk.services.rekognition.model.RekognitionException;
import java.util.List;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class ListFacesInCollection {
    public static void main(String[] args) {
        final String usage = """

                Usage:    <collectionId>

                Where:
                   collectionId - The name of the collection.\s
                """;

        if (args.length < 1) {
            System.out.println(usage);
            System.exit(1);
        }

        String collectionId = args[0];
        Region region = Region.US_EAST_1;
        RekognitionClient rekClient = RekognitionClient.builder()
                .region(region)
                .build();

        System.out.println("Faces in collection " + collectionId);
        listFacesCollection(rekClient, collectionId);
        rekClient.close();
    }

    public static void listFacesCollection(RekognitionClient rekClient, String collectionId) {
        try {
            ListFacesRequest facesRequest = ListFacesRequest.builder()
                    .collectionId(collectionId)
                    .maxResults(10)
                    .build();

            ListFacesResponse facesResponse = rekClient.listFaces(facesRequest);
            List<Face> faces = facesResponse.faces();
            for (Face face : faces) {
                System.out.println("Confidence level there is a face: " + face.confidence());
                System.out.println("The face Id value is " + face.faceId());
            }

        } catch (RekognitionException e) {
            System.out.println(e.getMessage());
            System.exit(1);
        }
    }
}

• Pour plus de détails sur l'API, reportez-vous ListFacesà la section Référence des AWS SDK for Java 2.x API.

Kotlin

SDK pour Kotlin

Note

Il y en a plus à ce sujet GitHub. Trouvez l’exemple complet et découvrez comment le configurer et l’exécuter dans le référentiel d’exemples de code AWS.

suspend fun listFacesCollection(collectionIdVal: String?) {
    val request =
        ListFacesRequest {
            collectionId = collectionIdVal
            maxResults = 10
        }

    RekognitionClient { region = "us-east-1" }.use { rekClient ->
        val response = rekClient.listFaces(request)
        response.faces?.forEach { face ->
            println("Confidence level there is a face: ${face.confidence}")
            println("The face Id value is ${face.faceId}")
        }
    }
}

• Pour plus de détails sur l'API, reportez-vous ListFacesà la section AWS SDK pour la référence de l'API Kotlin.

Python

SDK pour Python (Boto3)

Note

Il y en a plus à ce sujet GitHub. Trouvez l’exemple complet et découvrez comment le configurer et l’exécuter dans le référentiel d’exemples de code AWS.

class RekognitionCollection:
    """
    Encapsulates an Amazon Rekognition collection. This class is a thin wrapper
    around parts of the Boto3 Amazon Rekognition API.
    """

    def __init__(self, collection, rekognition_client):
        """
        Initializes a collection object.

        :param collection: Collection data in the format returned by a call to
                           create_collection.
        :param rekognition_client: A Boto3 Rekognition client.
        """
        self.collection_id = collection["CollectionId"]
        self.collection_arn, self.face_count, self.created = self._unpack_collection(
            collection
        )
        self.rekognition_client = rekognition_client

    @staticmethod
    def _unpack_collection(collection):
        """
        Unpacks optional parts of a collection that can be returned by
        describe_collection.

        :param collection: The collection data.
        :return: A tuple of the data in the collection.
        """
        return (
            collection.get("CollectionArn"),
            collection.get("FaceCount", 0),
            collection.get("CreationTimestamp"),
        )


    def list_faces(self, max_results):
        """
        Lists the faces currently indexed in the collection.

        :param max_results: The maximum number of faces to return.
        :return: The list of faces in the collection.
        """
        try:
            response = self.rekognition_client.list_faces(
                CollectionId=self.collection_id, MaxResults=max_results
            )
            faces = [RekognitionFace(face) for face in response["Faces"]]
            logger.info(
                "Found %s faces in collection %s.", len(faces), self.collection_id
            )
        except ClientError:
            logger.exception(
                "Couldn't list faces in collection %s.", self.collection_id
            )
            raise
        else:
            return faces

• Pour plus de détails sur l'API, consultez ListFacesle AWS manuel de référence de l'API SDK for Python (Boto3).

Pour obtenir la liste complète des guides de développement du AWS SDK et des exemples de code, consultezUtilisation de la Rekognition avec un SDK AWS. Cette rubrique comprend également des informations sur le démarrage et sur les versions précédentes de SDK.