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Date: Mon, 5 Dec 2005 14:30:28 -0800 (PST)
From: Brad Brock <brad_brock@yahoo.com>
Subject: Re: [Tiff] how to split layers in tiff file
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In my last post, I mean layers in the context of Photoshop and GIMP. I really need a help in this topic. In fact, not only tiff file but also psd file, I think both of them are very similar. Please, any help would be great. Thank you.

Bob Friesenhahn <bfriesen@simple.dallas.tx.us> wrote:  On Mon, 5 Dec 2005, John Engelke wrote:

> Please any further information on this topic would be helpful. I have
> a Photoshop Tiff file with embedded layers that I need to either break
> out and recombine or simply delete, similar to the poster's issue. My
> issue is about layers as opposed to channels. I would think that since
> Photoshop is used in like 90+ percent of publishing operations around
> the world (defacto standard) that this issue would have been
> addressed. Any guidance whatsoever is appreciated.

As Joris says, TIFF has "channels" rather than "layers". However, 
extra channels can be used to implement "layers". For example, an 
associated alpha channel is called a "layer" by Photoshop.

Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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<DIV id=RTEContent>In my last post, I mean layers in the context of Photoshop and GIMP. I really need a help in this topic. In fact, not only tiff file but also psd file, I think both of them are very similar. Please, any help would be great. Thank you.<BR><BR><B><I>Bob Friesenhahn &lt;bfriesen@simple.dallas.tx.us&gt;</I></B> wrote:  <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">On Mon, 5 Dec 2005, John Engelke wrote:<BR><BR>&gt; Please any further information on this topic would be helpful. I have<BR>&gt; a Photoshop Tiff file with embedded layers that I need to either break<BR>&gt; out and recombine or simply delete, similar to the poster's issue. My<BR>&gt; issue is about layers as opposed to channels. I would think that since<BR>&gt; Photoshop is used in like 90+ percent of publishing operations around<BR>&gt; the world (defacto standard) that this issue would have been<BR>&gt; addressed. Any guidance whatsoever is
 appreciated.<BR><BR>As Joris says, TIFF has "channels" rather than "layers". However, <BR>extra channels can be used to implement "layers". For example, an <BR>associated alpha channel is called a "layer" by Photoshop.<BR><BR>Bob<BR>======================================<BR>Bob Friesenhahn<BR>bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/<BR>GraphicsMagick Maintainer, http://www.GraphicsMagick.org/<BR>_______________________________________________<BR>Tiff mailing list: Tiff@lists.maptools.org<BR>http://lists.maptools.org/mailman/listinfo/tiff<BR>http://www.remotesensing.org/libtiff/<BR></BLOCKQUOTE><BR></DIV><p>
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