Re: [WM]: Discussion on Printed Paper watermarking

["MARY LYNNE HALLOT" <2370447@uwc.ac.za>]

Message to D. Gordon.
Forgive the halfnote. What I meant was could one use a system that uses a = process of what artists call a 'high or low bass relief'
method in the = print itself(I refer to the paint that renders the letter). I will = elaborate by asking if one could embed a system
whereby the scanner can = roll over a specific specified area a few times in a braille like idea so = that the paint is slighly
raised, so that when the document is viewed and = the text is shown it can show various areas with one tiny text letter a = couple
of braille notes. This might be too slight to see with the human = eye but used under high microscopic conditions or when paper is
held up to = the light a message can be detected. If this can be done then it would be = a cheap and easy system to implement and
the next problem would be to = ensure that Optical Character Recognition (OCR) cannot reinterpret the = font.

Mary-Lynne H'allot;
PhD Student; 
Computer Science Department;
University of the Western Cape
http://www.cs.uwc.ac.za/~charlie/
>>> "Douglas Gordon" <medsec@compmore.net> 10/06/04 12:59 PM >>>
I am not sure I fully understand your question, can you elaborate on what you have in mind. If I do read this correctly the short
answer is yes.

Regards,

Doug Gordon

----- Original Message ----- 
From: "MARY LYNNE HALLOT" <2370447@uwc.ac.za>
To: <watermarking@watermarkingworld.org>
Sent: Tuesday, October 05, 2004 3:28 PM
Subject: Re: [WM]: Discussion on Printed Paper watermarking


> Question to Voloshynovskiy
> Could one use a devise that can embose certain words or letters on
> paper
did for typewritersmark on the copy, something like a
> Mary-Lynne H'allot;
> PhD Student;
> Computer Science Department;
> University of the Western Cape
> http://www.cs.uwc.ac.za/~charlie/
> >>> Sviatoslav Voloshynovskiy <svolos@cui.unige.ch> 10/05/04 20:36 PM
> >>> >>>
> Hi,
>
> ....... several more comments to Miroslav email:
>
> Watermarmarking of printed documents is a very important issue where a
> lot
application which defines:
> - security requirements;
> - printing/scanning resolution;
> - halftoning/inverse halftoning technique (if you do not use
> continuous
applications);
> - embedding rate;
> - special tricks that avoid a possibility of copying or enabling
self-authe- key management protocol;
> - complexity at the detector/decoder side;
> - integration into printing process.
>
> ......... so complex.....
>
> If there are not special requirements, one might think just to use simple
practical problems and providing low-cost solution.
>
> Regards,
> Slava Voloshynovskiy
>
>
> mgoljan@binghamton.edu wrote:
>
> >IMHO, the important issue here is the cost. The second, well, it is
> >the cost again. The third, we can use math to prove that the digital
watermark has desired properties.
> >
> >Miroslav Goljan, SUNY Binghamton
> >
> >
> >
> >
> >>Dear all,
> >>If there is many of techniques to watermark paper using physical
> >>material such as holograms,.... and they are still exist in the
> >>paper  even if the paper is damaged, why we try to find watermarking
> >>algorithm using digital techniques..even most of theses are week
> >>after print scan....I would like to know your opinion about the
> >>importance  of digital watermarking for print security over the physical
methods.
> >>Please reply to the the watermark group so we can listen to all
> >>opinion thanks
> >>
> >>
> >>Khaled Walid Mahmoud
> >>ZPU University
> >>P.O.Box 2000
> >>Zarka - 13110
> >>Jordan
> >>Email
> >>        (work): k.w.mahmoud@zpu.edu.jo
> >>        (Home):kwkmmsy@yahoo.com
>


______________________________________________________________________________

Watermarking Mailing List - http://www.watermarkingworld.org/ml.html
To unsubscribe send email to "majordomo@watermarkingworld.org" with
"unsubscribe watermarking YOURMAIL" in the body.
______________________________________________________________________________