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Subject: Multi-page TIFF; how does it work?
Date: Wed, 13 Feb 2002 10:17:55 +0100
Message-ID: <0E83CF2DC8D35A48A90BBA3284E94F791A5F27@s4.neuro.mpg.de>
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Thread-Topic: Multi-page TIFF; how does it work?
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From: "James Chalcroft" <jchalcro@neuro.mpg.de>
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Sorry to bother the list with an "obvious" question, but I am a puzzled
new subscriber to this list.
My question is; how is it known to the TIFF reading software whether a
file contains one or multiple images?
I had expected that perhaps a special tag would indicate the presence of
multiple images, but my attempts so far to locate this tag have been
unsuccessful, nor did I find anything helpful in the TIFF revision 6.0
draft 1 of 14.Feb.1992.
May I assume then that multiple images are simply concatenated in the
file and that a TIFF reader need not know at the start how big the image
data are but should happily continue reading images after the first one
until it experiences <EOF>.
Could someone please elucidate the file structure for me?
Thanks a lot.

Jim Chalcroft


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<P><FONT SIZE=3D2 FACE=3D"Arial">Sorry to bother the list with an =
&quot;obvious&quot; question, but I am a puzzled new subscriber to this =
list.</FONT>

<BR><FONT SIZE=3D2 FACE=3D"Arial">My question is; how is it known to the =
TIFF reading software whether a file contains one or multiple =
images?</FONT>

<BR><FONT SIZE=3D2 FACE=3D"Arial">I had expected that perhaps a special =
tag would indicate the presence of multiple images, but my attempts so =
far to locate this tag have been unsuccessful, nor did I find anything =
helpful in the TIFF revision 6.0 draft 1 of 14.Feb.1992.</FONT></P>

<P><FONT SIZE=3D2 FACE=3D"Arial">May I assume then that multiple images =
are simply concatenated in the file and that a TIFF reader need not know =
at the start how big the image data are but should happily continue =
reading images after the first one until it experiences =
&lt;EOF&gt;.</FONT></P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Could someone please elucidate the file =
structure for me?</FONT>

<BR><FONT SIZE=3D2 FACE=3D"Arial">Thanks a lot.</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Jim Chalcroft</FONT>
</P>

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