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mmopen
Morphological opening.

Synopsis

function y = mmopen ( f , b )

Input

f Image Gray-scale (uint8 or uint16) or binary image
b Structuring Element

Default: 3x3 elementary cross

Output

y Image

Description

mmopen creates the image y by the morphological opening of the image f by the structuring element b. In the binary case, the opening by the structuring element B may be interpreted as the union of translations of B included in f. In the gray-scale case, there is a similar interpretation taking the functions umbra.

Examples

f=mmbinary(mmreadgray('blob.tif'));

bimg=mmbinary(mmreadgray('blob1.tif'));

b=mmimg2se(bimg);

mmshow(f);

mmshow(mmopen(f,b));

mmshow(mmopen(f,b),mmgradm(f));
f mmopen(f,b)
mmopen(f,b),mmgradm(f) 
a=mmbinary(mmreadgray('pcb1bin.tif'));

b=mmopen(a,mmsebox(2));

c=mmopen(a,mmsebox(4));

mmshow(a);

mmshow(b);

mmshow(c);
a b
c 
a=mmreadgray('astablet.tif');

b=mmopen(a,mmsedisk(18));

mmshow(a);

mmshow(b);
a b

Equation

Algorithm

function y=mmopen_equ( f, b )
  y = mmdil(mmero(f,b),b);

See also

mmclose Morphological closing.
mmfreedom Control automatic data type conversion.
mmimg2se Create a structuring element from a pair of images.
mmsebox Create a box structuring element.
mmsecross Diamond structuring element and elementary 3x3 cross.
mmareaopen Area opening
mmsesum N-1 iterative Minkowski additions
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