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

[Robert A. Macy]

Yes, got a copy of something

Waited 3 hours for the download and then when I went to
install it said need to upgrade the Windows version !!!

So all for nothing.  

However, when I bypassed ImageMagick [I think] and went
straight to making a viewable file, that file was still
wrong.  

using the same image set with variable red...
>> [X,map]=rgb2ind(r,g,b);
>> save("Xtest.ppm",X,"ppm",map);
The file was NOT proper.  

            - Robert -

On Tue, 30 Jan 2007 11:46:52 -0600
 "Jordi Gutierrez Hermoso" <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.