Upload base64_image.py

backend/base64_image.py

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+from io import BytesIO
+from base64 import b64encode, b64decode
+from PIL import Image
+
+
+def pil_image_to_base64_str(
+    image: Image,
+    format: str = "JPEG",
+) -> str:
+    buffer = BytesIO()
+    image.save(buffer, format=format)
+    buffer.seek(0)
+    img_base64 = b64encode(buffer.getvalue()).decode("utf-8")
+    return img_base64
+
+
+def base64_image_to_pil(base64_str) -> Image:
+    image_data = b64decode(base64_str)
+    image_buffer = BytesIO(image_data)
+    image = Image.open(image_buffer)
+    return image