Today I noticed that the image package treats indexed images differently in
functions within the module.
Using [X, map] = *imread *will give me a matrix X with values from 0 to
n-1, while all other image package functions expect index mapping from 1 to
n, such as *imshow*, *ind2rgb*, *ind2gray*.
This fact makes the execution of a simple *imshow('some_file.gif') *to show
something different from the original image. imshow(*X+1*, map) would show
it fine as well.
The function ind2rgb, for example, even has a validation for indices less
than 1 in line 43 of ind2rgb.m:
## Check if X is an indexed image.
if (ndims (x) != 2 || any (x(:) != fix (x(:))) || *min (x(:)) < 1*)
error ("ind2rgb: X must be an indexed image");
Is it normal that I am receving 0 values in X matrix? I am using octave
3.6.2 and graphicsmagick 1.3.16.
------------------------------------------------------------------------------
LogMeIn Central: Instant, anywhere, Remote PC access and management.
Stay in control, update software, and manage PCs from one command center
Diagnose problems and improve visibility into emerging IT issues
Automate, monitor and manage. Do more in less time with Central
http://p.sf.net/sfu/logmein12331_d2d
_______________________________________________
Octave-dev mailing list
Octave-dev@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/octave-dev
