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grasses/HPF.py

Created November 19, 2019 11:45
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High-Pass Filter
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HPF.py
import numpy as np, scipy
def high_pass_filter(image):
kernel_5x5 = (1.0/12) * np.array([
[-1, 2, -2, 2, -1],
[2, -6, 8, -6, 2],
[-2, 8, -12, 8, -2],
[2, -6, 8, -6, 2],
[-1, 2, -2, 2, -1]
], dtype=np.float32)
return scipy.ndimage.convolve(image, kernel_5x5)
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