[OctDev] imrotate.m

[Todd N. <to...@gm...>]

Hello,

I made a change where I round the corners matrix.  In the tests that I
performed it seems to provide for better rotations.  I also modified
the special cases so that it doesn't rely on rot90, etc.

octave:160> a
a =

   1   2   3   4   5
   6   7   8   9  10
  11  12  13  14  15
  16  17  18  19  20
  21  22  23  24  25

Pre Patch: 

octave:161> imrotate(a,45)
ans =

   0   0   0   4  10   0   0   0
   0   0   3   9   9  15   0   0
   0   2   7   8  14  19  20   0
   0   6   7  12  18  19  24   0
   0   0  11  17  17  23   0   0
   0   0   0  16  22   0   0   0

Post Patch:

octave:162> imrotate(a,45)
ans =

   0   0   4   5  10   0   0
   0   3   3   9  15  15   0
   1   2   8  13  14  20  25
   1   6  12  13  18  24  25
   0  11  11  17  23  23   0
   0   0  16  21  22   0   0


Todd