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Message-ID: <7883D97690364E6DBC52AB5D99C3DBBC@KAM1720>
From: "Kevin Myers" <kmyers1@clearwire.net>
To: <tiff@lists.maptools.org>,
	<graphicsmagick-help@lists.sourceforge.net>
Date: Wed, 4 Mar 2009 14:36:58 -0600
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Subject: Re: [Tiff] Alter TIFF Orientation
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After some brief research, trial and error, and review of the source =
code, tiffset did the track.  Interesting that the help and man page for =
tiffset indicate that a tag name is required, while in actual fact it =
seems that a decimal tag number is used.
  ----- Original Message -----=20
  From: Kevin Myers=20
  To: tiff@lists.maptools.org ; =
graphicsmagick-help@lists.sourceforge.net=20
  Sent: Wednesday, March 04, 2009 13:17
  Subject: Alter TIFF Orientation


  I received a number of extremely large TIFF images where the =
orientation value in the TIFF header has been incorrectly set to BOTTOM =
in the header rather than TOP, and that is causing the images to be =
displayed upside-down.  In theory I might be able to rotate these images =
180 degrees using something like GraphicsMagick without changing the =
orientation value, but that would be extremely slow.  All that I really =
need to do is change the orientation value in the header from BOTTOM to =
TOP.  Are there any utilities that allow this simple change to be =
performed?

  Thanks,
  Kevin M.


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	charset="iso-8859-1"
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.6000.16809" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>After some brief research, trial and =
error, and=20
review of the source code, tiffset did the track.&nbsp; Interesting that =
the=20
help and man page for tiffset indicate that a tag name is required, =
while in=20
actual fact it seems that a decimal tag number is used.</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title=3Dkmyers1@clearwire.net =
href=3D"mailto:kmyers1@clearwire.net">Kevin=20
  Myers</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dtiff@lists.maptools.org=20
  href=3D"mailto:tiff@lists.maptools.org">tiff@lists.maptools.org</A> ; =
<A=20
  title=3Dgraphicsmagick-help@lists.sourceforge.net=20
  =
href=3D"mailto:graphicsmagick-help@lists.sourceforge.net">graphicsmagick-=
help@lists.sourceforge.net</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, March 04, 2009 =

  13:17</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Alter TIFF =
Orientation</DIV>
  <DIV><BR></DIV>
  <DIV><FONT face=3DArial size=3D2>I received a number of extremely =
large TIFF=20
  images where the orientation value in the TIFF header has been =
incorrectly set=20
  to BOTTOM in the header rather than TOP, and that is causing the =
images to be=20
  displayed upside-down.&nbsp; In theory I might be able to rotate these =
images=20
  180 degrees using something like GraphicsMagick without changing the=20
  orientation value, but that would be extremely slow.&nbsp; All that I =
really=20
  need to do is change the orientation value in the header from BOTTOM =
to=20
  TOP.&nbsp; Are there any utilities that allow this simple change to be =

  performed?</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2>Thanks,</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2>Kevin M.</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial =
size=3D2></FONT>&nbsp;</DIV></BLOCKQUOTE></BODY></HTML>

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