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Date: Mon, 13 Dec 2004 14:54:15 +0100
Subject: Re: [Tiff] TIFF Pyramid
From: Eric VERGNAUD <eric.vergnaud@jlynx.com>
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le 13/12/04 13:32, Joris =E0 joris.at.lebbeke@skynet.be a =E9crit=A0:

> I wrote:
>> In the first image IFD, the SubIFDs tag is set with value
>> 3, and that yields a file with one main (biggest) image and 3 downsample
>> SubIFDs. If I change the value 3 of the SubIFDs tag to e.g. 2, it works =
as
>> expected, one main image is written, 2 SubIFDs are linked to that main i=
mage,
>> and the last is again written as a top-level IFD.
>=20
> I just noticed, it doesn't actually produce a SubIFD chain, but a SubIFD
> array.
> Meaning, the first SubIFD doesn't point to the second etc, but all SubIFD=
s are
> directly pointed to from the SubIFD tag.
>=20
> I do think that's uncommon, but it's valid, I think, according to the
> specification supplement that described SubIFDs tag.
>=20

Ok, I'll have a look at this in the next few days and let you know.

-------------------------------
Eric VERGNAUD - JLynx Software
Cutting-edge technologies and
services for software companies
web: http://www.jlynx.com
-------------------------------


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