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From: "Nenad Rijavec" <nenad@us.ibm.com>
Importance: Normal
Subject: Re: Wang tiff
To: Neil Durant <neil@sphere3.demon.co.uk>
Cc: tiff@olympiakos.com
Date: Wed, 21 Mar 2001 10:02:45 -0700
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Neil,

Wang TIFF is a Wang extension to TIFF 5.0, designed to accomodate multiple
pages. There seem to be a couple of flavors of Wang TIFF, but they boil
down to having each page kept in a TIFF 5.0 format, concatenated in a file.
At the end of the file, there are a few data structures that serve as a
directory.

I am not aware of a public domain package you could use to convert Wang
TIFFs to JPEGs, but it should not be that big of a task to write a program
that will unpack Wang TIFFs into a set of TIFF 5.0 files. If you send me a
sample, I can look if the flavor you have is one I am familiar with. If it
is, I can give you some pointers.

Shameless commercial plug:

Assuming that your files are grayscale (as opposed to color), and that it's
a Wang format I've seen before, I actually do have couple of programs that
can be strung together to go from Wang TIFF to JPEG in a batch mode.
Unfortunately, these are not public domain, but if you are interested, let
me know - I can find out how much it would cost you.

Hope this helps,

Nenad Rijavec
IBM Printing Systems Division
Boulder, CO.
nenad@us.ibm.com


Neil Durant <neil@sphere3.demon.co.uk>@olympiakos.com on 03/21/2001
08:19:59 AM

Sent by:  owner-tiff@olympiakos.com


To:   tiff@olympiakos.com
cc:
Subject:  Wang tiff



A colleague has given me a very large number of tiff files that he
generated from a scanner with the software that came with that, and it
seems that they are not in a TIFF format I can load into conventional
graphics packages such as Paint Shop Pro.  A bit of investigation has
revealed that they are "Wang TIFF" files.

I need to convert them into JPEG format, but the only way I have found
so far is using the "Imaging" program that comes with Windows NT, to
convert them first to BMP and then on to JPEG in a separate application.
However the BMP files are 24 Mb in size (from 200kb TIFF files), and the
whole process is taking forever (I have hundreds of images to convert).

Does anyone know of some tool I can use to convert these Wang TIFFs to
JPEG directly, and also ideally do it in some kind of "batch" mode, so I
can leave it churning on the whole set of files?

Any information would be greatly appreciated!!!

Thanks,

Neil
--
===================================================================
Neil Durant
<neil@sphere3.demon.co.uk>                        Fax: 08700 520159
===================================================================

