[WM]: low freq & Middle-High Freq. watermarking

[krutarth bhatt <krutarthbhatt@yahoo.co.in>]

Hello All
 
I have some doughts from the paper 
 
"Discrete Wavelet Transform based multiple watermarking scheme" 
 
By Raval Mehul & Rege Priti P. 
 
(1) Authors say that low frequency embedding are robust to geomatrical attacks 
 
(2) Middle & High frequency watermarks are robust to Noise adding & Nonlinear deformations of gray scale.
 
I dont understand how they are ?
 
can someone clarify my doughts?
 
Thanks in advance.
 
Krutarth

	


______________________________________________________________________________

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