Re: Anybody have a prgram to write a .bmp file?

[Robert A. Macy]

That's EXACTLY what I get, the same color, too.

On Tue, 30 Jan 2007 19:06:47 -0800
 "Henry F. Mollet" <address@hidden> wrote:
> I get the same as what Robert A. Macy described.
> [~] -bash-2.05b 501$ octave
> GNU Octave, version 2.1.71 (powerpc-apple-darwin8.1.0).
> 
> octave:1> r=ones(256,1)*(0:255)/255;
> octave:2> g=.5*ones(256,256);
> octave:3> b=.5*ones(256,256);
> octave:4> imshow(r,g,b);
> octave:5> 
> and using
> G N U P L O T
> version 4.0 patchlevel 0
> Attached graph appears in Preview (version3.0.8 (409);
> copyright Apple) by
> default or set up this way.
> Henry
> 
> 
> on 1/30/07 9:46 AM, Jordi Gutierrez Hermoso at
> address@hidden wrote:
> 
> > On 29/01/07, Robert A. Macy <address@hidden>
> wrote:
> >> I need a program that writes an r, g, b set of
> matrices to
> >> create a .bmp file
> >> 
> >> Anybody got one?
> > 
> > Sure. ImageMagick. I think I heard you say that you use
> a non-free
> > operating system, and I'm not sure if those
> distributions of Octave
> > include ImageMagick by default; you might have to get
> it on your own.
> > 
> > I'm also using the 'forge script imwrite to do the
> writing.
> > 
> >> for example: here are the simple matrices:
> >>>> r=ones(256,1)*(0:255)/255;
> >>>> g=.5*ones(256,256);
> >>>> b=.5*ones(256,256);
> >> 
> >> I tried to do
> >>>> imshow(r,g,b);
> >> but I only get a solid colored image with no shading
> >> variations.  the colors only come up based upon the
> first
> >> few pixels
> > 
> > That's odd. I can't reproduce this behaviour on Debian
> with Octave
> > 2.9.9. Octave is calling ImageMagick to do the
> rendering, though, and
> > I think I read that you aren't using ImageMagick.
> > 
> > HTH,
> > - Jordi G. H.
> > _______________________________________________
> > Help-octave mailing list
> > address@hidden
> > https://www.cae.wisc.edu/mailman/listinfo/help-octave
>