| 1234567891011121314151617181920212223242526272829303132333435 |
- """
- Changing contrast with PIL
- This algorithm is used in
- https://noivce.pythonanywhere.com/ python web app.
- python/black: True
- flake8 : True
- """
- from PIL import Image
- def change_contrast(img: Image, level: float) -> Image:
- """
- Function to change contrast
- """
- factor = (259 * (level + 255)) / (255 * (259 - level))
- def contrast(c: int) -> float:
- """
- Fundamental Transformation/Operation that'll be performed on
- every bit.
- """
- return 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")
|
