utils.py

import base64
from io import BytesIO
from PIL import Image

# This utility file is included primarily for modularity,
# though the PIL to Base64/Image loading logic is largely handled within models.py
# using the native SDK methods of google-genai and openai for simplicity.

def image_to_base664(img: Image.Image) -> str:
    """Converts a PIL Image object to a base64 encoded string."""
    buffer = BytesIO()
    # Use PNG for high quality transfer compatible with most APIs
    img.save(buffer, format="PNG")
    img_base64 = base64.b64encode(buffer.getvalue()).decode('utf-8')
    return img_base64