Message-ID: 8100014B48DAD111AA4100805F9F3FC903A0E7CB@host60.corbis.com
To: "'Grissom, Ed'" <egrissom@ziimaging.com>, tiff@olympiakos.com, "'pdp197@ecs.soton.ac.uk'" <pdp197@ecs.soton.ac.uk>
Subject: RE: JPEG tiled TIFF files
From: Bill Radcliffe <BillR@corbis.com>
Date: Wed, 12 Apr 2000 07:01:06 -0700
Sender: owner-tiff@olympiakos.com


You should all have a look at ImageMagick (http://www.imagemagick.org). This
package writes all kinds of TIFF files out of the box, with full support for
IPTC metadata, JPEG, as well as a well a special pyramid tiled TIFF. We call
this PTIFF. You can combine this with JPEG to get a nice multi-resolution
compressed TIFF file that still opens in Photoshop!

> -----Original Message-----
> From: Grissom, Ed [SMTP:egrissom@ziimaging.com]
> Sent: Wednesday, April 12, 2000 5:36 AM
> To:   tiff@olympiakos.com
> Subject:      RE: JPEG tiled TIFF files
> 
> 
> LibTIFFer's -
> 
> I replied to Paul with info about TTN2 and the great description of
> writing
> JPEG-in-TIFF contained therein.
> 
> Why is TTN2 not on the www.libtiff.org web page ?
> 
> I found it at ftp://ftp.sgi.com/graphics/tiff/TTN2.draft.txt
> 
> 
> --
> ed grissom
> egrissom@ziimaging.com
> 
> 
> > -----Original Message-----
> > From: Paul Preuveneers [mailto:pdp197@ecs.soton.ac.uk]
> > Sent: Wednesday, April 12, 2000 4:23 AM
> > To: tiff@olympiakos.com
> > Subject: JPEG tiled TIFF files
> > 
> > 
> > 
> > Anybody have an idea of methods to compress and store JPEG tiles
> > within a TIFF file. I am using the IJG groups libjpeg distribution  to
> > compress the data but there are no real resources for methods 
> > to create
> > the new TIFF file (that I can find). If there is any out 
> > there I would be
> > grateful if you could direct me towards it..
> > 
> > 
> > At the moment I get errors telling me that there is an unknown data
> > compression algorithm 7, which the doc says is JPEG. Is it that the
> > program used to read the image is old and doesn't understand what tags
> > are set? 
> > 
> > Basically what I need to know is:
> > 
> > What tags do I need to set/use. Such as JPEGTables/compression
> > and what do I need to set them to?
> > 
> > Do I need an abbreviated compression format or will the 
> > interchange Jpeg
> > format be ok?
> > 
> > 
> > Thanks
> > 
> > 
> > Paul Preuveneers
> > 
> > 
> > 

