🚀 go-pugleaf

In article <999@esosun.UUCP> zeke@esosun.UUCP (James Dehnert) writes:
> 
>   On pioneer.unm.edu there are a number of NASA images from the voyager
> space crafts.  These images are in a compressed raw format that dosen't
> seem to be readable by any of the software on my system.  Does anyone
> know of a program that can uncompress and display these images?
>   There is source code on the system to do this, but the C code seems to
> be writen for PC's, and I am not what one would call a "really good"
> programer.  I'll take a crack at porting the code if nothing exists, but
> I don't know if I'll ever have the time, and my skill level may not be
> up to par.
> 
>   So, is there some existing software to view these images?
> 
>   Zeke

I'm not into Voyager data, but if they're like the shuttle photos, then  
they are in band-sequential format with a 512 byte header, with
512 x 512 bytes of red, 512 x 512 bytes of green, and 512 x 512 bytes
of blue.  Use HexEditor (from Sonata) to examine the first 512 bytes.   
That should tell you the number of pixels-per-line (512) and the number of  
lines-per-band (512) and the number of bands (3).  If it makes sense, then  
you can use the unix utility "dd" to strip out the individual bands into  
three files (do a "man dd"), and then use my NeXT utility "RGBtoTIFF" (at  
cs.orst.edu) to put them into a compressed TIFF file.  Then use Icon, or  
your favorite TIFF reader.  

You might try running this little script on your file (see the Help screen  
of RGBtoTIFF):
dd if=$1.dat of=$1.r skip=1 count=$2 bs=$2
dd if=$1.dat of=$1.g skip=$2+1 count=$2 bs=$2
dd if=$1.dat of=$1.b skip=2*$2+1 count=$2 bs=$2

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