[mmsymdif] [Up] [mmimg2se] Operations

mmunion
Union of images.

Synopsis

function y = mmunion ( f1 , f2 , f3 , f4 , f5 )

Input

f1 Image Gray-scale (uint8 or uint16) or binary image
f2 Image Gray-scale (uint8 or uint16) or binary image

Or constant
f3 Image Gray-scale (uint8 or uint16) or binary image

Default: NULL

Or constant.
f4 Image Gray-scale (uint8 or uint16) or binary image

Default: NULL

Or constant.
f5 Image Gray-scale (uint8 or uint16) or binary image

Default: NULL

Or constant.

Output

y Image

Description

mmunion creates the image y by taking the pixelwise maximum between the images f1, f2, f3, f4, and f5. When f1, f2, f3, f4, and f5 are binary images, y represents the union of them.

Examples

Numerical example:
f=uint8([255   255    0   10    0   255   250]);

g=uint8([ 0    40   80   140  250    10    30]);

y1=mmunion(f,g)

y1 =
  255  255   80  140  250  255  250

y2=mmunion(f, 255)

Warning: converting image from scalar to uint8
y2 =
  255  255  255  255  255  255  255
Binary image
a = mmreadgray('form-ok.tif');

b = mmreadgray('form-1.tif');

c = mmunion(a,b);

mmshow(a); 

mmshow(b); 

mmshow(c);
a b
c
Gray scale image:
g = mmreadgray('tplayer1.tif');

h = mmreadgray('tplayer2.tif');

i = mmreadgray('tplayer3.tif');

j = mmunion(g,h,i);

mmshow(g); 

mmshow(h); 

mmshow(i); 

mmshow(j);
g h i
j

Equation

union:
generalized union:

Algorithm

function g = mmunion_equ(f1, f2)
g = max(f1,f2);

See also

mmfreedom Control automatic data type conversion.
mmintersec Intersection of images.
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