[Octave-bug-tracker] [bug #47506] rgb2ind creates colormap incompartible to ind2rgb

[Daniel Roeske]

URL:
  <http://savannah.gnu.org/bugs/?47506>

                 Summary: rgb2ind creates colormap incompartible to ind2rgb
                 Project: GNU Octave
            Submitted by: dmjr
            Submitted on: Mi 23 Mär 2016 08:33:45 GMT
                Category: Libraries
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Crash
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.0
        Operating System: GNU/Linux

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Details:

When running the following code, which converts rgb to ind and back to rgb,
the following exception is raised:

Mrgb=ind2rgb(Mind,map)
error: ind2rgb: MAP must be a valid colormap
error: called from
    ind2x at line 37 column 5
    ind2rgb at line 49 column 10

Example code

M(:,:,1) =  [225  230  250  243   20    3  244  247  255  255
242  252  239    0  239  224   27  252  255  255
224  239   28  243  236  231  240   11  255  255
243  252   15  224   15   12  251    0  255  255
224   11  252  227    0   11  232  251    0  255
243    4  255  228   19    4  243  224    0  255
 0  255  236  251  228  251  224  243  255    0
 19  236  255  224   27   12  251  236  255    0
  0  255  255  255  255  255  255  255  255    0
255    0    0    0    0    0    0    0    0  255];
M(:,:,2) =[255  255  255  255    0    0  255  255  255  255
255  255  255    0  255  255    0  255  255  255
255  255    0  255  255  255  255    0  255  255
255  255    0  255    0    0  255    0  255  255
255    0  255  255    0    0  255  255    0  255
255    0  255  255    0    0  255  255    0  255
0  255  255  255  255  255  255  255  255    0
0  255  255  255    0    0  255  255  255    0
0  255  255  255  255  255  255  255  255    0
255    0    0    0    0    0    0    0    0  255];
M(:,:,3) = [255  255  255  255    0    0  255  255  255  255
255  255  255    0    0    0    0  255  255  255
255  255    0    0    0    0    0    0  255  255
255  255    0    0    0    0    0    0  255  255
255    0    0    0    0    0    0    0    0  255
255    0    0    0    0    0    0    0    0  255
0    0    0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0    0    0
255    0    0    0    0    0    0    0    0  255];
[Mind map]=rgb2ind(M)
Mrgb=ind2rgb(Mind,map)




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