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From: "Bob Young" <BYoung@nucoretech.com>
To: "Tiff Mailing List" <tiff@remotesensing.org>
Date: Fri, 27 May 2005 16:48:00 -0700
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Subject: [Tiff] Exif IFDs in TIFF files 
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Okay, I think this is my last question. As I mentioned I’m concerned with
four different TIFF related specifications TIFF/EXIF (ver 2.2), TIFF 6.0,
TIFF/EP, and DNG. From reading the specs it’s clear that TIFF/EXIF and DNG
allow metadata such as F-Stop, Focal Length, etc. to be placed in a separate
EXIF IFD. TIFF/EP appears not to allow a separate EXIF IFD, but defines a
nearly identical (to the EXIF tags) set of metadata tags to be placed in
IFD0. It appears that TIFF 6.0 does allow a separate EXIF IFD, but I’m not
sure.

Would someone please be kind enough to confirm or correct the above
assumptions regarding a separate EXIF IFD in TIFF 6.0 and TIFF/EP files?

TIA
Bob Young
Byoung@NuCoreTech.Com <mailto:Byoung@NuCoreTech.Com>


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<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>Okay, I think this is my last question. As I mentioned I&#8217;m =
concerned
with four different TIFF related specifications TIFF/EXIF (ver 2.2), =
TIFF 6.0,
TIFF/EP, and DNG. From reading the specs it&#8217;s clear that TIFF/EXIF =
and DNG
allow metadata such as F-Stop, Focal Length, etc. to be placed in a =
separate EXIF
IFD. TIFF/EP appears not to allow a separate EXIF IFD, but defines a =
nearly
identical (to the EXIF tags) set of metadata tags to be placed in IFD0. =
It appears
that TIFF 6.0 does allow a separate EXIF IFD, but I&#8217;m not sure. =
<o:p></o:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'><![if =
!supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>Would someone please be kind enough to confirm or correct the =
above
assumptions regarding a separate EXIF IFD in TIFF 6.0 and TIFF/EP files? =
<o:p></o:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'><![if =
!supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>TIA<o:p></o:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>Bob Young<o:p></o:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
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face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'><a =
href=3D"mailto:Byoung@NuCoreTech.Com">Byoung@NuCoreTech.Com</a><o:p></o:p=
></span></font></span></p>

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