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Add default structuring element to morphology

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Nelson Brown
2014-07-11 13:50:55 -07:00
parent 1c27a97d26
commit bb732c9225
5 changed files with 124 additions and 13 deletions
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skimage/morphology/binary.py
+15 -4
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@@ -1,9 +1,10 @@
import warnings
import numpy as np
from scipy import ndimage
from .selem import _default_selem
def binary_erosion(image, selem, out=None):
def binary_erosion(image, selem=None, out=None):
"""Return fast binary morphological erosion of an image.
This function returns the same result as greyscale erosion but performs
@@ -29,6 +30,11 @@ def binary_erosion(image, selem, out=None):
The result of the morphological erosion with values in ``[0, 1]``.
"""
# Default structure element
if selem is None:
selem = _default_selem(image.ndim)
selem = (selem != 0)
selem_sum = np.sum(selem)
@@ -45,7 +51,7 @@ def binary_erosion(image, selem, out=None):
return np.equal(conv, selem_sum, out=out)
def binary_dilation(image, selem, out=None):
def binary_dilation(image, selem=None, out=None):
"""Return fast binary morphological dilation of an image.
This function returns the same result as greyscale dilation but performs
@@ -72,6 +78,11 @@ def binary_dilation(image, selem, out=None):
The result of the morphological dilation with values in ``[0, 1]``.
"""
# Default structure element
if selem is None:
selem = _default_selem(image.ndim)
selem = (selem != 0)
if np.sum(selem) <= 255:
@@ -87,7 +98,7 @@ def binary_dilation(image, selem, out=None):
return np.not_equal(conv, 0, out=out)
def binary_opening(image, selem, out=None):
def binary_opening(image, selem=None, out=None):
"""Return fast binary morphological opening of an image.
This function returns the same result as greyscale opening but performs
@@ -119,7 +130,7 @@ def binary_opening(image, selem, out=None):
return out
def binary_closing(image, selem, out=None):
def binary_closing(image, selem=None, out=None):
"""Return fast binary morphological closing of an image.
This function returns the same result as greyscale closing but performs