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From: "Bob Young" <BYoung@nucoretech.com>
To: <tiff@remotesensing.org>
Subject: RE: [Tiff] TIFF/EP and TIFF 6.0
Date: Fri, 20 May 2005 10:28:40 -0700
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Steve,

Thanks, I've alread added DNG support to the firmware, the code already
saves and plays back DNG images. With that being the case, I've obviously
read the DNG spec, how does the DNG spec address my questions regarding
TIFF?

Regards,
Bob Young

-----Original Message-----
From: tiff-bounces@remotesensing.org
[mailto:tiff-bounces@remotesensing.org]On Behalf Of Steve Carlsen
Sent: Friday, May 20, 2005 9:30 AM
To: Bob Young; tiff@remotesensing.org
Subject: Re: [Tiff] TIFF/EP and TIFF 6.0

You might want to take a look at one more spec. See

http://www.adobe.com/products/dng/main.html

At 9:08 AM -0700 5/20/05, Bob Young wrote:
I9m new to this list and have a couple of questions. I9m updating the TIFF
capture and playback routines of digital camera firmware. I9d like to add a
thumbnail image to the TIFF files saved by the firmware. I9ve read both the
TIFF 6.0 spec, and the TIFF/EP spec. One difference between TIFF/EP and TIFF
6.0 appears to be which IFD is used for the thumbnail image. TIFF/EP
recommends the thumbnail be described by IFD0, and TIFF6 requires that IFD1
be used, as IFD0 must be the main image. The code is flexible enough to do
it either way, but I was surprised to find that when I opened a TIFF/EP
image (denoted by having a TIFF/EPStandardID tag in IFD0) in PhotoshopCS, it
displayed the thumbnail instead of the main image. I would have thought that
if any APP were TIFF/EP 3Aware2 it would have been Adobe. Is there something
I9m not understanding?

Secondly, regardless of whether the thumb is placed in IFD0 or IFD1, is it
legal for the thumb to be of a different photometric interpretation than the
main image, specifically can I use a YCbCr thumb with a RGB main image?

Thanks for any responses

Bob Young

Steve Carlsen
Adobe Systems

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<title>Re: [Tiff] TIFF/EP and TIFF 6.0</title>
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<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
color=3Dnavy face=3DArial><span
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>St=
eve,<o:p></o:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
color=3Dnavy 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=3Dnavy face=3DArial><span
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>Th=
anks, I&#8217;ve
alread added DNG support to the firmware, the code already saves and =
plays back
DNG images. With that being the case, I&#8217;ve obviously read the DNG =
spec, how
does the DNG spec address my questions regarding =
TIFF?<o:p></o:p></span></font></span></p>

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

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

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
color=3Dnavy 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 style=3D'margin-left:.5in'><font size=3D2 =
color=3Dblack
face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma;color:black'>-----Original
Message-----<br>
<b><span style=3D'font-weight:bold'>From:</span></b>
tiff-bounces@remotesensing.org =
[mailto:tiff-bounces@remotesensing.org]<b><span
style=3D'font-weight:bold'>On Behalf Of </span></b>Steve Carlsen<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Friday, May 20, =
2005 9:30 AM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> Bob Young;
tiff@remotesensing.org<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Re: [Tiff] =
TIFF/EP and
TIFF 6.0</span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'><![if =
!supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
color=3Dblack
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:black'>You might
want to take a look at one more spec. See</span></font><font =
color=3Dblack><span
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
color=3Dblack
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:black'><![if =
!supportEmptyParas]>&nbsp;<![endif]></span></font><font
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D1 =
color=3Dblack
face=3D"Lucida Grande"><span =
style=3D'font-size:7.5pt;font-family:"Lucida Grande";
color:black'>http://www.adobe.com/products/dng/main.html</span></font><fo=
nt
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
color=3Dblack
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:black'><![if =
!supportEmptyParas]>&nbsp;<![endif]></span></font><font
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
color=3Dblack
face=3D"Times New Roman"><span style=3D'font-size:12.0pt;color:black'>At =
9:08 AM
-0700 5/20/05, Bob Young wrote:</span></font><font color=3Dblack><span
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal =
style=3D'margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:=

auto;margin-left:1.0in'><font size=3D2 color=3Dblack face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>I9m new to this =
list and
have a couple of questions. I9m updating the TIFF capture and playback =
routines
of digital camera firmware. I9d like to add a thumbnail image to the =
TIFF files
saved by the firmware. I9ve read both the TIFF 6.0 spec, and the TIFF/EP =
spec.
One difference between TIFF/EP and TIFF 6.0 appears to be which IFD is =
used for
the thumbnail image. TIFF/EP recommends the thumbnail be described by =
IFD0, and
TIFF6 requires that IFD1 be used, as IFD0 must be the main image. The =
code is
flexible enough to do it either way, but I was surprised to find that =
when I
opened a TIFF/EP image (denoted by having a TIFF/EPStandardID tag in =
IFD0) in
PhotoshopCS, it displayed the thumbnail instead of the main image. I =
would have
thought that if any APP were TIFF/EP 3Aware2 it would have been Adobe. =
Is there
something I9m not understanding?</span></font><font color=3Dblack><span
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal =
style=3D'margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:=

auto;margin-left:1.0in'><font size=3D2 color=3Dblack face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>&nbsp;</span></f=
ont><font
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal =
style=3D'margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:=

auto;margin-left:1.0in'><font size=3D2 color=3Dblack face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>Secondly, =
regardless of
whether the thumb is placed in IFD0 or IFD1, is it legal for the thumb =
to be of
a different photometric interpretation than the main image, specifically =
can I
use a YCbCr thumb with a RGB main image?</span></font><font =
color=3Dblack><span
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal =
style=3D'margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:=

auto;margin-left:1.0in'><font size=3D2 color=3Dblack face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>&nbsp;</span></f=
ont><font
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal =
style=3D'margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:=

auto;margin-left:1.0in'><font size=3D2 color=3Dblack face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>Thanks for any =
responses</span></font><font
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal =
style=3D'margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:=

auto;margin-left:1.0in'><font size=3D2 color=3Dblack face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>&nbsp;</span></f=
ont><font
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal =
style=3D'margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:=

auto;margin-left:1.0in'><font size=3D2 color=3Dblack face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>Bob =
Young</span></font><font
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
color=3Dblack
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:black'><![if =
!supportEmptyParas]>&nbsp;<![endif]></span></font><font
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
color=3Dblack
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:black'>Steve Carlsen</span></font><font
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
color=3Dblack
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:black'>Adobe Systems</span></font><font
color=3Dblack><span =
style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
/p>

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