[comp.graphics] TIFF LZW compressed

otto@tukki.jyu.fi (Otto J. Makela) (04/09/90)

I recently scanned some very nice art pictures (Dali, Escher, Margritte) on
a Apple Macintosh IIcx, using a software called ImageStudio (or was that the
grey-level version ?).  I stored the pictures as a "LZW compressed TIFF image"
with 256 colors, which turned out to produce a TIFF with type "MM".

Now, it seems that no other software either on a Mac, PC or a Unix sun4 can
read these.  Does anyone have any clue to converting these to some more common
format like Mac PICT, X10 or perhaps even (the final target) GIF ?
I have tried vgaimg and graphics workshop on the PC, a couple of freebies on
the Mac and pbm on the sun4, all which say that type "MM" is not supported.

Sorry for the cross-posts, but I'm really getting to my wit's end with these...
Please reply by mail, if at all possible.
--
* * * Otto J. Makela (otto@jyu.fi, MAKELA_OTTO_@FINJYU.BITNET) * * * * * * *
* Phone: +358 41 613 847, BBS: +358 41 211 562 (CCITT, Bell 2400/1200/300) *
* Mail: Kauppakatu 1 B 18, SF-40100 Jyvaskyla, Finland, EUROPE             *
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rsilverman@eagle.wesleyan.edu (04/12/90)

In article <OTTO.90Apr9102512@tukki.jyu.fi>, otto@tukki.jyu.fi (Otto J. Makela) writes:
> I recently scanned some very nice art pictures (Dali, Escher, Margritte) on
> a Apple Macintosh IIcx, using a software called ImageStudio (or was that the
> grey-level version ?).  I stored the pictures as a "LZW compressed TIFF image"
> with 256 colors, which turned out to produce a TIFF with type "MM".
> 
> Now, it seems that no other software either on a Mac, PC or a Unix sun4 can
> read these. ...

Otto,

You probably saved the images as RIFF (raster image file format) files, which
is ImageStudio's own format -- if I remember right, that was just TIFF with LZW
compression.  Most Mac programs don't use any compression, or just PackBits (a
simple RLE compression provided by the Mac Toolbox).  If you can, I would just
read them back into ImageStudio and save them out again (using the "Save As
Other..." command) as TIFF files.  I don't know of any other programs that read
RIFF files.

                                                Richard Silverman

arpa:	rsilverman@eagle.wesleyan.edu           Systems Engineer
bitnet:	rsilverman@wesleyan.bitnet              AM Computer Products
CIS:	[72727,453]                             Southington, CT 06489