Message-ID: 2C61CCE8A870D211A523080009B94E43029EFA81@HQ5
To: "tiff@olympiakos.com TIFF" <tiff@olympiakos.com>
Subject: RE: uge G4 fax compressed TIFF
From: "Grissom, Ed" <egrissom@ziimaging.com>
Date: Tue, 14 Sep 1999 08:54:40 -0500
Sender: owner-tiff@olympiakos.com



Our G4 implementation (non LibTIFF) had problems when the pixels per line
value got over 65K. this was due to pervasive use of "shorts" in the G4
algorithm.  There were actually two problems, one when the length of the
line was over 65K, and one when a single run within a line was over 65K. 

I am not sure from the description below which dimension is which, but if
the 75K dimension is the number of pixels per line, LibTIFF may be running
into the same problem that we had. 

--
ed grissom
egrissom@ziimaging.com


> -----Original Message-----
> From: mccoy@pixar.com [mailto:mccoy@pixar.com]
> Sent: Monday, September 13, 1999 7:17 PM
> To: tiff@olympiakos.com TIFF; Jacques Thiebauld
> Subject: Re: uge G4 fax compressed TIFF
> 
> 
> >I have a problem trying to read a TIFF containing a 75960 x 
> 45000 pixels
> >G4 fax compressed image!
> >The TIFF library is not able to read it.
> 
> What happens when you try to read it?
> Any error messages?
> How are you reading it? (what libtiff calls or programs)?
> 
> That's over 3 gigapixels, so any program that tries to store the whole
> image at once might have some problems.
> 
> Daniel McCoy   Pixar   mccoy@pixar.com
> 

