G22-2023

import numpy as np

from PIL import Image

def adjust_gamma_with_gradient(image_array, start_gamma, end_gamma):

    image_array = np.array(image_array, dtype='float32')

    width, height = image_array.shape[1], image_array.shape[0]

    gamma_range = np.linspace(start_gamma, end_gamma, width)

    inv_gamma_table = [1.0 / g for g in gamma_range]

    table = np.array([((i / 255.0) ** inv_gamma) * 255 for inv_gamma in inv_gamma_table for i in range(256)])

    table = table.reshape((width, 256))

    for i in range(width):

        image_array[:, i] = table[i, image_array[:, i].astype(int)]

    image_array = np.clip(image_array, 0, 255).astype('uint8')

    return image_array