change_brightness.py

fromPILimportImage


defchange_brightness(img: Image, level: float) ->Image:
"""
 Change the brightness of a PIL Image to a given level.
 """

defbrightness(c: int) ->float:
"""
 Fundamental Transformation/Operation that'll be performed on
 every bit.
 """
return128+level+ (c-128)

ifnot-255.0<=level<=255.0:
raiseValueError("level must be between -255.0 (black) and 255.0 (white)")
returnimg.point(brightness)


if__name__=="__main__":
# Load image
withImage.open("image_data/lena.jpg") asimg:
# Change brightness to 100
brigt_img=change_brightness(img, 100)
brigt_img.save("image_data/lena_brightness.png", format="png")