[mmdil] [Up] [mmcenter] | Dilations And Erosions |
Implemented in Python.
f | Image Gray-scale (uint8 or uint16) or binary image. |
b | Structuring Element Default:
|
y | Image |
mmero performs the erosion of the image
f
by the structuring element
b
. Erosion is a neighbourhood operator that compairs locally
b
with
f
, according to an inclusion rule. Since erosion is a fundamental operator to the construction of all other morphological operators, it is also called an elementary operator of Mathematical Morphology. When
f
is a gray-scale image ,
b
may be a flat or non-flat structuring element.
>>> f=mmbinary([ [1, 1, 1, 0, 0, 1, 1], [1, 0, 1, 1, 1, 0, 0], [0, 0, 0, 0, 1, 0, 0]])
>>> b=mmbinary([1, 1, 0])
>>> mmero(f,b)
array([[1, 1, 1, 0, 0, 0, 1], [1, 0, 0, 1, 1, 0, 0], [0, 0, 0, 0, 0, 0, 0]],'1')
>>> f=uint8([ [ 0, 1, 2, 50, 4, 5], [ 2, 3, 4, 0, 0, 0], [12, 255, 14, 15, 16, 17]])
>>> mmero(f,b)
array([[ 0, 0, 1, 2, 4, 4], [ 2, 2, 3, 0, 0, 0], [12, 12, 14, 14, 15, 16]],'b')
>>> f=mmbinary(mmreadgray('blob.tif'))
>>> bimg=mmbinary(mmreadgray('blob1.tif'))
>>> b=mmimg2se(bimg)
>>> g=mmero(f,b)
>>> mmshow(f)
>>> mmshow(g)
>>> mmshow(g,mmgradm(f))
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|
f | g |
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|
g,mmgradm(f) |
>>> f=mmreadgray('pcb_gray.tif')
>>> b=mmsedisk(3)
>>> mmshow(f)
>>> mmshow(mmero(f,b))
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|
f | mmero(f,b) |
def mmero(f, b=None): if b is None: b = mmsecross() y = mmneg(mmdil(mmneg(f),mmsereflect(b))) return y
mmfreedom | Control automatic data type conversion. |
mmdil | Dilate an image by a structuring element. |
mmimg2se | Create a structuring element from a pair of images. |
mmsebox | Create a box structuring element. |
mmsecross | Diamond structuring element and elementary 3x3 cross. |
mmcero | Erode an image conditionally. |
mmdist | Distance transform. |
mmsesum | N-1 iterative Minkowski additions |
[mmdil] [Up] [mmcenter] | ![]() |
Copyright (c) 2003, Roberto A. Lotufo, UNICAMP-University of Campinas; Rubens C. Machado, CenPRA-Renato Archer Research Center. |