mmregmax - Regional Maximum.

Synopsis

y = mmregmax( f, Bc )

Input

f: Gray-scale (uint8 or uint16) image.

Bc: Structuring element. (connectivity). Default: Elementary cross (mmsecross).

Output

y: Binary image (logical uint8).

Description

mmregmax creates a binary image y by computing the regional maxima of f, according to the connectivity defined by the structuring element Bc.

Examples

Numerical example:

a = uint8([... 5 10 10 10 10 10 10;... 5 9 6 18 6 5 10;... 5 9 6 18 6 8 7;... 5 9 9 15 9 7 10;... 5 9 9 15 12 10 10;... 5 5 5 5 10 10 10]); b = mmregmax(a) b = 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 c = mmregmax(a,mmsebox) c = 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Gray-scale image:

f=mmreadgray('astablet.tif'); y1=mmregmax(f); f2=mmopen(f,mmsedisk(20)); y2=mmregmax(f2); mmshow(f); mmshow(y1); mmshow(f2); mmshow(y2); (f) (y1) (f2) (y2)

Equation

Algorithm

function y=mmregmax_equ( f, bc)
 if (isa(f,'uint8'))
   k = 255;
 else
   k = 65535;
 fplus = mmaddm(f,1);
 g = mmsubm(fplus,mminfrec(f,fplus,bc));
 y = mmunion(mmthreshad(g,1),mmthreshad(f,k)); 

See Also

mmfreedom - Control automatic data type conversion.

mmregmin - Regional Minimum (with generalized dynamics).

mmsebox - Create a box structuring element.

mmsecross - Cross structuring element.

[Top] [Up] [Prev] [Next]	[Up] [Basic Concepts] [Demonstrations] [Functions]
Copyright (c) 1998-2002 by SDC Information Systems