[Octave-bug-tracker] [bug #41851] ind2rgb tests

[Guillaume]

URL:
  <http://savannah.gnu.org/bugs/?41851>

                 Summary: ind2rgb tests
                 Project: GNU Octave
            Submitted by: gyom
            Submitted on: Thu 13 Mar 2014 12:30:44 PM GMT
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: Guillaume
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

The tests for ind2rgb return a different output in MATLAB for floating point
inputs: (using variables from scripts/image/ind2rgb.m)


>> [rgb] = ind2rgb (double(img), map)
rgb(:,:,1) =
         0    0.4000    0.3000
    0.2000         0    0.3000
         0         0    0.4000
rgb(:,:,2) =
         0    0.4000    0.7000
    0.4000         0    0.7000
         0         0    0.4000
rgb(:,:,3) =
         0    0.5000    1.0000
    0.6000         0    1.0000
         0         0    0.5000


while Octave expects an error.
The other tests in "Test input validation" that do not return an error are:

>> ind2rgb (sparse (1), jet (64))
ans(:,:,1) =
     0
ans(:,:,2) =
     0
ans(:,:,3) =
    0.5625
>> ind2rgb (0, jet (64))
ans(:,:,1) =
     0
ans(:,:,2) =
     0
ans(:,:,3) =
    0.5625
>> ind2rgb (1, ones (2,2,2))
ans(:,:,1) =
     1
ans(:,:,2) =
     1
ans(:,:,3) =
     1
>> ind2rgb (1, ones (2,4))
ans(:,:,1) =
     1
ans(:,:,2) =
     1
ans(:,:,3) =
     1





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