mmunion - Union of images.

Synopsis: y = mmunion( f1, f2, f3, f4, f5 )

Input: f1: Gray-scale (uint8 or uint16) or binary image (logical uint8).; f2: Gray-scale (uint8 or uint16) or binary image (logical uint8). Or constant; f3: Gray-scale (uint8 or uint16) or binary image (logical uint8). Or constant. Default: No parameter.; f4: Gray-scale (uint8 or uint16) or binary image (logical uint8). Or constant. Default: No parameter.; f5: Gray-scale (uint8 or uint16) or binary image (logical uint8). Or constant. Default: No parameter.; Obs: f1, f2, f3, f4, f5 must have the same data type.

Output: y: Gray-scale (uint8 or uint16) or binary image (logical uint8).

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,uint8(255))

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)

Binary with gray-scale image:

d = mmbinary(mmreadgray('pcb1bin.tif'));
Warning: Converting image from binary uint8 to uint8.
e = mmreadgray('danaus.tif');
f = mmunion(mmgray(d),e);
mmshow(d);
mmshow(e);
mmshow(f);

(d)

(e)

(f)

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:

equation

generalized union:

equation

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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