def estimate_portion_size(image):
    """
    Estimate portion size based on image dimensions (e.g., bowl/plate size).
    """
    width, height = image.size
    avg_dimension = (width + height) / 2

    if avg_dimension < 300:
        return "Small (1 person)"
    elif avg_dimension < 600:
        return "Medium (1-2 people)"
    else:
        return "Large (2-4 people)"