FilesExpand file tree

master

/

mean_threshold.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

30 lines (24 loc) · 734 Bytes

master

/

mean_threshold.py

Copy path

Top

File metadata and controls

• Code
• Blame

30 lines (24 loc) · 734 Bytes

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

from PIL import Image

"""

Mean thresholding algorithm for image processing

https://en.wikipedia.org/wiki/Thresholding_(image_processing)

"""

def mean_threshold(image: Image) -> Image:

"""

image: is a grayscale PIL image object

"""

height, width = image.size

mean = 0

pixels = image.load()

for i in range(width):

for j in range(height):

pixel = pixels[j, i]

mean += pixel

mean //= width * height

for j in range(width):

for i in range(height):

pixels[i, j] = 255 if pixels[i, j] > mean else 0

return image

if __name__ == "__main__":

image = mean_threshold(Image.open("path_to_image").convert("L"))

image.save("output_image_path")