Suche nach Gesichtern in gespeicherten Videos

Um ein Video nach passenden Gesichtern zu durchsuchen (SDK)

1. Erstellen Sie eine Sammlung.

2. Indizieren Sie ein Gesicht in der Sammlung.

3. Führen Sie Analysieren eines in einem Amazon S3 S3-Bucket gespeicherten Videos mit Java oder Python (SDK) aus.

4. Fügen Sie den folgenden Code in der Klasse VideoDetect ein, die Sie in Schritt 3 erstellt haben.

   Java

      //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.)
   
          //Face collection search in video ==================================================================
          private static void StartFaceSearchCollection(String bucket, String video, String collection) throws Exception{
   
           NotificationChannel channel= new NotificationChannel()
                   .withSNSTopicArn(snsTopicArn)
                   .withRoleArn(roleArn);
   
           StartFaceSearchRequest req = new StartFaceSearchRequest()
                   .withCollectionId(collection)
                   .withVideo(new Video()
                           .withS3Object(new S3Object()
                                   .withBucket(bucket)
                                   .withName(video)))
                   .withNotificationChannel(channel);
   
   
   
           StartFaceSearchResult startPersonCollectionSearchResult = rek.startFaceSearch(req);
           startJobId=startPersonCollectionSearchResult.getJobId();
   
       } 
   
       //Face collection search in video ==================================================================
       private static void GetFaceSearchCollectionResults() throws Exception{
   
          GetFaceSearchResult faceSearchResult=null;
          int maxResults=10;
          String paginationToken=null;
   
          do {
   
              if (faceSearchResult !=null){
                  paginationToken = faceSearchResult.getNextToken();
              }
   
   
              faceSearchResult  = rek.getFaceSearch(
                      new GetFaceSearchRequest()
                      .withJobId(startJobId)
                      .withMaxResults(maxResults)
                      .withNextToken(paginationToken)
                      .withSortBy(FaceSearchSortBy.TIMESTAMP)
                      );
   
   
              VideoMetadata videoMetaData=faceSearchResult.getVideoMetadata();
   
              System.out.println("Format: " + videoMetaData.getFormat());
              System.out.println("Codec: " + videoMetaData.getCodec());
              System.out.println("Duration: " + videoMetaData.getDurationMillis());
              System.out.println("FrameRate: " + videoMetaData.getFrameRate());
              System.out.println();      
   
   
              //Show search results
              List<PersonMatch> matches= 
                      faceSearchResult.getPersons();
   
              for (PersonMatch match: matches) { 
                  long milliSeconds=match.getTimestamp();
                  System.out.print("Timestamp: " + Long.toString(milliSeconds));
                  System.out.println(" Person number: " + match.getPerson().getIndex());
                  List <FaceMatch> faceMatches = match.getFaceMatches();
                  if (faceMatches != null) {
                      System.out.println("Matches in collection...");
                      for (FaceMatch faceMatch: faceMatches){
                          Face face=faceMatch.getFace();
                          System.out.println("Face Id: "+ face.getFaceId());
                          System.out.println("Similarity: " + faceMatch.getSimilarity().toString());
                          System.out.println();
                      }
                  }
                  System.out.println();           
              } 
   
              System.out.println(); 
   
          } while (faceSearchResult !=null && faceSearchResult.getNextToken() != null);
   
      }
   

   Ersetzen Sie in der Funktion main die folgenden Zeilen:

           StartLabelDetection(bucket, video);
   
           if (GetSQSMessageSuccess()==true)
           	GetLabelDetectionResults();

   mit:

           String collection="collection";
           StartFaceSearchCollection(bucket, video, collection);
   
           if (GetSQSMessageSuccess()==true)
           	GetFaceSearchCollectionResults();

   Java V2

   Dieser Code stammt aus dem GitHub Repository mit AWS SDK Dokumentationsbeispielen. Das vollständige Beispiel finden Sie hier.

   import software.amazon.awssdk.regions.Region;
   import software.amazon.awssdk.services.rekognition.RekognitionClient;
   import software.amazon.awssdk.services.rekognition.model.*;
   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 VideoDetectFaces {
       private static String startJobId = "";
   
       public static void main(String[] args) {
           final String usage = """
   
                   Usage:    <bucket> <video> <topicArn> <roleArn>
   
                   Where:
                      bucket - The name of the bucket in which the video is located (for example, (for example, myBucket).\s
                      video - The name of video (for example, people.mp4).\s
                      topicArn - The ARN of the Amazon Simple Notification Service (Amazon SNS) topic.\s
                      roleArn - The ARN of the AWS Identity and Access Management (IAM) role to use.\s
                   """;
   
           if (args.length != 4) {
               System.out.println(usage);
               System.exit(1);
           }
   
           String bucket = args[0];
           String video = args[1];
           String topicArn = args[2];
           String roleArn = args[3];
   
           Region region = Region.US_EAST_1;
           RekognitionClient rekClient = RekognitionClient.builder()
                   .region(region)
                   .build();
   
           NotificationChannel channel = NotificationChannel.builder()
                   .snsTopicArn(topicArn)
                   .roleArn(roleArn)
                   .build();
   
           startFaceDetection(rekClient, channel, bucket, video);
           getFaceResults(rekClient);
           System.out.println("This example is done!");
           rekClient.close();
       }
   
       public static void startFaceDetection(RekognitionClient rekClient,
               NotificationChannel channel,
               String bucket,
               String video) {
           try {
               S3Object s3Obj = S3Object.builder()
                       .bucket(bucket)
                       .name(video)
                       .build();
   
               Video vidOb = Video.builder()
                       .s3Object(s3Obj)
                       .build();
   
               StartFaceDetectionRequest faceDetectionRequest = StartFaceDetectionRequest.builder()
                       .jobTag("Faces")
                       .faceAttributes(FaceAttributes.ALL)
                       .notificationChannel(channel)
                       .video(vidOb)
                       .build();
   
               StartFaceDetectionResponse startLabelDetectionResult = rekClient.startFaceDetection(faceDetectionRequest);
               startJobId = startLabelDetectionResult.jobId();
   
           } catch (RekognitionException e) {
               System.out.println(e.getMessage());
               System.exit(1);
           }
       }
   
       public static void getFaceResults(RekognitionClient rekClient) {
           try {
               String paginationToken = null;
               GetFaceDetectionResponse faceDetectionResponse = null;
               boolean finished = false;
               String status;
               int yy = 0;
   
               do {
                   if (faceDetectionResponse != null)
                       paginationToken = faceDetectionResponse.nextToken();
   
                   GetFaceDetectionRequest recognitionRequest = GetFaceDetectionRequest.builder()
                           .jobId(startJobId)
                           .nextToken(paginationToken)
                           .maxResults(10)
                           .build();
   
                   // Wait until the job succeeds.
                   while (!finished) {
   
                       faceDetectionResponse = rekClient.getFaceDetection(recognitionRequest);
                       status = faceDetectionResponse.jobStatusAsString();
   
                       if (status.compareTo("SUCCEEDED") == 0)
                           finished = true;
                       else {
                           System.out.println(yy + " status is: " + status);
                           Thread.sleep(1000);
                       }
                       yy++;
                   }
   
                   finished = false;
   
                   // Proceed when the job is done - otherwise VideoMetadata is null.
                   VideoMetadata videoMetaData = faceDetectionResponse.videoMetadata();
                   System.out.println("Format: " + videoMetaData.format());
                   System.out.println("Codec: " + videoMetaData.codec());
                   System.out.println("Duration: " + videoMetaData.durationMillis());
                   System.out.println("FrameRate: " + videoMetaData.frameRate());
                   System.out.println("Job");
   
                   // Show face information.
                   List<FaceDetection> faces = faceDetectionResponse.faces();
                   for (FaceDetection face : faces) {
                       String age = face.face().ageRange().toString();
                       String smile = face.face().smile().toString();
                       System.out.println("The detected face is estimated to be"
                               + age + " years old.");
                       System.out.println("There is a smile : " + smile);
                   }
   
               } while (faceDetectionResponse != null && faceDetectionResponse.nextToken() != null);
   
           } catch (RekognitionException | InterruptedException e) {
               System.out.println(e.getMessage());
               System.exit(1);
           }
       }
   }
   

   Python

   #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.)
   
       # ============== Face Search ===============
       def StartFaceSearchCollection(self,collection):
           response = self.rek.start_face_search(Video={'S3Object':{'Bucket':self.bucket,'Name':self.video}},
               CollectionId=collection,
               NotificationChannel={'RoleArn':self.roleArn, 'SNSTopicArn':self.snsTopicArn})
           
           self.startJobId=response['JobId']
           
           print('Start Job Id: ' + self.startJobId)
   
   
       def GetFaceSearchCollectionResults(self):
           maxResults = 10
           paginationToken = ''
   
           finished = False
   
           while finished == False:
               response = self.rek.get_face_search(JobId=self.startJobId,
                                           MaxResults=maxResults,
                                           NextToken=paginationToken)
   
               print(response['VideoMetadata']['Codec'])
               print(str(response['VideoMetadata']['DurationMillis']))
               print(response['VideoMetadata']['Format'])
               print(response['VideoMetadata']['FrameRate'])
   
               for personMatch in response['Persons']:
                   print('Person Index: ' + str(personMatch['Person']['Index']))
                   print('Timestamp: ' + str(personMatch['Timestamp']))
   
                   if ('FaceMatches' in personMatch):
                       for faceMatch in personMatch['FaceMatches']:
                           print('Face ID: ' + faceMatch['Face']['FaceId'])
                           print('Similarity: ' + str(faceMatch['Similarity']))
                   print()
               if 'NextToken' in response:
                   paginationToken = response['NextToken']
               else:
                   finished = True
               print()

   Ersetzen Sie in der Funktion main die folgenden Zeilen:

       analyzer.StartLabelDetection()
       if analyzer.GetSQSMessageSuccess()==True:
           analyzer.GetLabelDetectionResults()

   mit:

       collection='tests'
       analyzer.StartFaceSearchCollection(collection)
       
       if analyzer.GetSQSMessageSuccess()==True:
           analyzer.GetFaceSearchCollectionResults()

   Wenn Sie zusätzlich zu Analysieren eines in einem Amazon S3 S3-Bucket gespeicherten Videos mit Java oder Python (SDK) bereits ein anderes Videobeispiel ausgeführt haben, ist der zu ersetzende Code möglicherweise anders.

5. Ändern Sie den Wert von collection in den Namen der Sammlung, die Sie in Schritt 1 erstellt haben.

6. Führen Sie den Code aus. Es wird eine Liste der Personen im Video angezeigt, deren Gesichter mit denen in der Eingabesammlung übereinstimmen. Zusätzlich werden die Tracking-Daten für jede gefundene Person angezeigt.