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* Create change_brightness.py * Update change_brightness.py * Update change_brightness.py * Update change_brightness.py * Update change_brightness.py Co-authored-by: Christian Clauss <cclauss@me.com>
27 lines
751 B
Python
27 lines
751 B
Python
from PIL import Image
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def change_brightness(img: Image, level: float) -> Image:
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"""
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Change the brightness of a PIL Image to a given level.
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"""
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def brightness(c: int) -> float:
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"""
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Fundamental Transformation/Operation that'll be performed on
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every bit.
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"""
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return 128 + level + (c - 128)
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if not -255.0 <= level <= 255.0:
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raise ValueError("level must be between -255.0 (black) and 255.0 (white)")
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return img.point(brightness)
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if __name__ == "__main__":
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# Load image
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with Image.open("image_data/lena.jpg") as img:
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# Change brightness to 100
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brigt_img = change_brightness(img, 100)
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brigt_img.save("image_data/lena_brightness.png", format="png")
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