Return-Path: <tiff-bounces@lists.maptools.org>
Received: from inas022.isp.belgacom.be (localhost [127.0.0.1])
        by inav026.isp.belgacom.be (8.12.11.20060308/8.12.11/Skynet-IN-AV-3.00) with ESMTP id k875PCpe006669
        for <joris.at.lebbeke@skynet.be>; Thu, 7 Sep 2006 07:25:12 +0200
        (envelope-from <tiff-bounces@lists.maptools.org>)
Received: from inmx018.isp.belgacom.be (inmx018.isp.belgacom.be [195.238.4.79])
        by inas022.isp.belgacom.be (8.12.11.20060308/8.12.11/Skynet-IN-AS-2.03) with ESMTP id k875PBRq027230
        for <joris.at.lebbeke@skynet.be>; Thu, 7 Sep 2006 07:25:12 +0200
        (envelope-from <tiff-bounces@lists.maptools.org>)
Received: from duke.maptools.org (r153.dmsolutions.ca [209.217.116.153] (may be forged))
        by inmx018.isp.belgacom.be (8.12.11.20060308/8.12.11/Skynet-IN-2.32) with ESMTP id k875P214025768
        for <joris.at.lebbeke@skynet.be>; Thu, 7 Sep 2006 07:25:02 +0200
        (envelope-from <tiff-bounces@lists.maptools.org>)
Received: from duke.maptools.org (duke.maptools.org [127.0.0.1])
	by duke.maptools.org (8.12.11/8.12.10) with ESMTP id k875FArW026589;
	Thu, 7 Sep 2006 01:16:14 -0400
Received: from wx-out-0506.google.com (wx-out-0506.google.com [66.249.82.236])
	by duke.maptools.org (8.12.11/8.12.10) with ESMTP id k875F6Jv026585
	for <tiff@lists.maptools.org>; Thu, 7 Sep 2006 01:15:07 -0400
Received: by wx-out-0506.google.com with SMTP id s7so113193wxc
	for <tiff@lists.maptools.org>; Wed, 06 Sep 2006 22:15:05 -0700 (PDT)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com;
	h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references;
	b=ghdLabQYXIX8IEM7d829EAtP29iQQq+lbEesZU15sBDNyeyqLxFFkcWsaGNndIe8zX2xjI0qVzcwVC/k1ItFOJMpGIMe0J2OV0pObaV+4h4qhCR4jTPE5+uFjG1XJXq+dJ8L7YrH1FUxSBMqcZCIi+tPrAkeuf56CviOFlEFFLU=
Received: by 10.70.56.4 with SMTP id e4mr544711wxa;
	Wed, 06 Sep 2006 22:15:04 -0700 (PDT)
Received: by 10.70.19.5 with HTTP; Wed, 6 Sep 2006 22:15:04 -0700 (PDT)
Message-ID: <11848b2f0609062215r15610265r224e521e1b2e6c8@mail.gmail.com>
Date: Thu, 7 Sep 2006 10:45:04 +0530
From: "Anurag Singh" <contact.anurag@gmail.com>
To: Joris <joris.at.lebbeke@skynet.be>
Subject: Re: [Tiff] Some tags with count zero
In-Reply-To: <003c01c6d1b5$c9093f30$328bf651@dfgrrxsknr4e>
MIME-Version: 1.0
References: <11848b2f0609052331t21d9f7edw1f30bd20e4e183e1@mail.gmail.com>
	<003c01c6d1b5$c9093f30$328bf651@dfgrrxsknr4e>
Cc: tiff@lists.maptools.org
X-BeenThere: tiff@lists.maptools.org
X-Mailman-Version: 2.1.4
Precedence: list
List-Id: TIFF and libtiff discussion <tiff.lists.maptools.org>
List-Unsubscribe: <http://lists.maptools.org/mailman/listinfo/tiff>,
	<mailto:tiff-request@lists.maptools.org?subject=unsubscribe>
List-Archive: <http://lists.maptools.org/mailman/private/tiff>
List-Post: <mailto:tiff@lists.maptools.org>
List-Help: <mailto:tiff-request@lists.maptools.org?subject=help>
List-Subscribe: <http://lists.maptools.org/mailman/listinfo/tiff>,
	<mailto:tiff-request@lists.maptools.org?subject=subscribe>
Content-Type: multipart/mixed; boundary="===============1822759307=="
Sender: tiff-bounces@lists.maptools.org
Errors-To: tiff-bounces@lists.maptools.org
X-UIDL: 000000000023ceae.00001a28
X-MSP-STORE: Thu, 07 Sep 2006 07:25:22 +0200
Status:   

--===============1822759307==
Content-Type: multipart/alternative; 
	boundary="----=_Part_153261_15973271.1157606104689"

------=_Part_153261_15973271.1157606104689
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

Act i want to make exact copy of tags in output file,  and i dont think that
it would create any problem problem. Because existing tif image already have
that tag with same count and value (or offset). Actually i my case count is
0, i am expecting that tiff image interpreted as dummy tag..

i want to know that if any tag have count zero then is there any use of this
tag?

On 9/6/06, Joris <joris.at.lebbeke@skynet.be> wrote:

> Anurag,
>
> Anurag Singh wrote:
> > I am woking with tiff, using libtiff. I got some tags which have
> > count zero in the tiff file. these are tag numbers of those tags.
> >
> > 34016, 34017, 34018, 34022, 34025, 34026, 34029
> >
> > Is ther any use of these tags when it's count zero, or simple we
> > should drop these tags during copying.
>
> In theory, one should never copy tags that are unknown.
>
> You may do otherwise, and many people do. But then you are open for
> trouble, for instance when copying a LONG value that is in fact intended
> to be a private IFD pointer.
>
>
> Joris Van Damme
> info@awaresystems.be
> http://www.awaresystems.be/
> Download your free TIFF tag viewer for windows here:
> http://www.awaresystems.be/imaging/tiff/astifftagviewer.html
>
>

------=_Part_153261_15973271.1157606104689
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

Act i want to make exact copy of tags in output file,&nbsp; and i dont think that it would create any problem problem. Because existing tif image already have that tag 
<div><span class="gmail_quote">with same count and value (or offset). Actually i my case count is 0, i am expecting that tiff image interpreted as dummy tag..</span></div>
<div><span class="gmail_quote"></span>&nbsp;</div>
<div><span class="gmail_quote">i want to know that if any tag have count zero then is there any use of this tag?</span></div>
<div><span class="gmail_quote"></span><span class="gmail_quote"></span>&nbsp;</div>
<div><span class="gmail_quote">On 9/6/06, <b class="gmail_sendername">Joris</b> &lt;<a href="mailto:joris.at.lebbeke@skynet.be">joris.at.lebbeke@skynet.be</a>&gt; wrote:</span></div>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Anurag,<br><br>Anurag Singh wrote:<br>&gt; I am woking with tiff, using libtiff. I got some tags which have
<br>&gt; count zero in the tiff file. these are tag numbers of those tags.<br>&gt;<br>&gt; 34016, 34017, 34018, 34022, 34025, 34026, 34029<br>&gt;<br>&gt; Is ther any use of these tags when it's count zero, or simple we<br>
&gt; should drop these tags during copying.<br><br>In theory, one should never copy tags that are unknown.<br><br>You may do otherwise, and many people do. But then you are open for<br>trouble, for instance when copying a LONG value that is in fact intended
<br>to be a private IFD pointer.<br><br><br>Joris Van Damme<br><a href="mailto:info@awaresystems.be">info@awaresystems.be</a><br><a href="http://www.awaresystems.be/">http://www.awaresystems.be/</a><br>Download your free TIFF tag viewer for windows here:
<br><a href="http://www.awaresystems.be/imaging/tiff/astifftagviewer.html">http://www.awaresystems.be/imaging/tiff/astifftagviewer.html</a><br><br></blockquote><br>

------=_Part_153261_15973271.1157606104689--

--===============1822759307==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________
Tiff mailing list: Tiff@lists.maptools.org
http://lists.maptools.org/mailman/listinfo/tiff
http://www.remotesensing.org/libtiff/
--===============1822759307==--
