Re: JPEG file internal structure

Article View: comp.os.ms-windows.programmer.win32

Article #2116

Back to comp.os.ms-windows.programmer.win32 Previous Next

#2116

From: kbhat
Date: Mon, 03 Sep 2007 14:00

17 lines
2171 bytes

On Aug 31, 10:19 am, kb...@kaxy.com wrote:
> Hi,
>
> I am looking for some information on the internal structure of a JPEG
> file.  I was playing with a handful of bits in a JPEG file as part of
> a steganagraphy experiment and I saw something remarkable.  I am able
> to cause a lateral shifting in the file.  It is as if someone has torn
> the right quarter of the picture and pasted it on the extreme left.  I
> was certainly expecting loss of clarity in the picture, but seeing
> such a remarkable phenomenon has left me completely dumbstruck.  Any
> suggestions what might be causing this?
>
> Thanks,
> Bhat


Reposting ....

Technical Details

Message-ID: <1188828042.692539.97850@19g2000hsx.googlegroups.com>

Path: arc1-ca.pugleaf.net!g2news2.google.com!postnews.google.com!19g2000hsx.googlegroups.com!not-for-mail

References: <1188573561.983094.44030@57g2000hsv.googlegroups.com>

Show Full Headers

Complete Article Headers

X-Google-Thread: 113dfb,ee6ba7d0bb2bbdd2
X-Google-Thread: 106b4a,ee6ba7d0bb2bbdd2
X-Google-Thread: 102786,b0460dd3ba0dead4,start
X-Google-Thread: 109590,b0460dd3ba0dead4,start
X-Google-Thread: fdc2a,b0460dd3ba0dead4,start
X-Google-Attributes: gid113dfb,gid106b4a,gid102786,gid109590,gidfdc2a,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: arc1-ca.pugleaf.net!g2news2.google.com!postnews.google.com!19g2000hsx.googlegroups.com!not-for-mail
From:  kbhat@kaxy.com
Newsgroups: comp.os.ms-windows.programmer.win32,comp.sources.d,rec.photo.digital,adobe.photoshop.windows,comp.graphics.algorithms
Subject: Re: JPEG file internal structure
Date: Mon, 03 Sep 2007 07:00:42 -0700
Organization: http://groups.google.com
Lines: 19
Message-ID: <1188828042.692539.97850@19g2000hsx.googlegroups.com>
References: <1188573561.983094.44030@57g2000hsv.googlegroups.com>
NNTP-Posting-Host: 63.166.115.61
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
X-Trace: posting.google.com 1188828043 12162 127.0.0.1 (3 Sep 2007 14:00:43 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Mon, 3 Sep 2007 14:00:43 +0000 (UTC)
In-Reply-To: <1188573561.983094.44030@57g2000hsv.googlegroups.com>
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4,gzip(gfe),gzip(gfe)
Complaints-To: groups-abuse@google.com
Injection-Info: 19g2000hsx.googlegroups.com; posting-host=63.166.115.61;
   posting-account=ps2QrAMAAAA6_jCuRt2JEIpn5Otqf_w0

Reply to Parent Message