

Terjemahan disediakan oleh mesin penerjemah. Jika konten terjemahan yang diberikan bertentangan dengan versi bahasa Inggris aslinya, utamakan versi bahasa Inggris.

# Menganalisis citra yang disimpan di bucket Amazon S3
<a name="images-s3"></a>

Amazon Rekognition Image dapat menganalisis citra yang disimpan dalam bucket Amazon S3 atau citra yang disediakan sebagai bit citra.

Dalam topik ini, Anda menggunakan operasi API [DetectLabels](https://docs.aws.amazon.com/rekognition/latest/APIReference/API_DetectLabels.html) untuk mendeteksi objek, konsep, dan adegan dalam citra (JPEG atau PNG) yang disimpan dalam bucket Amazon S3. Anda meneruskan gambar ke operasi Amazon Rekognition Image API dengan menggunakan parameter input Image[.](https://docs.aws.amazon.com/rekognition/latest/APIReference/API_Image.html) Di dalamnya`Image`, Anda menentukan properti objek [S3Object](https://docs.aws.amazon.com/rekognition/latest/APIReference/API_3Object.html) untuk mereferensikan gambar yang disimpan dalam bucket S3. Bit citra untuk citra yang disimpan dalam bucket Amazon S3 tidak perlu dikodekan ke base64. Untuk informasi selengkapnya, lihat [Spesifikasi citra](images-information.md). 

## Contoh Permintaan
<a name="images-s3-request"></a>

Dalam contoh permintaan JSON ini untuk `DetectLabels`, citra sumber (`input.jpg`) dimuat dari bucket Amazon S3 bernama `amzn-s3-demo-bucket`. Ingat bahwa wilayah untuk bucket S3 yang berisi objek S3 harus sesuai dengan wilayah yang Anda gunakan untuk operasi Amazon Rekognition Image.

```
{
    "Image": {
        "S3Object": {
            "Bucket": "{{amzn-s3-demo-bucket}}",
            "Name": "input.jpg"
        }
    },
    "MaxLabels": 10,
    "MinConfidence": 75
}
```

Contoh berikut menggunakan berbagai AWS SDK dan AWS CLI to call`DetectLabels`. Untuk informasi tentang respons operasi `DetectLabels`, lihat [DetectLabels respon](labels-detect-labels-image.md#detectlabels-response).

**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 akun AWS dan buat Pengguna](setting-up.md#setting-up-iam).

   1. Instal dan konfigurasikan AWS CLI dan AWS SDK. Untuk informasi selengkapnya, lihat [Langkah 2: Siapkan AWS CLI and AWS SDK](setup-awscli-sdk.md). Pastikan bahwa Anda telah memberi pengguna yang memanggil operasi API izin yang tepat untuk akses terprogram, lihat [Memberikan akses programatis](sdk-programmatic-access.md) petunjuk tentang cara melakukannya.

1. 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](https://docs.aws.amazon.com/AmazonS3/latest/userguide/upload-objects.html) S3 di Panduan Pengguna *Layanan Penyimpanan Sederhana Amazon*.

1. 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. 

   ```
   //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 com.amazonaws.samples;
   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.DetectLabelsRequest;
   import com.amazonaws.services.rekognition.model.DetectLabelsResult;
   import com.amazonaws.services.rekognition.model.Image;
   import com.amazonaws.services.rekognition.model.Label;
   import com.amazonaws.services.rekognition.model.S3Object;
   import java.util.List;
   
   public class DetectLabels {
   
      public static void main(String[] args) throws Exception {
   
         String photo = "input.jpg";
         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);
            for (Label label: labels) {
               System.out.println(label.getName() + ": " + label.getConfidence().toString());
            }
         } 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` di baris yang membuat sesi Rekognition 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 menggunakan Windows, Anda mungkin perlu menghindari tanda qutasi seperti yang terlihat pada contoh di bawah 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
   ```

------
#### [ Java V2 ]

   Kode ini diambil dari GitHub repositori contoh SDK AWS Dokumentasi. Lihat contoh lengkapnya [di sini](https://github.com/awsdocs/aws-doc-sdk-examples/blob/master/javav2/example_code/rekognition/src/main/java/com/example/rekognition/DetectLabelsS3.java).

   ```
   //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]
   }
   ```

------
#### [ Python ]

   Contoh ini menampilkan label yang terdeteksi dalam 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.

   ```
   #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()
   ```

------
#### [ Node.Js ]

   Contoh ini menampilkan informasi tentang label yang terdeteksi dalam gambar. 

   Ubah nilai `photo` dengan nama jalur dan file dari sebuah file citra yang berisi satu wajah selebriti atau lebih. Ubah nilai `bucket` ke nama bucket S3 yang berisi file gambar yang disediakan. Ubah nilai `REGION` ke nama wilayah yang terkait dengan akun Anda. Ganti nilai `profile_name` di baris yang membuat sesi Rekognition dengan nama profil pengembang Anda. 

   ```
   // Import required AWS SDK clients and commands for Node.js
   import { DetectLabelsCommand } from  "@aws-sdk/client-rekognition";
   import  { RekognitionClient } from "@aws-sdk/client-rekognition";
   
   import {fromIni} from '@aws-sdk/credential-providers';
   
   // Set the AWS Region.
   const REGION = "region-name"; //e.g. "us-east-1"
   
   // Create SNS service object.
   const rekogClient = new RekognitionClient({
     region: REGION,
     credentials: fromIni({
          profile: 'profile-name',
     }),
   });
   
   const bucket = 'bucket-name'
   const photo = 'photo-name'
   
   // Set params
   const params = {For example, to grant
       Image: {
         S3Object: {
           Bucket: bucket,
           Name: photo
         },
       },
     }
   
   const detect_labels = async () => {
       try {
           const response = await rekogClient.send(new DetectLabelsCommand(params));
           console.log(response.Labels)
           response.Labels.forEach(label =>{
               console.log(`Confidence: ${label.Confidence}`)
               console.log(`Name: ${label.Name}`)
               console.log('Instances:')
               label.Instances.forEach(instance => {
                   console.log(instance)
               })
               console.log('Parents:')
               label.Parents.forEach(name => {
                   console.log(name)
               })
               console.log("-------")
           })
           return response; // For unit tests.
         } catch (err) {
           console.log("Error", err);
         }
   };
   
   detect_labels();
   ```

------
#### [ .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
   ```

------



## Contoh respons
<a name="images-s3-response"></a>

Respons dari `DetectLabels` adalah array label yang terdeteksi dalam citra dan tingkat kepercayaan yang mereka deteksi. 

Ketika Anda melakukan operasi `DetectLabels` pada citra, Amazon Rekognition mengembalikan output yang mirip dengan contoh respons berikut.

Respons menunjukkan bahwa operasi mendeteksi beberapa label termasuk Orang, Kendaraan, dan Mobil. Setiap label memiliki tingkat kepercayaan yang terkait. Misalnya, algoritme deteksi adalah 98.991432% kepercayaan bahwa citra berisi seseorang.

Respons juga mencakup label leluhur untuk label di array `Parents`. Misalnya, label Otomobil memiliki dua label induk bernama Kendaraan dan Transportasi. 

Respons untuk label objek umum mencakup informasi kotak pembatas untuk lokasi label pada citra input. Misalnya, label Orang memiliki array instans yang berisi dua kotak batas. Ini adalah lokasi dari dua orang yang terdeteksi dalam citra.

Bidang `LabelModelVersion` berisi nomor versi model deteksi yang digunakan oleh `DetectLabels`. 

Untuk informasi selengkapnya tentang menggunakan operasi `DetectLabels`, lihat [Mendeteksi objek dan konsep](labels.md).

```
{
            
    {
    "Labels": [
        {
            "Name": "Vehicle",
            "Confidence": 99.15271759033203,
            "Instances": [],
            "Parents": [
                {
                    "Name": "Transportation"
                }
            ]
        },
        {
            "Name": "Transportation",
            "Confidence": 99.15271759033203,
            "Instances": [],
            "Parents": []
        },
        {
            "Name": "Automobile",
            "Confidence": 99.15271759033203,
            "Instances": [],
            "Parents": [
                {
                    "Name": "Vehicle"
                },
                {
                    "Name": "Transportation"
                }
            ]
        },
        {
            "Name": "Car",
            "Confidence": 99.15271759033203,
            "Instances": [
                {
                    "BoundingBox": {
                        "Width": 0.10616336017847061,
                        "Height": 0.18528179824352264,
                        "Left": 0.0037978808395564556,
                        "Top": 0.5039216876029968
                    },
                    "Confidence": 99.15271759033203
                },
                {
                    "BoundingBox": {
                        "Width": 0.2429988533258438,
                        "Height": 0.21577216684818268,
                        "Left": 0.7309805154800415,
                        "Top": 0.5251884460449219
                    },
                    "Confidence": 99.1286392211914
                },
                {
                    "BoundingBox": {
                        "Width": 0.14233611524105072,
                        "Height": 0.15528248250484467,
                        "Left": 0.6494812965393066,
                        "Top": 0.5333095788955688
                    },
                    "Confidence": 98.48368072509766
                },
                {
                    "BoundingBox": {
                        "Width": 0.11086395382881165,
                        "Height": 0.10271988064050674,
                        "Left": 0.10355594009160995,
                        "Top": 0.5354844927787781
                    },
                    "Confidence": 96.45606231689453
                },
                {
                    "BoundingBox": {
                        "Width": 0.06254628300666809,
                        "Height": 0.053911514580249786,
                        "Left": 0.46083059906959534,
                        "Top": 0.5573825240135193
                    },
                    "Confidence": 93.65448760986328
                },
                {
                    "BoundingBox": {
                        "Width": 0.10105438530445099,
                        "Height": 0.12226245552301407,
                        "Left": 0.5743985772132874,
                        "Top": 0.534368634223938
                    },
                    "Confidence": 93.06217193603516
                },
                {
                    "BoundingBox": {
                        "Width": 0.056389667093753815,
                        "Height": 0.17163699865341187,
                        "Left": 0.9427769780158997,
                        "Top": 0.5235804319381714
                    },
                    "Confidence": 92.6864013671875
                },
                {
                    "BoundingBox": {
                        "Width": 0.06003860384225845,
                        "Height": 0.06737709045410156,
                        "Left": 0.22409997880458832,
                        "Top": 0.5441341400146484
                    },
                    "Confidence": 90.4227066040039
                },
                {
                    "BoundingBox": {
                        "Width": 0.02848697081208229,
                        "Height": 0.19150497019290924,
                        "Left": 0.0,
                        "Top": 0.5107086896896362
                    },
                    "Confidence": 86.65286254882812
                },
                {
                    "BoundingBox": {
                        "Width": 0.04067881405353546,
                        "Height": 0.03428703173995018,
                        "Left": 0.316415935754776,
                        "Top": 0.5566273927688599
                    },
                    "Confidence": 85.36471557617188
                },
                {
                    "BoundingBox": {
                        "Width": 0.043411049991846085,
                        "Height": 0.0893595889210701,
                        "Left": 0.18293385207653046,
                        "Top": 0.5394920110702515
                    },
                    "Confidence": 82.21705627441406
                },
                {
                    "BoundingBox": {
                        "Width": 0.031183116137981415,
                        "Height": 0.03989990055561066,
                        "Left": 0.2853088080883026,
                        "Top": 0.5579366683959961
                    },
                    "Confidence": 81.0157470703125
                },
                {
                    "BoundingBox": {
                        "Width": 0.031113790348172188,
                        "Height": 0.056484755128622055,
                        "Left": 0.2580395042896271,
                        "Top": 0.5504819750785828
                    },
                    "Confidence": 56.13441467285156
                },
                {
                    "BoundingBox": {
                        "Width": 0.08586374670267105,
                        "Height": 0.08550430089235306,
                        "Left": 0.5128012895584106,
                        "Top": 0.5438792705535889
                    },
                    "Confidence": 52.37760925292969
                }
            ],
            "Parents": [
                {
                    "Name": "Vehicle"
                },
                {
                    "Name": "Transportation"
                }
            ]
        },
        {
            "Name": "Human",
            "Confidence": 98.9914321899414,
            "Instances": [],
            "Parents": []
        },
        {
            "Name": "Person",
            "Confidence": 98.9914321899414,
            "Instances": [
                {
                    "BoundingBox": {
                        "Width": 0.19360728561878204,
                        "Height": 0.2742200493812561,
                        "Left": 0.43734854459762573,
                        "Top": 0.35072067379951477
                    },
                    "Confidence": 98.9914321899414
                },
                {
                    "BoundingBox": {
                        "Width": 0.03801717236638069,
                        "Height": 0.06597328186035156,
                        "Left": 0.9155802130699158,
                        "Top": 0.5010883808135986
                    },
                    "Confidence": 85.02790832519531
                }
            ],
            "Parents": []
        }
    ],
    "LabelModelVersion": "2.0"
}

    
}
```