Rilevamento di volti in un'immagine

Per rilevare volti in un'immagine

1. Se non lo hai già fatto:

   1. Crea o aggiorna un utente con le autorizzazioni AmazonRekognitionFullAccess e AmazonS3ReadOnlyAccess. Per ulteriori informazioni, consulta Fase 1: impostazione di un account AWS e creazione di un utente.

   2. Installa e configura il e il. AWS CLI AWS SDKs Per ulteriori informazioni, consulta Passaggio 2: configura AWS CLI e AWS SDKs.

2. Carica un'immagine (contenente uno o più volti) nel bucket S3.

   Per le istruzioni, consulta Caricamento di oggetti in Amazon S3 nella Guida per l'utente di Amazon Simple Storage Service.

3. Utilizza i seguenti esempi per richiamare DetectFaces.

   Java

   In questo esempio viene visualizzato l'intervallo di età stimato per i volti rilevati e sono elencati i JSON per tutti gli attributi facciali rilevati. Modifica il valore di photo nel nome del file immagine. Modifica il valore di amzn-s3-demo-bucket nel bucket Amazon S3 dove è archiviata l'immagine.

   //Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
   //PDX-License-Identifier: MIT-0 (For details, see https://github.com/awsdocs/amazon-rekognition-developer-guide/blob/master/LICENSE-SAMPLECODE.)
   
   package aws.example.rekognition.image;
   
   import com.amazonaws.services.rekognition.AmazonRekognition;
   import com.amazonaws.services.rekognition.AmazonRekognitionClientBuilder;
   import com.amazonaws.services.rekognition.model.AmazonRekognitionException;
   import com.amazonaws.services.rekognition.model.Image;
   import com.amazonaws.services.rekognition.model.S3Object;
   import com.amazonaws.services.rekognition.model.AgeRange;
   import com.amazonaws.services.rekognition.model.Attribute;
   import com.amazonaws.services.rekognition.model.DetectFacesRequest;
   import com.amazonaws.services.rekognition.model.DetectFacesResult;
   import com.amazonaws.services.rekognition.model.FaceDetail;
   import com.fasterxml.jackson.databind.ObjectMapper;
   import java.util.List;
   
   
   public class DetectFaces {
      
      
      public static void main(String[] args) throws Exception {
   
         String photo = "input.jpg";
         String bucket = "bucket";
   
         AmazonRekognition rekognitionClient = AmazonRekognitionClientBuilder.defaultClient();
   
   
         DetectFacesRequest request = new DetectFacesRequest()
            .withImage(new Image()
               .withS3Object(new S3Object()
                  .withName(photo)
                  .withBucket(bucket)))
            .withAttributes(Attribute.ALL);
         // Replace Attribute.ALL with Attribute.DEFAULT to get default values.
   
         try {
            DetectFacesResult result = rekognitionClient.detectFaces(request);
            List < FaceDetail > faceDetails = result.getFaceDetails();
   
            for (FaceDetail face: faceDetails) {
               if (request.getAttributes().contains("ALL")) {
                  AgeRange ageRange = face.getAgeRange();
                  System.out.println("The detected face is estimated to be between "
                     + ageRange.getLow().toString() + " and " + ageRange.getHigh().toString()
                     + " years old.");
                  System.out.println("Here's the complete set of attributes:");
               } else { // non-default attributes have null values.
                  System.out.println("Here's the default set of attributes:");
               }
   
               ObjectMapper objectMapper = new ObjectMapper();
               System.out.println(objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(face));
            }
   
         } catch (AmazonRekognitionException e) {
            e.printStackTrace();
         }
   
      }
   
   }
   
   

   Java V2

   Questo codice è tratto dal GitHub repository degli esempi di AWS Documentation SDK. Guarda l'esempio completo qui.

   import java.util.List;
   
   //snippet-start:[rekognition.java2.detect_labels.import]
   import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider;
   import software.amazon.awssdk.regions.Region;
   import software.amazon.awssdk.services.rekognition.RekognitionClient;
   import software.amazon.awssdk.services.rekognition.model.RekognitionException;
   import software.amazon.awssdk.services.rekognition.model.S3Object;
   import software.amazon.awssdk.services.rekognition.model.DetectFacesRequest;
   import software.amazon.awssdk.services.rekognition.model.DetectFacesResponse;
   import software.amazon.awssdk.services.rekognition.model.Image;
   import software.amazon.awssdk.services.rekognition.model.Attribute;
   import software.amazon.awssdk.services.rekognition.model.FaceDetail;
   import software.amazon.awssdk.services.rekognition.model.AgeRange;
   
   //snippet-end:[rekognition.java2.detect_labels.import]
   
   public class DetectFaces {
   
       public static void main(String[] args) {
           final String usage = "\n" +
               "Usage: " +
               "   <bucket> <image>\n\n" +
               "Where:\n" +
               "   bucket - The name of the Amazon S3 bucket that contains the image (for example, ,amzn-s3-demo-bucket)." +
               "   image - The name of the image located in the Amazon S3 bucket (for example, Lake.png). \n\n";
   
           if (args.length != 2) {
               System.out.println(usage);
               System.exit(1);
           }
   
           String bucket = args[0];
           String image = args[1];
           Region region = Region.US_WEST_2;
           RekognitionClient rekClient = RekognitionClient.builder()
               .region(region)
               .credentialsProvider(ProfileCredentialsProvider.create("profile-name"))
               .build();
   
           getLabelsfromImage(rekClient, bucket, image);
           rekClient.close();
       }
   
       // snippet-start:[rekognition.java2.detect_labels_s3.main]
       public static void getLabelsfromImage(RekognitionClient rekClient, String bucket, String image) {
   
           try {
               S3Object s3Object = S3Object.builder()
                   .bucket(bucket)
                   .name(image)
                   .build() ;
   
               Image myImage = Image.builder()
                   .s3Object(s3Object)
                   .build();
   
               DetectFacesRequest facesRequest = DetectFacesRequest.builder()
                       .attributes(Attribute.ALL)
                       .image(myImage)
                       .build();
   
                   DetectFacesResponse facesResponse = rekClient.detectFaces(facesRequest);
                   List<FaceDetail> faceDetails = facesResponse.faceDetails();
                   for (FaceDetail face : faceDetails) {
                       AgeRange ageRange = face.ageRange();
                       System.out.println("The detected face is estimated to be between "
                                   + ageRange.low().toString() + " and " + ageRange.high().toString()
                                   + " years old.");
   
                       System.out.println("There is a smile : "+face.smile().value().toString());
                   }
   
           } catch (RekognitionException e) {
               System.out.println(e.getMessage());
               System.exit(1);
           }
       }
    // snippet-end:[rekognition.java2.detect_labels.main]
   }

   AWS CLI

   Questo esempio visualizza l'output JSON dell'operazione. detect-faces AWS CLI Sostituisci file con il nome di un file immagine. Sostituisci amzn-s3-demo-bucket con il nome del bucket Amazon S3 che contiene il file immagine.

   aws rekognition detect-faces --image "{"S3Object":{"Bucket":"amzn-s3-demo-bucket,"Name":"image-name"}}"\
                                --attributes "ALL" --profile profile-name --region region-name 
                               

   Se accedi alla CLI da un dispositivo Windows, usa le virgolette doppie anziché le virgolette singole ed evita le virgolette doppie interne tramite barra rovesciata (ovvero, \) per risolvere eventuali errori del parser che potresti riscontrare. Per un esempio, consulta quanto segue:

   
   aws rekognition detect-faces --image "{\"S3Object\":{\"Bucket\":\"amzn-s3-demo-bucket\",\"Name\":\"image-name\"}}" --attributes "ALL" 
   --profile profile-name --region region-name 
                               

   Python

   In questo esempio viene visualizzato l'intervallo di età stimato e altri attributi per i volti rilevati e sono elencati i JSON per tutti gli attributi facciali rilevati. Modifica il valore di photo nel nome del file immagine. Modifica il valore di amzn-s3-demo-bucket nel bucket Amazon S3 dove è archiviata l'immagine. Sostituisci il valore di profile_name nella riga che crea la sessione di Rekognition con il nome del tuo profilo di sviluppatore.

   import boto3
   import json
   
   def detect_faces(photo, bucket, region):
       
       session = boto3.Session(profile_name='profile-name',
                               region_name=region)
       client = session.client('rekognition', region_name=region)
   
       response = client.detect_faces(Image={'S3Object':{'Bucket':bucket,'Name':photo}},
                                      Attributes=['ALL'])
   
       print('Detected faces for ' + photo)
       for faceDetail in response['FaceDetails']:
           print('The detected face is between ' + str(faceDetail['AgeRange']['Low'])
                 + ' and ' + str(faceDetail['AgeRange']['High']) + ' years old')
   
           print('Here are the other attributes:')
           print(json.dumps(faceDetail, indent=4, sort_keys=True))
   
           # Access predictions for individual face details and print them
           print("Gender: " + str(faceDetail['Gender']))
           print("Smile: " + str(faceDetail['Smile']))
           print("Eyeglasses: " + str(faceDetail['Eyeglasses']))
           print("Face Occluded: " + str(faceDetail['FaceOccluded']))
           print("Emotions: " + str(faceDetail['Emotions'][0]))
   
       return len(response['FaceDetails'])
       
   def main():
       photo='photo'
       bucket='amzn-s3-demo-bucket'
       region='region'
       face_count=detect_faces(photo, bucket, region)
       print("Faces detected: " + str(face_count))
   
   if __name__ == "__main__":
       main()
   

   .NET

   In questo esempio viene visualizzato l'intervallo di età stimato per i volti rilevati e sono elencati i JSON per tutti gli attributi facciali rilevati. Modifica il valore di photo nel nome del file immagine. Modifica il valore di amzn-s3-demo-bucket nel bucket Amazon S3 dove è archiviata l'immagine.

   //Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
   //PDX-License-Identifier: MIT-0 (For details, see https://github.com/awsdocs/amazon-rekognition-developer-guide/blob/master/LICENSE-SAMPLECODE.)
   
   using System;
   using System.Collections.Generic;
   using Amazon.Rekognition;
   using Amazon.Rekognition.Model;
   
   public class DetectFaces
   {
       public static void Example()
       {
           String photo = "input.jpg";
           String bucket = "amzn-s3-demo-bucket";
   
           AmazonRekognitionClient rekognitionClient = new AmazonRekognitionClient();
   
           DetectFacesRequest detectFacesRequest = new DetectFacesRequest()
           {
               Image = new Image()
               {
                   S3Object = new S3Object()
                   {
                       Name = photo,
                       Bucket = bucket
                   },
               },
               // Attributes can be "ALL" or "DEFAULT". 
               // "DEFAULT": BoundingBox, Confidence, Landmarks, Pose, and Quality.
               // "ALL": See https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/Rekognition/TFaceDetail.html
               Attributes = new List<String>() { "ALL" }
           };
   
           try
           {
               DetectFacesResponse detectFacesResponse = rekognitionClient.DetectFaces(detectFacesRequest);
               bool hasAll = detectFacesRequest.Attributes.Contains("ALL");
               foreach(FaceDetail face in detectFacesResponse.FaceDetails)
               {
                   Console.WriteLine("BoundingBox: top={0} left={1} width={2} height={3}", face.BoundingBox.Left,
                       face.BoundingBox.Top, face.BoundingBox.Width, face.BoundingBox.Height);
                   Console.WriteLine("Confidence: {0}\nLandmarks: {1}\nPose: pitch={2} roll={3} yaw={4}\nQuality: {5}",
                       face.Confidence, face.Landmarks.Count, face.Pose.Pitch,
                       face.Pose.Roll, face.Pose.Yaw, face.Quality);
                   if (hasAll)
                       Console.WriteLine("The detected face is estimated to be between " +
                           face.AgeRange.Low + " and " + face.AgeRange.High + " years old.");
               }
           }
           catch (Exception e)
           {
               Console.WriteLine(e.Message);
           }
       }
   }

   Ruby

   Questo esempio mostra l'intervallo di età stimato per i volti rilevati ed elenca vari attributi facciali. Modifica il valore di photo nel nome del file immagine. Modifica il valore di amzn-s3-demo-bucket nel bucket Amazon S3 dove è archiviata l'immagine.

   
   
      # Add to your Gemfile
      # gem 'aws-sdk-rekognition'
      require 'aws-sdk-rekognition'
      credentials = Aws::Credentials.new(
         ENV['AWS_ACCESS_KEY_ID'],
         ENV['AWS_SECRET_ACCESS_KEY']
      )
      bucket = 'bucket' # the bucketname without s3://
      photo  = 'input.jpg'# the name of file
      client   = Aws::Rekognition::Client.new credentials: credentials
      attrs = {
        image: {
          s3_object: {
            bucket: bucket,
            name: photo
          },
        },
        attributes: ['ALL']
      }
      response = client.detect_faces attrs
      puts "Detected faces for: #{photo}"
      response.face_details.each do |face_detail|
        low  = face_detail.age_range.low
        high = face_detail.age_range.high
        puts "The detected face is between: #{low} and #{high} years old"
        puts "All other attributes:"
        puts "  bounding_box.width:     #{face_detail.bounding_box.width}"
        puts "  bounding_box.height:    #{face_detail.bounding_box.height}"
        puts "  bounding_box.left:      #{face_detail.bounding_box.left}"
        puts "  bounding_box.top:       #{face_detail.bounding_box.top}"
        puts "  age.range.low:          #{face_detail.age_range.low}"
        puts "  age.range.high:         #{face_detail.age_range.high}"
        puts "  smile.value:            #{face_detail.smile.value}"
        puts "  smile.confidence:       #{face_detail.smile.confidence}"
        puts "  eyeglasses.value:       #{face_detail.eyeglasses.value}"
        puts "  eyeglasses.confidence:  #{face_detail.eyeglasses.confidence}"
        puts "  sunglasses.value:       #{face_detail.sunglasses.value}"
        puts "  sunglasses.confidence:  #{face_detail.sunglasses.confidence}"
        puts "  gender.value:           #{face_detail.gender.value}"
        puts "  gender.confidence:      #{face_detail.gender.confidence}"
        puts "  beard.value:            #{face_detail.beard.value}"
        puts "  beard.confidence:       #{face_detail.beard.confidence}"
        puts "  mustache.value:         #{face_detail.mustache.value}"
        puts "  mustache.confidence:    #{face_detail.mustache.confidence}"
        puts "  eyes_open.value:        #{face_detail.eyes_open.value}"
        puts "  eyes_open.confidence:   #{face_detail.eyes_open.confidence}"
        puts "  mout_open.value:        #{face_detail.mouth_open.value}"
        puts "  mout_open.confidence:   #{face_detail.mouth_open.confidence}"
        puts "  emotions[0].type:       #{face_detail.emotions[0].type}"
        puts "  emotions[0].confidence: #{face_detail.emotions[0].confidence}"
        puts "  landmarks[0].type:      #{face_detail.landmarks[0].type}"
        puts "  landmarks[0].x:         #{face_detail.landmarks[0].x}"
        puts "  landmarks[0].y:         #{face_detail.landmarks[0].y}"
        puts "  pose.roll:              #{face_detail.pose.roll}"
        puts "  pose.yaw:               #{face_detail.pose.yaw}"
        puts "  pose.pitch:             #{face_detail.pose.pitch}"
        puts "  quality.brightness:     #{face_detail.quality.brightness}"
        puts "  quality.sharpness:      #{face_detail.quality.sharpness}"
        puts "  confidence:             #{face_detail.confidence}"
        puts "------------"
        puts ""
      end

   Node.js

   Questo esempio mostra l'intervallo di età stimato per i volti rilevati ed elenca vari attributi facciali. Modifica il valore di photo nel nome del file immagine. Modifica il valore di amzn-s3-demo-bucket nel bucket Amazon S3 dove è archiviata l'immagine.

   Sostituisci il valore di profile_name nella riga che crea la sessione di Rekognition con il nome del tuo profilo di sviluppatore.

   Se si utilizzano TypeScript definizioni, potrebbe essere necessario utilizzare import AWS from 'aws-sdk' invece diconst AWS = require('aws-sdk'), per eseguire il programma con Node.js. Puoi consultare l'AWS SDK per Javascript per maggiori dettagli. A seconda di come sono state impostate le configurazioni, potrebbe essere necessario specificare anche la regione con AWS.config.update({region:region});.

   
   
   // Load the SDK
   var AWS = require('aws-sdk');
   const bucket = 'bucket-name' // the bucketname without s3://
   const photo  = 'photo-name' // the name of file
   
   var credentials = new AWS.SharedIniFileCredentials({profile: 'profile-name'});
   AWS.config.credentials = credentials;
   AWS.config.update({region:'region-name'});
   
   const client = new AWS.Rekognition();
   const params = {
     Image: {
       S3Object: {
         Bucket: bucket,
         Name: photo
       },
     },
     Attributes: ['ALL']
   }
   
   client.detectFaces(params, function(err, response) {
       if (err) {
         console.log(err, err.stack); // an error occurred
       } else {
         console.log(`Detected faces for: ${photo}`)
         response.FaceDetails.forEach(data => {
           let low  = data.AgeRange.Low
           let high = data.AgeRange.High
           console.log(`The detected face is between: ${low} and ${high} years old`)
           console.log("All other attributes:")
           console.log(`  BoundingBox.Width:      ${data.BoundingBox.Width}`)
           console.log(`  BoundingBox.Height:     ${data.BoundingBox.Height}`)
           console.log(`  BoundingBox.Left:       ${data.BoundingBox.Left}`)
           console.log(`  BoundingBox.Top:        ${data.BoundingBox.Top}`)
           console.log(`  Age.Range.Low:          ${data.AgeRange.Low}`)
           console.log(`  Age.Range.High:         ${data.AgeRange.High}`)
           console.log(`  Smile.Value:            ${data.Smile.Value}`)
           console.log(`  Smile.Confidence:       ${data.Smile.Confidence}`)
           console.log(`  Eyeglasses.Value:       ${data.Eyeglasses.Value}`)
           console.log(`  Eyeglasses.Confidence:  ${data.Eyeglasses.Confidence}`)
           console.log(`  Sunglasses.Value:       ${data.Sunglasses.Value}`)
           console.log(`  Sunglasses.Confidence:  ${data.Sunglasses.Confidence}`)
           console.log(`  Gender.Value:           ${data.Gender.Value}`)
           console.log(`  Gender.Confidence:      ${data.Gender.Confidence}`)
           console.log(`  Beard.Value:            ${data.Beard.Value}`)
           console.log(`  Beard.Confidence:       ${data.Beard.Confidence}`)
           console.log(`  Mustache.Value:         ${data.Mustache.Value}`)
           console.log(`  Mustache.Confidence:    ${data.Mustache.Confidence}`)
           console.log(`  EyesOpen.Value:         ${data.EyesOpen.Value}`)
           console.log(`  EyesOpen.Confidence:    ${data.EyesOpen.Confidence}`)
           console.log(`  MouthOpen.Value:        ${data.MouthOpen.Value}`)
           console.log(`  MouthOpen.Confidence:   ${data.MouthOpen.Confidence}`)
           console.log(`  Emotions[0].Type:       ${data.Emotions[0].Type}`)
           console.log(`  Emotions[0].Confidence: ${data.Emotions[0].Confidence}`)
           console.log(`  Landmarks[0].Type:      ${data.Landmarks[0].Type}`)
           console.log(`  Landmarks[0].X:         ${data.Landmarks[0].X}`)
           console.log(`  Landmarks[0].Y:         ${data.Landmarks[0].Y}`)
           console.log(`  Pose.Roll:              ${data.Pose.Roll}`)
           console.log(`  Pose.Yaw:               ${data.Pose.Yaw}`)
           console.log(`  Pose.Pitch:             ${data.Pose.Pitch}`)
           console.log(`  Quality.Brightness:     ${data.Quality.Brightness}`)
           console.log(`  Quality.Sharpness:      ${data.Quality.Sharpness}`)
           console.log(`  Confidence:             ${data.Confidence}`)
           console.log("------------")
           console.log("")
         }) // for response.faceDetails
       } // if
     });

   anchoranchoranchoranchoranchoranchoranchor
   • Java
   • Java V2
   • AWS CLI
   • Python
   • .NET
   • Ruby
   • Node.js

   In questo esempio viene visualizzato l'intervallo di età stimato per i volti rilevati e sono elencati i JSON per tutti gli attributi facciali rilevati. Modifica il valore di photo nel nome del file immagine. Modifica il valore di amzn-s3-demo-bucket nel bucket Amazon S3 dove è archiviata l'immagine.

   //Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
   //PDX-License-Identifier: MIT-0 (For details, see https://github.com/awsdocs/amazon-rekognition-developer-guide/blob/master/LICENSE-SAMPLECODE.)
   
   package aws.example.rekognition.image;
   
   import com.amazonaws.services.rekognition.AmazonRekognition;
   import com.amazonaws.services.rekognition.AmazonRekognitionClientBuilder;
   import com.amazonaws.services.rekognition.model.AmazonRekognitionException;
   import com.amazonaws.services.rekognition.model.Image;
   import com.amazonaws.services.rekognition.model.S3Object;
   import com.amazonaws.services.rekognition.model.AgeRange;
   import com.amazonaws.services.rekognition.model.Attribute;
   import com.amazonaws.services.rekognition.model.DetectFacesRequest;
   import com.amazonaws.services.rekognition.model.DetectFacesResult;
   import com.amazonaws.services.rekognition.model.FaceDetail;
   import com.fasterxml.jackson.databind.ObjectMapper;
   import java.util.List;
   
   
   public class DetectFaces {
      
      
      public static void main(String[] args) throws Exception {
   
         String photo = "input.jpg";
         String bucket = "bucket";
   
         AmazonRekognition rekognitionClient = AmazonRekognitionClientBuilder.defaultClient();
   
   
         DetectFacesRequest request = new DetectFacesRequest()
            .withImage(new Image()
               .withS3Object(new S3Object()
                  .withName(photo)
                  .withBucket(bucket)))
            .withAttributes(Attribute.ALL);
         // Replace Attribute.ALL with Attribute.DEFAULT to get default values.
   
         try {
            DetectFacesResult result = rekognitionClient.detectFaces(request);
            List < FaceDetail > faceDetails = result.getFaceDetails();
   
            for (FaceDetail face: faceDetails) {
               if (request.getAttributes().contains("ALL")) {
                  AgeRange ageRange = face.getAgeRange();
                  System.out.println("The detected face is estimated to be between "
                     + ageRange.getLow().toString() + " and " + ageRange.getHigh().toString()
                     + " years old.");
                  System.out.println("Here's the complete set of attributes:");
               } else { // non-default attributes have null values.
                  System.out.println("Here's the default set of attributes:");
               }
   
               ObjectMapper objectMapper = new ObjectMapper();
               System.out.println(objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(face));
            }
   
         } catch (AmazonRekognitionException e) {
            e.printStackTrace();
         }
   
      }
   
   }