mmcdil

mmcdil
Dilate an image conditionally.

Synopsis

y = mmcdil( f, g, b = None, n = 1 )

Implemented in Python.

Input

f	Image Gray-scale (uint8 or uint16) or binary image.
g	Image Gray-scale (uint8 or uint16) or binary image. Conditioning image.
b	Structuring Element Default: `None` (3x3 elementary cross)
n	Double Non-negative integer. (number of iterations). Default: `1`

Output

Image

Description

mmcdil creates the image y by dilating the image f by the structuring element b conditionally to the image g. This operator may be applied recursively n times.

Examples

Numerical examples:

>>> f = mmbinary(uint8([[1, 0, 0, 0, 0, 0, 0],\
    [0, 0, 0, 0, 0, 0, 0],\
    [0, 0, 0, 0, 1, 0, 0,]]))

>>> g = mmbinary(uint8([[1, 1, 1, 0, 0, 1, 1],\
    [1, 0, 1, 1, 1, 0, 0],\
    [0, 0, 0, 0, 1, 0, 0]]));

>>> y1=mmcdil(f,g,mmsecross())

>>> y2=mmcdil(f,g,mmsecross(),3)

>>> f = uint8([\
    [   0,    0,   0,   80,   0,   0],\
    [   0,    0,   0,    0,   0,   0],\
    [  10,   10,   0,  255,   0,   0]])

>>> g = uint8([\
    [   0,    1,   2,   50,   4,   5],\
    [   2,    3,   4,    0,   0,   0],\
    [  12,  255,  14,   15,  16,  17]])

>>> y1=mmcdil(f,g,mmsecross())

>>> y2=mmcdil(f,g,mmsecross(),3)

Binary image:

>>> g=mmreadgray('pcb1bin.tif')

>>> f=mmframe(g,5,5)

>>> y5=mmcdil(f,g,mmsecross(),5)

>>> y25=mmcdil(f,g,mmsecross(),25)

>>> mmshow(g)

>>> mmshow(g,f)

>>> mmshow(g,y5)

>>> mmshow(g,y25)


g	g,f


g,y5	g,y25

Gray-scale image:

>>> g=mmneg(mmreadgray('n2538.tif'))

>>> f=mmintersec(g,0)

Warning: Converting input image from int32 to uint8.

>>> f=mmdraw(f,'LINE:40,30,60,30:END')

>>> y1=mmcdil(f,g,mmsebox())

>>> y30=mmcdil(f,g,mmsebox(),30)

>>> mmshow(g)

>>> mmshow(f)

>>> mmshow(y1)

>>> mmshow(y30)


g	f	y1	y30

Equation

Source Code

def mmcdil(f, g, b=None, n=1):
    if b is None: b = mmsecross()
    y = mmintersec(f,g)
    for i in range(n):
        aux = y
        y = mmintersec(mmdil(y,b),g)
        if mmisequal(y,aux): break
    return y

mmfreedom	Control automatic data type conversion.
mmdil	Dilate an image by a structuring element.
mmsebox	Create a box structuring element.
mmsecross	Diamond structuring element and elementary 3x3 cross.
mmimg2se	Create a structuring element from a pair of images.
mminfrec	Inf-reconstruction.

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

mmcdil Dilate an image conditionally.