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Fix morphological open/close for square structuring elements with even sides.

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This also fixes rectangular selems with even sides, but not rectangular selems with one odd and one even side.
This commit is contained in:
Tony S Yu
2011-10-15 03:34:30 -04:00
parent fb92bfcf71
commit ac2714d3c8
1 changed files with 12 additions and 2 deletions
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scikits/image/morphology/grey.py
+12 -2
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@@ -105,8 +105,13 @@ def greyscale_open(image, selem, out=None):
opening : ndarray
The result of the morphological opening.
"""
h, w = selem.shape
if (h % 2) == 0 and (w % 2) == 0:
flip = True
else:
flip = False
eroded = greyscale_erode(image, selem)
out = greyscale_dilate(eroded, selem, out=out)
out = greyscale_dilate(eroded, selem, out=out, flip=flip)
return out
def greyscale_close(image, selem, out=None):
@@ -131,8 +136,13 @@ def greyscale_close(image, selem, out=None):
opening : ndarray
The result of the morphological opening.
"""
h, w = selem.shape
if (h % 2) == 0 and (w % 2) == 0:
flip = True
else:
flip = False
dilated = greyscale_dilate(image, selem)
out = greyscale_erode(dilated, selem, out=out)
out = greyscale_erode(dilated, selem, out=out, flip=flip)
return out
def greyscale_white_top_hat(image, selem, out=None):