Verwenden Sie ListFaces mit einem AWS SDKoder CLI

Die folgenden Codebeispiele zeigen die VerwendungListFaces.

Weitere Informationen finden Sie unter Gesichter in einer Sammlung auflisten.

.NET

AWS SDK for .NET

Anmerkung

Es gibt noch mehr dazu GitHub. Das vollständige Beispiel und Informationen zur Einrichtung und Ausführung finden Sie in AWS Repository mit Codebeispielen.

    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));
        }
    }

• APIEinzelheiten finden Sie ListFacesunter AWS SDK for .NET APIReferenz.

CLI

AWS CLI

Um die Gesichter in einer Sammlung aufzulisten

Der folgende list-faces Befehl listet die Gesichter in der angegebenen Sammlung auf.

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

Ausgabe:

{
    "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"
        }
    ]
}

Weitere Informationen finden Sie unter Gesichter in einer Sammlung auflisten im Amazon Rekognition Developer Guide.

• APIEinzelheiten finden Sie unter ListFacesAWS CLI Befehlsreferenz.

Java

SDKfür Java 2.x

Anmerkung

Es gibt noch mehr dazu. GitHub Das vollständige Beispiel und Informationen zur Einrichtung und Ausführung finden Sie in AWS Repository mit Codebeispielen.

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);
        }
    }
}

• APIEinzelheiten finden Sie ListFacesunter AWS SDK for Java 2.x APIReferenz.

Kotlin

SDKfür Kotlin

Anmerkung

Es gibt noch mehr dazu. GitHub Das vollständige Beispiel und Informationen zur Einrichtung und Ausführung finden Sie in AWS Repository mit Codebeispielen.

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}")
        }
    }
}

• APIEinzelheiten finden Sie ListFacesunter AWS SDKals API Kotlin-Referenz.

Python

SDKfür Python (Boto3)

Anmerkung

Es gibt noch mehr dazu. GitHub Das vollständige Beispiel und Informationen zur Einrichtung und Ausführung finden Sie in AWS Repository mit Codebeispielen.

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

• APIEinzelheiten finden Sie ListFacesunter AWS SDKfür Python (Boto3) API -Referenz.

Für eine vollständige Liste von AWS SDKEntwicklerhandbücher und Codebeispiele finden Sie unterRekognition mit einem AWS SDK. Dieses Thema enthält auch Informationen zu den ersten Schritten und Details zu früheren SDK Versionen.