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Fix greyscale computation and inverted coords

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This commit is contained in:
Colin Leroy-Mira 2023-07-29 16:15:52 +02:00
parent 0ef9306976
commit af92097a91
1 changed files with 3 additions and 3 deletions
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6
digital_image_processing/dithering/burkes.py
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@ -41,7 +41,7 @@ class Burkes:
>>> Burkes.get_greyscale(3, 4, 5)
3.753
"""
return 0.114 * blue + 0.587 * green + 0.2126 * red
return 0.114 * blue + 0.587 * green + 0.299 * red
def process(self) -> None:
for y in range(self.height):
@ -49,10 +49,10 @@ class Burkes:
greyscale = int(self.get_greyscale(*self.input_img[y][x]))
if self.threshold > greyscale + self.error_table[y][x]:
self.output_img[y][x] = (0, 0, 0)
current_error = greyscale + self.error_table[x][y]
current_error = greyscale + self.error_table[y][x]
else:
self.output_img[y][x] = (255, 255, 255)
current_error = greyscale + self.error_table[x][y] - 255
current_error = greyscale + self.error_table[y][x] - 255
"""
Burkes error propagation (`*` is current pixel):