app.py

import os
import uuid
import base64
import requests
import numpy as np
from PIL import Image
from io import BytesIO
from pathlib import Path
from dotenv import load_dotenv
import gradio as gr
from gradio_imageslider import ImageSlider  # Ensure this library is installed

# Load environment variables from the .env file
load_dotenv()

# Define the output folder
output_folder = Path('output_images')
output_folder.mkdir(exist_ok=True)


def numpy_to_pil(image: np.ndarray) -> Image.Image:
    """Convert a numpy array to a PIL Image."""
    mode = "RGB" if image.dtype == np.uint8 else "F"
    return Image.fromarray(image.astype('uint8'), mode)


def process_image(image: np.ndarray):
    """
    Process the input image by sending it to the backend and saving the output.

    Args:
        image (np.ndarray): Input image in numpy array format.

    Returns:
        tuple: Processed images and the path to the saved image.
    """
    # Convert numpy array to PIL Image
    image_pil = numpy_to_pil(image)

    # Encode image to base64
    buffered = BytesIO()
    image_pil.save(buffered, format="PNG")
    img_str = base64.b64encode(buffered.getvalue()).decode('utf-8')

    # Get API key from environment variable
    api_key = os.getenv('API_KEY')

    if not api_key:
        raise ValueError("API_KEY is not set in the environment variables")

        # Send image to backend with API key in headers
    response = requests.post(
        os.getenv('BACKEND_URL') + "/process_image/",
        headers={"access_token": api_key},
        files={"file": ("image.png", base64.b64decode(img_str), "image/png")}
    )

    # Check if the response is successful
    if response.status_code != 200:
        raise Exception(f"Request failed with status code {response.status_code}: {response.text}")

        # Process the response
    result = response.json()
    processed_image_b64 = result["processed_image"]
    processed_image = Image.open(BytesIO(base64.b64decode(processed_image_b64)))

    # Save the processed image
    output_folder = Path("output")  # Make sure this folder exists or create it
    output_folder.mkdir(parents=True, exist_ok=True)
    image_path = output_folder / f"no_bg_image_{uuid.uuid4().hex}.png"
    processed_image.save(image_path)

    return (processed_image, image_pil), str(image_path)

# Define inputs and outputs for the Gradio interface
image = gr.Image(label="Upload a photo")
output_slider = ImageSlider(label="Processed photo", type="pil")

demo = gr.Interface(
    fn=process_image,
    inputs=image,
    outputs=[output_slider, gr.File(label="output png file")],
    title="Magic Eraser",
    examples=[
        ["images/elephant.jpg"],
        ["images/lion.png"],
        ["images/tartaruga.png"],
    ]
)

if __name__ == "__main__":
    demo.launch()