Color a black/white .tif image with 3 colors

Python
,
3

or simply numpy:

assert input.shape == (height, width) # single channel

output = np.zeros((height, width, 3), dtype=np.uint8)

output[(input <= 50)] = (255,0,255)
output[(input > 100) & (input <= 150)] = (255,255,0)
output[(input > 200)] = (0,255,255)

always work through the documentation and tutorials of the technologies you use. numpy is a part of that.

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