app.py

import numpy as np

import gradio as gr

def quantize(val):
    return (np.round(val / 255) * 255).astype(np.uint8)


def sepia(input_img):
    output_img = list(map(quantize, input_img))
    return output_img


iface = gr.Interface(sepia, "image", "pil")

iface.launch()