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morphological_operations.py
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morphological_operations.py
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import numpy as np
from scipy.ndimage import binary_erosion, binary_dilation
import matplotlib.pyplot as plt
horizontalAndVertical = np.array([
[0, 1, 0],
[1, 1, 1],
[0, 1, 0]
])
allDirections = np.array([
[1, 1, 1],
[1, 1, 1],
[1, 1, 1]
])
def erode(arr, structure):
return binary_erosion(arr, structure)
def dilate(arr, structure):
return binary_dilation(arr, structure)
def close(arr, structure):
return erode(dilate(arr, structure), structure)
def open(arr, structure):
return dilate(erode(arr, structure), structure)
def plot(arr):
arr = np.ones(arr.shape) - arr
plt.imshow(arr, plt.cm.get_cmap("Greys"))
plt.show()
def main():
I = np.array([
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 1, 0, 1, 1, 1, 0, 0],
[0, 0, 0, 0, 1, 1, 1, 0, 0],
[0, 0, 1, 1, 0, 1, 1, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0]
])
plot(I)
plot(dilate(erode(I, horizontalAndVertical), horizontalAndVertical))
plot(erode(dilate(I, allDirections), allDirections))
if __name__ == "__main__":
main()