mmlastero - Last erosion.

Synopsis

y = mmlastero( f, B )

Input

f: Binary image (logical uint8).

B: Structuring element. Default: Elementary cross (mmsecross).

Output

y: Binary image (logical uint8).

Description

mmlastero creates the image y by computing the last erosion by the structuring element B of the image f. The objects found in y are the objects of the erosion by nB that can not be reconstructed from the erosion by (n+1)B, where n is a generic non negative integer. The image y is a proper subset of the morphological skeleton by B of f.

Examples

a=mmbinary(mmreadgray('blob3.tif')); Warning: Converting image from binary uint8 to uint8. b=mmlastero(a); mmshow(a); mmshow(b); (a) (b)

Equation

Algorithm

function y=mmlastero(f, b)
  y = mmframe(f);
  y = mmero(y,mmsebox);
  mark = mmero(f,b);
  mask = f;
  y = mmunion(y,mmsubm(mask,mminfrec(mark,mask,nb)));
  mask = mark;
  for i=2:length(f)
    nb = mmsesum(b,i);
    mark = mmero(f,nb);
    y = mmunion(y,mmsubm(mask,mminfrec(mark,mask,nb)));
    mask = mark;
  end; 

See Also

mmcbisector - N-Conditional bisector.

mmfreedom - Control automatic data type conversion.

mmregmax - Regional Maximum.

mmskelm - Morphological skeleton (Medial Axis Transform).

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