Replied: Fri, 04 Feb 2000 12:15:24 +0100
Replied: "Farrell, Thom" <TFarrell@fallschurch.esys.com>
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From: "Farrell, Thom" <TFarrell@fallschurch.esys.com>
To: tiff@olympiakos.com
Cc: "Farrell, Thom" <TFarrell@fallschurch.esys.com>
Subject: Simple question that became complex (long message)
Date: Thu, 3 Feb 2000 15:17:55 -0500 
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Hi!
	We have a Solaris 2.6 system with libtiff that we compiled from
source in October of last year, sorry I don't have the version number off
hand. In the system we have images from two sources; images we scan locally
and images that we receive on magnetic tape from another agency. I have
written a application which retrieves Group 4 TIFF images from the database
(Informix 7.32UC2) and prints them via Vividata's PostShop 4.0 which makes
use of Aladdin Ghostscrip 5.50. The images that were created locally seem to
print OK but the images we receive from outside our agency print as
thumbnails. After extracting a couple of the images and running tiffinfo on
them I go some results that seem rather curious to me. Unfortunately I have
not been able to figure out if it means what I think it means, hence this
email.
	
This is the output for an image which prints OK:

TIFF Directory at offset 0x8
Subfile Type: (0 = 0x0)
Image Width: 2544 Image Length: 3296
Resolution: 300, 300 pixels/inch
Bits/Sample: 1
Compression Scheme: CCITT Group 4
Photometric Interpretation: min-is-white
Thresholding: bilevel art scan
FillOrder: lsb-to-msb
Samples/Pixel: 1
Rows/Strip: 3296
Planar Configuration: single image plane
Group 4 Options: (0 = 0x0)

This image prints as a thumbnail:

TIFF Directory at offset 0x8
Image Width: 2544 Image Length: 3297
Resolution: 6.27216e+07, 6.27216e+07
Compression Scheme: CCITT Group 4 facsimile encoding
Photometric Interpretation: min-is-white
FillOrder: msb-to-lsb
Orientation: row 0 top, col 0 lhs
Planar Configuration: single image plane
Group 4 Options: (0 = 0x0)

I don't really think it is a thumbnail but that is what it appears to be
when I print it. The report on the Resolution line for the "thumbnail"
concerns me. Is there something wrong with the image or is there a bug which
is presenting the odd numbers in the "thumbnail"? Why is there no Subfile
type, Thresholding, samples/pixel, and Rows/Strip on the "thumbnail"? Does
this have to do with the different compression schemes?

	If anyone can provide any information about this I would appreciate
it; even it is read book "X". Thanks.

Thom


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charset=3Diso-8859-1">
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<TITLE>Simple question that became complex (long message)</TITLE>
</HEAD>
<BODY>

<P><FONT SIZE=3D2>Hi!</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2>We have a =
Solaris 2.6 system with libtiff that we compiled from source in October =
of last year, sorry I don't have the version number off hand. In the =
system we have images from two sources; images we scan locally and =
images that we receive on magnetic tape from another agency. I have =
written a application which retrieves Group 4 TIFF images from the =
database (Informix 7.32UC2) and prints them via Vividata's PostShop 4.0 =
which makes use of Aladdin Ghostscrip 5.50. The images that were =
created locally seem to print OK but the images we receive from outside =
our agency print as thumbnails. After extracting a couple of the images =
and running tiffinfo on them I go some results that seem rather curious =
to me. Unfortunately I have not been able to figure out if it means =
what I think it means, hence this email.</FONT></P>

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
<BR><FONT SIZE=3D2>This is the output for an image which prints =
OK:</FONT>
</P>

<P><FONT SIZE=3D2>TIFF Directory at offset 0x8</FONT>
<BR><FONT SIZE=3D2>Subfile Type: (0 =3D 0x0)</FONT>
<BR><FONT SIZE=3D2>Image Width: 2544 Image Length: 3296</FONT>
<BR><FONT SIZE=3D2>Resolution: 300, 300 pixels/inch</FONT>
<BR><FONT SIZE=3D2>Bits/Sample: 1</FONT>
<BR><FONT SIZE=3D2>Compression Scheme: CCITT Group 4</FONT>
<BR><FONT SIZE=3D2>Photometric Interpretation: min-is-white</FONT>
<BR><FONT SIZE=3D2>Thresholding: bilevel art scan</FONT>
<BR><FONT SIZE=3D2>FillOrder: lsb-to-msb</FONT>
<BR><FONT SIZE=3D2>Samples/Pixel: 1</FONT>
<BR><FONT SIZE=3D2>Rows/Strip: 3296</FONT>
<BR><FONT SIZE=3D2>Planar Configuration: single image plane</FONT>
<BR><FONT SIZE=3D2>Group 4 Options: (0 =3D 0x0)</FONT>
</P>

<P><FONT SIZE=3D2>This image prints as a thumbnail:</FONT>
</P>

<P><FONT SIZE=3D2>TIFF Directory at offset 0x8</FONT>
<BR><FONT SIZE=3D2>Image Width: 2544 Image Length: 3297</FONT>
<BR><FONT SIZE=3D2>Resolution: 6.27216e+07, 6.27216e+07</FONT>
<BR><FONT SIZE=3D2>Compression Scheme: CCITT Group 4 facsimile =
encoding</FONT>
<BR><FONT SIZE=3D2>Photometric Interpretation: min-is-white</FONT>
<BR><FONT SIZE=3D2>FillOrder: msb-to-lsb</FONT>
<BR><FONT SIZE=3D2>Orientation: row 0 top, col 0 lhs</FONT>
<BR><FONT SIZE=3D2>Planar Configuration: single image plane</FONT>
<BR><FONT SIZE=3D2>Group 4 Options: (0 =3D 0x0)</FONT>
</P>

<P><FONT SIZE=3D2>I don't really think it is a thumbnail but that is =
what it appears to be when I print it. The report on the Resolution =
line for the &quot;thumbnail&quot; concerns me. Is there something =
wrong with the image or is there a bug which is presenting the odd =
numbers in the &quot;thumbnail&quot;? Why is there no Subfile type, =
Thresholding, samples/pixel, and Rows/Strip on the =
&quot;thumbnail&quot;? Does this have to do with the different =
compression schemes?</FONT></P>

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2>If anyone =
can provide any information about this I would appreciate it; even it =
is read book &quot;X&quot;. Thanks.</FONT>
</P>

<P><FONT SIZE=3D2>Thom</FONT>
</P>

</BODY>
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