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master
digital_image_processing/change_contrast.py
35 строк
834 B
Christian Clauss
Replace flake8 with ruff (#8184)
16 мар 2023, 15:31
Не верифицирован
16 мар 2023, 15:31
521fbca
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""" Changing contrast with PIL This algorithm is used in https://noivce.pythonanywhere.com/ Python web app. psf/black: True ruff : True """ from PIL import Image def change_contrast(img: Image, level: int) -> Image: """ Function to change contrast """ factor = (259 * (level + 255)) / (255 * (259 - level)) def contrast(c: int) -> int: """ Fundamental Transformation/Operation that'll be performed on every bit. """ return int(128 + factor * (c - 128)) return img.point(contrast) if __name__ == "__main__": # Load image with Image.open("image_data/lena.jpg") as img: # Change contrast to 170 cont_img = change_contrast(img, 170) cont_img.save("image_data/lena_high_contrast.png", format="png")