mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-11-30 16:31:08 +00:00
71b458cefe
* Rename harriscorner.py to harris_corner.py
* updating DIRECTORY.md
* Rename meanthreshold.py to mean_threshold.py
* updating DIRECTORY.md
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
31 lines
734 B
Python
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")
|