[mmclohole] [Up] [mmareaopen] Connected Operators

mmareaclose
Area closing

Synopsis

y = mmareaclose( f, a, Bc = None )

Implemented in Python.

Input

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

Double

non negative integer.

Structuring Element

( connectivity).

Default: None (3x3 elementary cross)

Output

y	Image Same type of `f`

Description

mmareaclose removes any pore (i.e., background connected component) with area less than a of a binary image f. The connectivity is given by the structuring element Bc. This operator is generalized to gray-scale images by applying the binary operator successively on slices of f taken from higher threshold levels to lower threshold levels.

Examples

Binary image:

>>> a=mmreadgray('form-1.tif')

>>> b=mmareaclose(a,400)

>>> mmshow(a)

>>> mmshow(b)


a	b

Gray-scale image:

>>> a=mmreadgray('n2538.tif')

>>> b=mmareaclose(a,400)

>>> mmshow(a)

>>> mmshow(b)


a	b

Equation

Limitations

The structuring elements allowed are the elementary cross (4-connected) and the elementary box (8-connected).

Source Code
        def mmareaclose(f, a, Bc=None):
    if Bc is None: Bc = mmsecross()
    y = mmneg(mmareaopen(mmneg(f),a,Bc))
    return y
    
      

mmareaopen	Area opening
mmlabel	Label a binary image.
mmsebox	Create a box structuring element.
mmsecross	Diamond structuring element and elementary 3x3 cross.
mmfreedom	Control automatic data type conversion.
mmclohole	Close holes of binary and gray-scale images.
mmregmin	Regional Minimum (with generalized dynamics).

[`mmclohole`] [Up] [`mmareaopen`]
Copyright (c) 2003, Roberto A. Lotufo, UNICAMP-University of Campinas; Rubens C. Machado, CenPRA-Renato Archer Research Center.

mmareaclose Area closing