Re: How do you read a .bmp file?

[Robert A. Macy]

Not in the binary
  octave-2..9.12-3-setup.exe

I can strip the header from the file, leaving 512 by 512
bytes of data.  So how do I read in that file?

Something about opening the file in 'b' mode and
sequentially assign the value to a variable.  like the
wavread function does.  

Just hoped there was something already written to do this.

Robert

On Sat, 29 Sep 2007 19:31:35 +0200
 Søren Hauberg <address@hidden> wrote:
> I believe there is a 'bmpread' function in the Octave
> forge image package. I haven't used it though...
> 
> Robert A. Macy skrev:
> > Thank you for your very prompt response and URL's.  
> > 
> > I think I went through this before and found Imagmagic
> is
> > always missing or such.  Do remember I got some custom
> code
> > from here that allowed me to make colored .bmp images.
>  
> > 
> > 
> > I do most of the work on the Win98 
> > running binary octave 2.1.50a
> > 
> > I have an adjacent machine running WinXP Professional
> which
> > I could try running the binary 2.9.12. I don't use that
> > version of octave, because all my plot routines died.  
> > 
> > However, I could open the .bmp with it, store the data
> as
> > .txt, and then open the data file using 2.1.50a
> > 
> > Is that possible?  Does 2.9.12 have an easy way to read
> > .bmp's ?
> > 
> > Robert
> > 
> > On Fri, 28 Sep 2007 23:58:31 -0400
> >  "James Sherman Jr." <address@hidden> wrote:
> >> Have you tried the image package from octave forge?
> >>  Found here:
> >> http://octave.sourceforge.net/packages.html
> >>
> >> You can get older versions of the packages to work
> with
> >> 2.1.50 here:
> >>
> >
>
http://sourceforge.net/project/showfiles.php?group_id=2888&package_id=29785
> >> I'm assuming that you still need to have the same
> >> requirements as the
> >> current build, i.e. ImageMagik installed.
> >>
> >> James Sherman
> >>
> >> On 9/28/07, Robert A. Macy <address@hidden>
> wrote:
> >>> I have a simple .bmp file, actually in two forms.
> >>>
> >>> Both are 512 by 512 pixels, one is RGB 24 bit format
> >> (?)
> >>> and the same gray image is in single ?? format.  Of
> >> course
> >>> the single format is 1/3 the size of the RGB image.
> >>>
> >>> Short of trashing the header, reading the file byte
> by
> >>> byte, is there some easy way to read in the pixel
> >> values
> >>> for a 512 by 512 image?
> >>>
> >>> I'm using Win98 to run octave 2.1.50a [I have to use
> >> 50a to
> >>> keep all those plotting functions.]
> >>>
> >>> Robert
> > _______________________________________________
> > Help-octave mailing list
> > address@hidden
> > https://www.cae.wisc.edu/mailman/listinfo/help-octave