Python/computer_vision/meanthreshold.py
Tanay Karve fc98961814
Hacktoberfest 2020: Added computer vision algorithm ()
* Create meanthresholding.py

* Rename meanthresholding.py to meanthreshold.py

* Update meanthreshold.py

* Update computer_vision/meanthreshold.py

Verified this part works, thanks.

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update computer_vision/meanthreshold.py

Co-authored-by: Christian Clauss <cclauss@me.com>

Co-authored-by: Christian Clauss <cclauss@me.com>
2020-10-16 15:15:20 +02:00

31 lines
734 B
Python

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")