[mmsubm] [Up] [mmunion] Operations

mmsymdif
Symmetric difference between two images

Synopsis

y = mmsymdif( f1, f2 )

Implemented in Python.

Input

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

Output

y Image

i

Description

mmsymdif creates the image y by taken the union of the subtractions of f1 from f2 and f2 from f1. When f1 and f2 are binary images, y represents the set of points that are in f1 and not in f2 or that are in f2 and not in f1 .

Examples

Gray scale image:
>>> a = uint8([1, 2, 3, 4, 5])

              
>>> b = uint8([5, 4, 3, 2, 1])

              

              
>>> print mmsymdif(a,b)

              
[4 2 0 2 4]

            

          

          

            

              
>>> c = mmreadgray('tplayer1.tif')

              

              
>>> d = mmreadgray('tplayer2.tif')

              

              
>>> e = mmsymdif(c,d)

              

              
>>> mmshow(c)

              

              
>>> mmshow(d)

              

              
>>> mmshow(e)

              

            

            

              
                

                  
                  
                  
                  
                

                

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Equation

      

        

          

            
          

        

      

    

    

      
Source Code

      

        
def mmsymdif(f1, f2):
    y = mmunion(mmsubm(f1,f2),mmsubm(f2,f1))
    return y
    

      

    

    

      
See also

      

        

          
            

              mmfreedom
              Control automatic data type conversion.
            

          
        

      

    

    

      
See also

      

        

          
            

              mmfreedom
              Control automatic data type conversion.
            

            

              mmsubm
              Subtraction of two images, with saturation.
            

            

              mmunion
              Union of images.
            

          
        

      

    

    

      

        

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