

import numpy as np





def 					__lowerCamelCase	( UpperCamelCase__      ):







							'''simple docstring'''






							return 1 / (1 + np.exp(-vector      ))





def 					__lowerCamelCase	( UpperCamelCase__      ):







							'''simple docstring'''






							return vector * sigmoid(UpperCamelCase__      )


if __name__ == "__main__":
					import doctest

					doctest.testmod()







from PIL import Image





def 					__lowerCamelCase	( UpperCamelCase__   ,							UpperCamelCase__      ):







							'''simple docstring'''






							snake_case_							=    (259 * (level + 255)) / (255 * (259 - level))

							def contrast(UpperCamelCase__      ) -> int:
														return int(128 + factor * (c - 128)      )

							return img.point(UpperCamelCase__      )


if __name__ == "__main__":
					# Load image
					with Image.open("""image_data/lena.jpg""") as img:
										# Change contrast to 170
										_UpperCAmelCase		:   Tuple										=       change_contrast(img, 170)
										cont_img.save("""image_data/lena_high_contrast.png""", format="""png""")




