Create extract_images.py

extract_images.py

@@ -0,0 +1,58 @@
+import os
+from io import BytesIO
+from PIL import Image
+import argparse
+
+import dask.dataframe as dd
+
+def save_image(row, image_column, format, save_folder, print_logs):
+    row_id = row.name
+
+    try:
+        byte_string = row[image_column]
+        img = Image.open(BytesIO(byte_string))
+        img_path = os.path.join(save_folder, f'image_{row_id}.{format}')
+        img.save(img_path)
+        if print_logs:
+            print(f"Saving image to {img_path}")
+    except Exception as e:
+        return f'Error saving image for row {row_id}: {str(e)}'
+
+
+def main():
+    parser = argparse.ArgumentParser(description='Download and save images from a Parquet file.')
+    parser.add_argument('--parquet_file',
+                        type=str,
+                        help='Path to the Parquet file or folder containing the images')
+    parser.add_argument('--save_folder',
+                        type=str,
+                        help='The folder where to save the images to')
+    parser.add_argument('--image_column',
+                        type=str,
+                        default="data",
+                        required=False,
+                        help='Name of the column containing image byte strings, defaults to "data"')
+    parser.add_argument('--format',
+                        type=str,
+                        default="jpg",
+                        required=False,
+                        help='Image format (e.g., png, jpg), defaults to "jpgs"')
+    parser.add_argument('--print_logs',
+                        type=bool,
+                        default=False,
+                        required=False,
+                        help='Flag to enable saving logs when writing images, defaults to False')
+    args = parser.parse_args()
+
+    ddf = dd.read_parquet(args.parquet_file)
+
+    results = ddf.apply(save_image, axis=1, meta='str',
+                        image_column=args.image_column,
+                        save_folder=args.save_folder,
+                        format=args.format,
+                        print_logs=args.print_logs)
+    results.compute()  
+
+
+if __name__ == "__main__":
+    main()