python keep only black colors in image code example
Example 1: find all color in image python
>>> from PIL import Image
>>> im = Image.open('polar-bear-cub.jpg')
>>> from collections import defaultdict
>>> by_color = defaultdict(int)
>>> for pixel in im.getdata():
... by_color[pixel] += 1
>>> by_color
defaultdict(<type 'int'>, {(11, 24, 41): 8, (53, 52, 58): 8, (142, 147, 117): 1, (121, 111, 119): 1, (234, 228, 216): 4
Example 2: python image black and white
from PIL import Image
img = Image.open("image.jpg")
img.convert("1").save("result.jpg")