[Octave-bug-tracker] [bug #51982] [octave forge] (image) Failing unit test for nlfilter

[Rafael Laboissiere]

URL:
  <http://savannah.gnu.org/bugs/?51982>

                 Summary: [octave forge] (image) Failing unit test for
nlfilter
                 Project: GNU Octave
            Submitted by: rlaboiss
            Submitted on: Sun 10 Sep 2017 04:29:58 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  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:

The following unit test for function nlfilter in package image is failing
randomly:


%!test
%! a = randi (10, 15, 15, 4, 8, 3);
%! assert (nlfilter (a, [3 4 7 5], @(x) max(x(:))),
%!         imdilate (a, ones ([3 4 7 5])))


This is a way of triggering the bug:


octave:1> pkg load image
octave:2> while 1
octave:3>   a = randi (10, 15, 15, 4, 8, 3);
octave:4>   assert (nlfilter (a, [3 4 7 5], @(x) max(x(:))),
octave:5>           imdilate (a, ones ([3 4 7 5])))
octave:6> endwhile
error: ASSERT errors for:  assert (nlfilter (a, [3, 4, 7, 5], @(x) max (x
(:))),imdilate (a, ones ([3, 4, 7, 5])))

  Location  |  Observed  |  Expected  |  Reason
(1,1,1,7,1)       10           9         Abs err 1 exceeds tol 0
(1,1,2,7,1)       10           9         Abs err 1 exceeds tol 0
(1,1,3,7,1)       10           9         Abs err 1 exceeds tol 0
(1,1,4,7,1)       10           9         Abs err 1 exceeds tol 0
(1,1,1,8,1)       10           9         Abs err 1 exceeds tol 0
(1,1,2,8,1)       10           9         Abs err 1 exceeds tol 0
(1,1,3,8,1)       10           9         Abs err 1 exceeds tol 0
(1,1,4,8,1)       10           9         Abs err 1 exceeds tol 0






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