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	for tiff@sgi.sgi.com id AA15679; Tue, 10 Aug 93 09:00:12 -0700
Message-Id: <9308101600.AA15679@oxford.chez.sgi.com>
To: Kevin Clark <kevin@demo.eltext.co.nz>
Subject: Re: TIFF2FAX 
Cc: tiff@sgi.sgi.com
In-Reply-To: Your message of Tue, 10 Aug 93 18:24:28 +1200.
             <199308100624.AA21347@demo.eltext.co.nz> 
Date: Tue, 10 Aug 93 09:00:12 PDT
From: Sam Leffler <sam@oxford.chez.sgi.com>
Sender: tiff-owner@sgi.sgi.com

    To:      sam@sgi.sgi.com, tiff@sgi.sgi.com
    Subject: TIFF2FAX
    From:    Kevin Clark <kevin@demo.eltext.co.nz>
    Date:    Tue, 10 Aug 93 18:24:28 X

    
    I am looking for some code that will take a set of tiff images and
    convert them into one large tiff file suitable for faxing.

    I am at the moment using fax2ps piped to gs, and this work well.
    It is however slow and involves a lot of unneccessary conversion
    and CPU time.

    I have had a look at tiffcp and fax2tiff, but find that fax2tiff does
    not like my tiff images, which is odd since fax2ps does. %-(

tiffcp will not convert between color spaces.  fax2tiff takes
raw g3-encoded data as input, not tiff.

    Tiffcp seems to work, but the result is not liked by flexfax.  Maybe
    I am just using the wrong options but it complains that it is not a bilevel
    image.

yes.  if you have a color image then you need to convert it to a
bilevel image and encode it in a format for faxing.  you don't tell
enough about the images that you are working with, but perhaps
something like

tiff2bw a.tif b.tif
tiffdither -f b.tif c.tif

will do what you want.  in the long run, if you are doing lots of
image manipulation, you may be better off using a more general
package like the pbm tools.

	Sam




