Membuat file manifes klasifikasi dari CSV file

Untuk membuat file manifes dari CSV file

1. Buat CSV file dengan bidang berikut di setiap baris (satu baris per gambar). Jangan menambahkan baris header ke CSV file.

   Bidang 1	Bidang 2
   Nama gambar atau jalur Amazon S3 pada gambar. Misalnya, s3://s3bucket/circuitboard/train/anomaly/train-anomaly_10.jpg. Anda tidak dapat memiliki campuran gambar dengan jalur Amazon S3 dan gambar tanpa.	Klasifikasi anomali untuk gambar (normalatauanomaly).

   Misalnya s3://s3bucket/circuitboard/train/anomaly/image_10.jpg,anomaly atau image_11.jpg,normal

2. Simpan file CSV.

3. Jalankan skrip Python berikut. Berikan argumen berikut:

   • csv_file— CSV File yang Anda buat di langkah 1.

   • (Opsional) --s3-path s3://path_to_folder/ - Jalur Amazon S3 untuk ditambahkan ke nama file gambar (bidang 1). Gunakan --s3-path jika gambar di bidang 1 belum berisi jalur S3.

   # Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
   # SPDX-License-Identifier:  Apache-2.0
   """
   Purpose
   Shows how to create an Amazon Lookout for Vision manifest file from a CSV file.
   The CSV file format is image location,anomaly classification (normal or anomaly)
   For example:
   s3://s3bucket/circuitboard/train/anomaly/train_11.jpg,anomaly
   s3://s3bucket/circuitboard/train/normal/train_1.jpg,normal
   
   If necessary, use the bucket argument to specify the Amazon S3 bucket folder for the images.
   """
   
   from datetime import datetime, timezone
   import argparse
   import logging
   import csv
   import os
   import json
   
   logger = logging.getLogger(__name__)
   
   
   def check_errors(csv_file):
       """
       Checks for duplicate images and incorrect classifications in a CSV file.
       If duplicate images or invalid anomaly assignments are found, an errors CSV file
       and deduplicated CSV file are created. Only the first
       occurrence of a duplicate is recorded. Other duplicates are recorded in the errors file.
       :param csv_file: The source CSV file
       :return: True if errors or duplicates are found, otherwise false.
       """
   
       logger.info("Checking %s.", csv_file)
   
       errors_found = False
       errors_file = f"{os.path.splitext(csv_file)[0]}_errors.csv"
       deduplicated_file = f"{os.path.splitext(csv_file)[0]}_deduplicated.csv"
   
       with open(csv_file, 'r', encoding="UTF-8") as input_file,\
               open(deduplicated_file, 'w', encoding="UTF-8") as dedup,\
               open(errors_file, 'w', encoding="UTF-8") as errors:
   
           reader = csv.reader(input_file, delimiter=',')
           dedup_writer = csv.writer(dedup)
           error_writer = csv.writer(errors)
           line = 1
           entries = set()
           for row in reader:
   
               # Skip empty lines.
               if not ''.join(row).strip():
                   continue
   
               # Record any incorrect classifications.
               if not row[1].lower() == "normal" and not row[1].lower() == "anomaly":
                   error_writer.writerow(
                       [line, row[0], row[1], "INVALID_CLASSIFICATION"])
                   errors_found = True
   
               # Write first image entry to dedup file and record duplicates.
               key = row[0]
               if key not in entries:
                   dedup_writer.writerow(row)
                   entries.add(key)
               else:
                   error_writer.writerow([line, row[0], row[1], "DUPLICATE"])
                   errors_found = True
               line += 1
   
       if errors_found:
           logger.info("Errors found check %s.", errors_file)
       else:
           os.remove(errors_file)
           os.remove(deduplicated_file)
   
       return errors_found
   
   
   def create_manifest_file(csv_file, manifest_file, s3_path):
       """
       Read a CSV file and create an Amazon Lookout for Vision classification manifest file.
       :param csv_file: The source CSV file.
       :param manifest_file: The name of the manifest file to create.
       :param s3_path: The Amazon S3 path to the folder that contains the images.
       """
       logger.info("Processing CSV file %s.", csv_file)
   
       image_count = 0
       anomalous_count = 0
   
       with open(csv_file, newline='', encoding="UTF-8") as csvfile,\
           open(manifest_file, "w", encoding="UTF-8") as output_file:
   
           image_classifications = csv.reader(
               csvfile, delimiter=',', quotechar='|')
   
           # Process each row (image) in the CSV file.
           for row in image_classifications:
               # Skip empty lines.
               if not ''.join(row).strip():
                   continue
   
               source_ref = str(s3_path) + row[0]
               classification = 0
   
               if row[1].lower() == 'anomaly':
                   classification = 1
                   anomalous_count += 1
   
              # Create the JSON line.
               json_line = {}
               json_line['source-ref'] = source_ref
               json_line['anomaly-label'] = str(classification)
   
               metadata = {}
               metadata['confidence'] = 1
               metadata['job-name'] = "labeling-job/anomaly-classification"
               metadata['class-name'] = row[1]
               metadata['human-annotated'] = "yes"
               metadata['creation-date'] = datetime.now(timezone.utc).strftime('%Y-%m-%dT%H:%M:%S.%f')
               metadata['type'] = "groundtruth/image-classification"
   
               json_line['anomaly-label-metadata'] = metadata
   
               output_file.write(json.dumps(json_line))
               output_file.write('\n')
               image_count += 1
   
       logger.info("Finished creating manifest file %s.\n"
                   "Images: %s\nAnomalous: %s",
                   manifest_file,
                   image_count,
                   anomalous_count)
       return image_count, anomalous_count
   
   
   def add_arguments(parser):
       """
       Add command line arguments to the parser.
       :param parser: The command line parser.
       """
   
       parser.add_argument(
           "csv_file", help="The CSV file that you want to process."
       )
   
       parser.add_argument(
           "--s3_path", help="The Amazon S3 bucket and folder path for the images."
           " If not supplied, column 1 is assumed to include the Amazon S3 path.", required=False
       )
   
   
   def main():
   
       logging.basicConfig(level=logging.INFO,
                           format="%(levelname)s: %(message)s")
   
       try:
   
           # Get command line arguments.
           parser = argparse.ArgumentParser(usage=argparse.SUPPRESS)
           add_arguments(parser)
           args = parser.parse_args()
           s3_path = args.s3_path
           if s3_path is None:
               s3_path = ""
   
           csv_file = args.csv_file
           csv_file_no_extension = os.path.splitext(csv_file)[0]
           manifest_file = csv_file_no_extension + '.manifest'
   
           # Create manifest file if there are no duplicate images.
           if check_errors(csv_file):
               print(f"Issues found. Use {csv_file_no_extension}_errors.csv "\
                   "to view duplicates and errors.")
               print(f"{csv_file}_deduplicated.csv contains the first"\
                   "occurrence of a duplicate.\n"
                     "Update as necessary with the correct information.")
               print(f"Re-run the script with {csv_file_no_extension}_deduplicated.csv")
           else:
               print('No duplicates found. Creating manifest file.')
   
               image_count, anomalous_count = create_manifest_file(csv_file, manifest_file, s3_path)
   
               print(f"Finished creating manifest file: {manifest_file} \n")
   
               normal_count = image_count-anomalous_count
               print(f"Images processed: {image_count}")
               print(f"Normal: {normal_count}")
               print(f"Anomalous: {anomalous_count}")
   
       except FileNotFoundError as err:
           logger.exception("File not found.:%s", err)
           print(f"File not found: {err}. Check your input CSV file.")
   
   if __name__ == "__main__":
       main()
   
   

4. Jika gambar duplikat terjadi atau kesalahan klasifikasi terjadi:

   1. Gunakan file kesalahan untuk memperbarui file dedupulisasi atau CSV file input. CSV

   2. Jalankan skrip lagi dengan file deduplikat yang diperbarui atau CSV file input CSV yang diperbarui.

5. Jika Anda berencana menggunakan kumpulan data pengujian, ulangi langkah 1—4 untuk membuat file manifes untuk kumpulan data pengujian Anda.

6. Jika perlu, salin gambar dari komputer Anda ke jalur bucket Amazon S3 yang Anda tentukan di kolom 1 CSV file (atau ditentukan dalam baris --s3-path perintah). Untuk menyalin gambar, masukkan perintah berikut pada prompt perintah.

   aws s3 cp --recursive your-local-folder/ s3://your-target-S3-location/

7. Ikuti petunjuk di Membuat kumpulan data dengan file manifes (konsol) untuk membuat kumpulan data. Jika Anda menggunakan AWS SDK, lihatMembuat kumpulan data dengan file manifes () SDK.