digital_image_processing.change_brightness

Attributes

brigt_img

Functions

change_brightness(→ PIL.Image.Image)

Change the brightness of a PIL Image to a given level.

Module Contents

digital_image_processing.change_brightness.change_brightness(img: PIL.Image.Image, level: float) → PIL.Image.Image

Change the brightness of a PIL Image to a given level.

Args:

img: PIL Image to adjust level: Brightness level adjustment (-255.0 to 255.0)

Negative values darken, positive values brighten

Returns:

New PIL Image with adjusted brightness

Raises:

ValueError: If level is not in range [-255.0, 255.0]

>>> from PIL import Image
>>> import numpy as np
>>> img = Image.new('RGB', (2, 2), color=(100, 100, 100))
>>> bright = change_brightness(img, 50)
>>> px = bright.load()
>>> px[0, 0]
(150, 150, 150)
>>> dark = change_brightness(img, -50)
>>> px_dark = dark.load()
>>> px_dark[0, 0]
(50, 50, 50)
>>> change_brightness(img, 300)
Traceback (most recent call last):
    ...
ValueError: level must be between -255.0 (black) and 255.0 (white)

digital_image_processing.change_brightness.brigt_img