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Add reference to the greyscaling formula

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Colin Leroy-Mira 2023-07-29 18:55:27 +02:00
parent 9e53e23261
commit e5dfb1890e
1 changed files with 5 additions and 0 deletions
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digital_image_processing/dithering/burkes.py
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@ -45,6 +45,11 @@ class Burkes:
>>> Burkes.get_greyscale(255, 255, 255) >>> Burkes.get_greyscale(255, 255, 255)
255.0 255.0
""" """
"""
Formula from https://en.wikipedia.org/wiki/HSL_and_HSV
cf Lightness section, and Fig 13c.
We use the first of four possible.
"""
return 0.114 * blue + 0.587 * green + 0.299 * red return 0.114 * blue + 0.587 * green + 0.299 * red
def process(self) -> None: def process(self) -> None: