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


From: Robert A. Macy
Subject: Re: Anybody have a prgram to write a .bmp file?
Date: Wed, 31 Jan 2007 19:44:21 -0800

Is there another way?

cat comes back as undefined.

On Wed, 31 Jan 2007 21:06:09 -0500
 Paul Kienzle <address@hidden> wrote:
> 
> On Jan 30, 2007, at 10:01 PM, Robert A. Macy wrote:
> 
> > However, it has the same flaw that all the image
> functions
> > are doing:
> >>> r=ones(256,1)*(0:255)/255;
> >>> g=.5*ones(256,256);b=.5*ones(256,256);
> >>> [X,map]=rgb2ind(r,g,b);
> >>> bmpwrite(X,map,"Xtest.bmp");
> > when opened the square is not gradually changing color
> as
> > expected, but a solid green square.
> 
> bmpwrite is expecting values in 0-255.  Try the
> following:
> 
>    r=ones(256,1)*(0:255)/255;
>    g=.5*ones(256,256);b=.5*ones(256,256);
>    bmpwrite(cat(3,r,g,b)*256,'Xtest.bmp');
> 
> - Paul
> 



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