Return-Path: <tiff-bounces@lists.maptools.org>
X-Original-To: info@awaresystems.be
Delivered-To: info@awaresystems.be
Received: from mx-a.b-one.net (mx-a.one.com [91.198.169.48])
	by mail9.b-one.net (Postfix) with ESMTP id DB32D40080A
	for <info@awaresystems.be>; Thu, 11 Feb 2010 21:10:32 +0100 (CET)
Received: by mx-a.b-one.net (Postfix, from userid 106)
	id BE29F13E919B; Thu, 11 Feb 2010 21:10:32 +0100 (CET)
X-Virus-Scanned: by one.com
X-Spam-Score: 0.001
X-Spam-Level: 
X-Spam-Status: No, score=0.001 tagged_above=0 required=4
 tests=[HTML_MESSAGE=0.001]
X-Greylist: domain auto-whitelisted by SQLgrey-1.7.4
Received: from lists.maptools.org (lists.maptools.org [65.39.174.144]) by
 mx-a.b-one.net (Postfix) with ESMTP id 8BE4D13E7E7C for
 <info@awaresystems.be>; Thu, 11 Feb 2010 21:10:31 +0100 (CET)
Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by
 lists.maptools.org (Postfix) with ESMTP id 4D5B71D20249D; Thu, 11 Feb 2010
 15:09:01 -0500 (EST)
Received: from smtp121.dfw.emailsrvr.com (smtp121.dfw.emailsrvr.com
 [67.192.241.121]) by lists.maptools.org (Postfix) with ESMTPS id
 840311D2024B1 for <tiff@lists.maptools.org>; Thu, 11 Feb 2010 14:45:54 -0500
 (EST)
Received: from relay12.relay.dfw.mlsrvr.com (localhost [127.0.0.1]) by
 relay12.relay.dfw.mlsrvr.com (SMTP Server) with ESMTP id 6AE2B20802F2 for
 <tiff@lists.maptools.org>; Thu, 11 Feb 2010 14:45:53 -0500 (EST)
Received: by relay12.relay.dfw.mlsrvr.com (Authenticated sender:
 pwatkins-AT-crawfordtech.com) with ESMTPA id 387D020802CF for
 <tiff@lists.maptools.org>; Thu, 11 Feb 2010 14:45:53 -0500 (EST)
From: "Philip Watkinson" <pwatkins@crawfordtech.com>
To: <tiff@lists.maptools.org>
Date: Thu, 11 Feb 2010 14:45:52 -0500
MIME-Version: 1.0
X-Mailer: Microsoft Office Outlook, Build 11.0.5510
Thread-Index: AcqrUtGYOFSx4q60SASMbxWOd7rvEQ==
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3350
Message-Id: <20100211194553.387D020802CF@relay12.relay.dfw.mlsrvr.com>
Subject: [Tiff] JPEG files created with Adobe Photoshop
X-BeenThere: tiff@lists.maptools.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: TIFF and libtiff discussion <tiff.lists.maptools.org>
List-Unsubscribe: <http://lists.maptools.org/mailman/listinfo/tiff>,
 <mailto:tiff-request@lists.maptools.org?subject=unsubscribe>
List-Archive: <http://lists.maptools.org/mailman/private/tiff>
List-Post: <mailto:tiff@lists.maptools.org>
List-Help: <mailto:tiff-request@lists.maptools.org?subject=help>
List-Subscribe: <http://lists.maptools.org/mailman/listinfo/tiff>,
 <mailto:tiff-request@lists.maptools.org?subject=subscribe>
Content-Type: multipart/mixed; boundary="===============1255429691=="
Mime-version: 1.0
Sender: tiff-bounces@lists.maptools.org
Errors-To: tiff-bounces@lists.maptools.org

This is a multi-part message in MIME format.

--===============1255429691==
Content-Type: multipart/alternative;
	boundary="----=_NextPart_000_0019_01CAAB28.E934E5C0"

This is a multi-part message in MIME format.

------=_NextPart_000_0019_01CAAB28.E934E5C0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit

I'm working with JPEG files that were created by Adobe Photoshop. When I
decompress the files, the images appear as black. After seaching the
internet, I found some information. It appears Adobe Photoshop inverts the
values in a CMYK JPEG file.
 
Some people have tried to use the Adobe APPE marker to correct the problem.
This will not work consistently because other applications have
unintentionally used the marker too but they are not inverting the data.
 
Looking at JPEG files in a HEX editor, I do see the text "Adobe Photoshop
CS2 Windows" near the beginning of the file and a little further down I see
"Photoshop 3.0".
 
Questions:
1. Is there any consistent way to identify this problem in a JPEG file or do
I need to add a configuration parameter?
2. Does this problem appear in all version of Photoshop?
 
Thanks for any help, Philip

------=_NextPart_000_0019_01CAAB28.E934E5C0
Content-Type: text/html;
	charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Dus-ascii">
<META content=3D"MSHTML 6.00.6000.16850" name=3DGENERATOR></HEAD>
<BODY>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial size=3D2>I'm =
working with=20
JPEG files that were created by Adobe Photoshop. When I decompress the =
files,=20
the images appear as black. After seaching the internet, I found some=20
information. It appears Adobe Photoshop inverts the values in a CMYK =
JPEG=20
file.</FONT></SPAN></DIV>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial size=3D2>Some =
people have=20
tried to use the Adobe APPE marker to correct the problem. This will not =
work=20
consistently because other applications have unintentionally used the =
marker too=20
but they are not inverting the data.</FONT></SPAN></DIV>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial =
size=3D2>Looking at&nbsp;JPEG=20
files in a HEX editor, I do see the text "Adobe Photoshop CS2 Windows" =
near the=20
beginning of the file and a little further down I see "Photoshop=20
3.0".</FONT></SPAN></DIV>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial=20
size=3D2>Questions:</FONT></SPAN></DIV>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial size=3D2>1. Is =
there any=20
consistent way to identify this problem in a JPEG file or do I need to =
add a=20
configuration parameter?</FONT></SPAN></DIV>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial size=3D2>2. =
Does this problem=20
appear in all version of Photoshop?</FONT></SPAN></DIV>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D659133019-11022010><FONT face=3DArial size=3D2>Thanks =
for any help,=20
Philip</FONT></SPAN></DIV></BODY></HTML>

------=_NextPart_000_0019_01CAAB28.E934E5C0--


--===============1255429691==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________
Tiff mailing list: Tiff@lists.maptools.org
http://lists.maptools.org/mailman/listinfo/tiff
http://www.remotesensing.org/libtiff/
--===============1255429691==--
