import numpy as np

import gradio as gr

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


def sepia(n, input_img):
    output_img = [quantize(val, n) for val in input_img]
    return output_img


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

iface.launch()