[mmflood] [Up] [mmcloserec] Connected Operators

mmasfrec
Reconstructive Alternating Sequential Filtering

Synopsis

function y = mmasfrec ( f , SEQ , b , bc , n )

Input

f Image Gray-scale (uint8 or uint16) or binary image
SEQ String

Default: 'OC'

Values: "OC" or "CO".
b Structuring Element

Default: 3x3 elementary cross
bc Structuring Element

Default: 3x3 elementary cross
n Double Non-negative integer.

Default: 1

(number of iterations).

Output

y Image

Same type of f

Description

mmasf creates the image y by filtering the image f by n iterations of the close by reconstruction and open by reconstruction alternating sequential filter characterized by the structuring element b. The structure element bc is used in the reconstruction. The sequence of opening and closing is controlled by the parameter SEQ. 'OC' performs opening after closing, and 'CO' performs closing after opening.

Examples

f=mmreadgray('fabric.tif');

g=mmasfrec(f,'oc',mmsecross,mmsecross,3);

mmshow(f);

mmshow(g);
f g

Equation

Case oc, reconstructive close-open filter:
Case co, reconstructive open-close filter:

Algorithm

function y=mmasfrec_equ( f, SEQ, b, bc, n )
 switch SEQ
 case 'OC',
   y = f;
   for i=1:n
      nb = mmsesum(b,i);
      y = mmcloserec(y,nb,bc);
      y = mmopenrec(y,nb,bc);
   end;
 case 'CO',
   y = f;
   for i=1:n
      nb = mmsesum(b,i);
      y = mmopenrec(y,nb,bc);
      y = mmcloserec(y,nb,bc);
   end;
 end;

See also

mmasf Alternating Sequential Filtering
mmsebox Create a box structuring element.
mmsecross Diamond structuring element and elementary 3x3 cross.
mmopenrec Opening by reconstruction.
mmcloserec Closing by reconstruction.
mmfreedom Control automatic data type conversion.
[mmflood] [Up] [mmcloserec]
Copyright (c) 1998-2008 by SDC Information Systems