[WM]: Barni paper

["Water Mark" <watermarking24@hotmail.com>]

Hi all,
   I have been looking at a paper by Barni et al. "Improved Wavelet-Based Watermarking Through Pixel-Wise Masking". I have a query
about how to determine the threshold. They come up with a formula for the Pf which is given aas a function of erfc (complementary
error function). The authors put a constraint on Pf such that it is less than 10 to the power of -8. They end up with a value of
3.97 in the calculation of the threshold value and I was just wondering if anyone could explain how they go from one equation to the
other.

Regards,
Michael


______________________________________________________________________________

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