Re: [WM]: Discussion on Printed Paper watermarking

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

Hi, 
The reason is that if a a document were subjected to Optical Character Recognition(OCR) software, it can be  to decipher a document and place the = type in another font and an old method watermark can be
used on another = piece of paper then the document will be considered legal.
The aim is to ensure that when information is output on paper that when = using the OCR method it cannot be deciphered and any form
of reproduction = will show up in the end product so that even the lay purson can identify = it.
A method has been used where spacing is altered within radom slections of = word and text. This idea is good as it is visible to the
eye. However when = you subject it to OCR you can then reapply it in the manner I have spoken = about above and hence we are back to
step one.
Hope this helps. I would be interested in ideas.
Mary-Lynne H'allot;
PhD Student; 
Computer Science Department;
University of the Western Cape
http://www.cs.uwc.ac.za/~charlie/
>>> khaled Mahmoud <kwkmmsy@yahoo.com> 10/05/04 16:06 PM >>>
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.
______________________________________________________________________________