Mendeteksi label dalam citra

Untuk mendeteksi label dalam citra

1. Jika belum:

   1. Buat atau perbarui pengguna dengan AmazonRekognitionFullAccess dan AmazonS3ReadOnlyAccess izin. Untuk informasi selengkapnya, lihat Langkah 1: Siapkan AWS akun dan buat Pengguna.

   2. Instal dan konfigurasikan AWS CLI dan AWS SDKs. Untuk informasi selengkapnya, lihat Langkah 2: Siapkan AWS CLI and AWS SDKs.

2. Unggah citra yang berisi satu atau beberapa objek—seperti pohon, rumah, dan perahu—ke bucket S3 Anda. Citra harus dalam format .jpg atau .png.

   Untuk petunjuk, lihat Mengunggah Objek ke Amazon S3 di Panduan Pengguna Layanan Penyimpanan Sederhana Amazon.

3. Gunakan contoh berikut untuk memanggil operasi DetectLabels.

   Java

   Contoh ini menampilkan daftar label yang terdeteksi pada citra input. Ganti nilai-nilai bucket dan photo dengan nama bucket Amazon S3 dan citra yang Anda gunakan di langkah 2.

   
   package com.amazonaws.samples;
   import java.util.List;
   
   import com.amazonaws.services.rekognition.model.BoundingBox;
   import com.amazonaws.services.rekognition.model.DetectLabelsRequest;
   import com.amazonaws.services.rekognition.model.DetectLabelsResult;
   import com.amazonaws.services.rekognition.model.Image;
   import com.amazonaws.services.rekognition.model.Instance;
   import com.amazonaws.services.rekognition.model.Label;
   import com.amazonaws.services.rekognition.model.Parent;
   import com.amazonaws.services.rekognition.model.S3Object;
   import com.amazonaws.services.rekognition.AmazonRekognition;
   import com.amazonaws.services.rekognition.AmazonRekognitionClientBuilder;
   import com.amazonaws.services.rekognition.model.AmazonRekognitionException;
   
   public class DetectLabels {
   
       public static void main(String[] args) throws Exception {
   
           String photo = "photo";
           String bucket = "bucket";
   
           AmazonRekognition rekognitionClient = AmazonRekognitionClientBuilder.defaultClient();
   
           DetectLabelsRequest request = new DetectLabelsRequest()
                   .withImage(new Image().withS3Object(new S3Object().withName(photo).withBucket(bucket)))
                   .withMaxLabels(10).withMinConfidence(75F);
   
           try {
               DetectLabelsResult result = rekognitionClient.detectLabels(request);
               List<Label> labels = result.getLabels();
   
               System.out.println("Detected labels for " + photo + "\n");
               for (Label label : labels) {
                   System.out.println("Label: " + label.getName());
                   System.out.println("Confidence: " + label.getConfidence().toString() + "\n");
   
                   List<Instance> instances = label.getInstances();
                   System.out.println("Instances of " + label.getName());
                   if (instances.isEmpty()) {
                       System.out.println("  " + "None");
                   } else {
                       for (Instance instance : instances) {
                           System.out.println("  Confidence: " + instance.getConfidence().toString());
                           System.out.println("  Bounding box: " + instance.getBoundingBox().toString());
                       }
                   }
                   System.out.println("Parent labels for " + label.getName() + ":");
                   List<Parent> parents = label.getParents();
                   if (parents.isEmpty()) {
                       System.out.println("  None");
                   } else {
                       for (Parent parent : parents) {
                           System.out.println("  " + parent.getName());
                       }
                   }
                   System.out.println("--------------------");
                   System.out.println();
                  
               }
           } catch (AmazonRekognitionException e) {
               e.printStackTrace();
           }
       }
   }

   AWS CLI

   Contoh ini menampilkan output JSON dari operasi CLI detect-labels. Ganti nilai-nilai bucket dan photo dengan nama bucket Amazon S3 dan citra yang Anda gunakan di Langkah 2. Ganti nilai profile-name dengan nama profil pengembang Anda.

   aws rekognition detect-labels --image '{ "S3Object": { "Bucket": "bucket-name", "Name": "file-name" } }' \
   --features GENERAL_LABELS IMAGE_PROPERTIES \
   --settings '{"ImageProperties": {"MaxDominantColors":1}, {"GeneralLabels":{"LabelInclusionFilters":["Cat"]}}}' \
   --profile profile-name \
   --region us-east-1

   Jika Anda mengakses CLI pada perangkat Windows, gunakan tanda kutip ganda alih-alih tanda kutip tunggal dan hindari tanda kutip ganda bagian dalam dengan garis miring terbalik (yaitu\) untuk mengatasi kesalahan parser yang mungkin Anda temui. Sebagai contoh, lihat berikut ini:

   
   aws rekognition detect-labels --image "{\"S3Object\":{\"Bucket\":\"bucket-name\",\"Name\":\"file-name\"}}" --features GENERAL_LABELS IMAGE_PROPERTIES \
   --settings "{\"GeneralLabels\":{\"LabelInclusionFilters\":[\"Car\"]}}" --profile profile-name --region us-east-1
                               

   Python

   Contoh ini menampilkan label yang terdeteksi dalam citra input. Dalam fungsi main, ganti nilai-nilai bucket dan photo dengan nama bucket Amazon S3 dan citra yang Anda gunakan pada Langkah 2. Ganti nilai profile_name di baris yang membuat sesi Rekognition dengan nama profil pengembang Anda.

   #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.)
   
   import boto3
   
   def detect_labels(photo, bucket):
   
        session = boto3.Session(profile_name='profile-name')
        client = session.client('rekognition')
   
        response = client.detect_labels(Image={'S3Object':{'Bucket':bucket,'Name':photo}},
        MaxLabels=10,
        # Uncomment to use image properties and filtration settings
        #Features=["GENERAL_LABELS", "IMAGE_PROPERTIES"],
        #Settings={"GeneralLabels": {"LabelInclusionFilters":["Cat"]},
        # "ImageProperties": {"MaxDominantColors":10}}
        )
   
        print('Detected labels for ' + photo)
        print()
        for label in response['Labels']:
            print("Label: " + label['Name'])
            print("Confidence: " + str(label['Confidence']))
            print("Instances:")
   
            for instance in label['Instances']:
                print(" Bounding box")
                print(" Top: " + str(instance['BoundingBox']['Top']))
                print(" Left: " + str(instance['BoundingBox']['Left']))
                print(" Width: " + str(instance['BoundingBox']['Width']))
                print(" Height: " + str(instance['BoundingBox']['Height']))
                print(" Confidence: " + str(instance['Confidence']))
                print()
   
            print("Parents:")
            for parent in label['Parents']:
               print(" " + parent['Name'])
   
            print("Aliases:")
            for alias in label['Aliases']:
                print(" " + alias['Name'])
   
                print("Categories:")
            for category in label['Categories']:
                print(" " + category['Name'])
                print("----------")
                print()
   
        if "ImageProperties" in str(response):
            print("Background:")
            print(response["ImageProperties"]["Background"])
            print()
            print("Foreground:")
            print(response["ImageProperties"]["Foreground"])
            print()
            print("Quality:")
            print(response["ImageProperties"]["Quality"])
            print()
   
        return len(response['Labels'])
   
   def main():
       photo = 'photo-name'
       bucket = 'amzn-s3-demo-bucket'
       label_count = detect_labels(photo, bucket)
       print("Labels detected: " + str(label_count))
   
   if __name__ == "__main__":
       main()
   

   .NET

   Contoh ini menampilkan daftar label yang terdeteksi pada citra input. Ganti nilai-nilai bucket dan photo dengan nama bucket Amazon S3 dan citra yang Anda gunakan di Langkah 2.

   //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 Amazon.Rekognition;
   using Amazon.Rekognition.Model;
   
   public class DetectLabels
   {
       public static void Example()
       {
           String photo = "input.jpg";
           String bucket = "amzn-s3-demo-bucket";
   
           AmazonRekognitionClient rekognitionClient = new AmazonRekognitionClient();
   
           DetectLabelsRequest detectlabelsRequest = new DetectLabelsRequest()
           {
               Image = new Image()
               {
                   S3Object = new S3Object()
                   {
                       Name = photo,
                       Bucket = bucket
                   },
               },
               MaxLabels = 10,
               MinConfidence = 75F
           };
   
           try
           {
               DetectLabelsResponse detectLabelsResponse = rekognitionClient.DetectLabels(detectlabelsRequest);
               Console.WriteLine("Detected labels for " + photo);
               foreach (Label label in detectLabelsResponse.Labels)
                   Console.WriteLine("{0}: {1}", label.Name, label.Confidence);
           }
           catch (Exception e)
           {
               Console.WriteLine(e.Message);
           }
       }
   }

   Ruby

   Contoh ini menampilkan daftar label yang terdeteksi pada citra input. Ganti nilai-nilai bucket dan photo dengan nama bucket Amazon S3 dan citra yang Anda gunakan di Langkah 2.

   
   
      # 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 bucket name without s3://
      photo  = 'photo' # the name of file
      client   = Aws::Rekognition::Client.new credentials: credentials
      attrs = {
        image: {
          s3_object: {
            bucket: bucket,
            name: photo
          },
        },
        max_labels: 10
      }
     response = client.detect_labels attrs
     puts "Detected labels for: #{photo}"
     response.labels.each do |label|
       puts "Label:      #{label.name}"
       puts "Confidence: #{label.confidence}"
       puts "Instances:"
       label['instances'].each do |instance|
         box = instance['bounding_box']
         puts "  Bounding box:"
         puts "    Top:        #{box.top}"
         puts "    Left:       #{box.left}"
         puts "    Width:      #{box.width}"
         puts "    Height:     #{box.height}"
         puts "  Confidence: #{instance.confidence}"
       end
       puts "Parents:"
       label.parents.each do |parent|
         puts "  #{parent.name}"
       end
       puts "------------"
       puts ""
     end

   Node.js

   Contoh ini menampilkan daftar label yang terdeteksi pada citra input. Ganti nilai-nilai bucket dan photo dengan nama bucket Amazon S3 dan citra yang Anda gunakan di Langkah 2. Ganti nilai profile_name di baris yang membuat sesi Rekognition dengan nama profil pengembang Anda.

   Jika Anda menggunakan TypeScript definisi, Anda mungkin perlu menggunakan import AWS from 'aws-sdk' alih-alihconst AWS = require('aws-sdk'), untuk menjalankan program dengan Node.js. Anda dapat melihat AWS SDK for Javascript untuk detailnya selengkapnya. Tergantung bagaimana konfigurasi diatur, Anda juga mungkin perlu menentukan wilayah Anda dengan AWS.config.update({region:region});.

   
                                   
   // Load the SDK
   var AWS = require('aws-sdk');
   const bucket = 'bucket-name' // the bucketname without s3://
   const photo  = 'image-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
       },
     },
     MaxLabels: 10
   }
   client.detectLabels(params, function(err, response) {
     if (err) {
       console.log(err, err.stack); // if an error occurred
     } else {
       console.log(`Detected labels for: ${photo}`)
       response.Labels.forEach(label => {
         console.log(`Label:      ${label.Name}`)
         console.log(`Confidence: ${label.Confidence}`)
         console.log("Instances:")
         label.Instances.forEach(instance => {
           let box = instance.BoundingBox
           console.log("  Bounding box:")
           console.log(`    Top:        ${box.Top}`)
           console.log(`    Left:       ${box.Left}`)
           console.log(`    Width:      ${box.Width}`)
           console.log(`    Height:     ${box.Height}`)
           console.log(`  Confidence: ${instance.Confidence}`)
         })
         console.log("Parents:")
         label.Parents.forEach(parent => {
           console.log(`  ${parent.Name}`)
         })
         console.log("------------")
         console.log("")
       }) // for response.labels
     } // if
   });
                               
                               

   Java V2

   Kode ini diambil dari GitHub repositori contoh SDK AWS Dokumentasi. Lihat contoh lengkapnya di sini.

   //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.Image;
   import software.amazon.awssdk.services.rekognition.model.DetectLabelsRequest;
   import software.amazon.awssdk.services.rekognition.model.DetectLabelsResponse;
   import software.amazon.awssdk.services.rekognition.model.Label;
   import software.amazon.awssdk.services.rekognition.model.RekognitionException;
   import software.amazon.awssdk.services.rekognition.model.S3Object;
   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 DetectLabels {
   
       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, ,ImageBucket)." +
               "   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();
   
               DetectLabelsRequest detectLabelsRequest = DetectLabelsRequest.builder()
                   .image(myImage)
                   .maxLabels(10)
                   .build();
   
               DetectLabelsResponse labelsResponse = rekClient.detectLabels(detectLabelsRequest);
               List<Label> labels = labelsResponse.labels();
               System.out.println("Detected labels for the given photo");
               for (Label label: labels) {
                   System.out.println(label.name() + ": " + label.confidence().toString());
               }
   
           } catch (RekognitionException e) {
               System.out.println(e.getMessage());
               System.exit(1);
           }
       }
    // snippet-end:[rekognition.java2.detect_labels.main]
   }