[Octave-bug-tracker] [bug #41186] image: fspecial disk is not matlab compatible

[Carnë Draug]

URL:
  <http://savannah.gnu.org/bugs/?41186>

                 Summary: image: fspecial disk is not matlab compatible
                 Project: GNU Octave
            Submitted by: carandraug
            Submitted on: Fri 10 Jan 2014 13:16:04 GMT
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: other
        Operating System: Any

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Details:

Octave's fspecial disk shape, returns a disk shaped filter for average, where
all have the same value. However, the Matlab disk is slightly different, where
the borders are slightly lower (pillbox).


>> a = fspecial ('disk')

a =

         0         0         0    0.0012    0.0050    0.0063    0.0050   
0.0012         0         0         0
         0    0.0000    0.0062    0.0124    0.0127    0.0127    0.0127   
0.0124    0.0062    0.0000         0
         0    0.0062    0.0127    0.0127    0.0127    0.0127    0.0127   
0.0127    0.0127    0.0062         0
    0.0012    0.0124    0.0127    0.0127    0.0127    0.0127    0.0127   
0.0127    0.0127    0.0124    0.0012
    0.0050    0.0127    0.0127    0.0127    0.0127    0.0127    0.0127   
0.0127    0.0127    0.0127    0.0050
    0.0063    0.0127    0.0127    0.0127    0.0127    0.0127    0.0127   
0.0127    0.0127    0.0127    0.0063
    0.0050    0.0127    0.0127    0.0127    0.0127    0.0127    0.0127   
0.0127    0.0127    0.0127    0.0050
    0.0012    0.0124    0.0127    0.0127    0.0127    0.0127    0.0127   
0.0127    0.0127    0.0124    0.0012
         0    0.0062    0.0127    0.0127    0.0127    0.0127    0.0127   
0.0127    0.0127    0.0062         0
         0    0.0000    0.0062    0.0124    0.0127    0.0127    0.0127   
0.0124    0.0062    0.0000         0
         0         0         0    0.0012    0.0050    0.0063    0.0050   
0.0012         0         0         0






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