RE: [WM]: Hi - SSIS

["Marvel, Lisa \(Civ,ARL/CISD\)" <marvel@arl.army.mil>]

Stegopixel(k) = originalpixel(k) + real_valued_noise(j,k); 

Where 
k = [0,number of pixels in image]
And 
j = [0,1] indicated the two sequences of Real valued Gaussian Noise = samples dictated by the piecewise linear noise modulation
and the binary = data you want to hide

Hope this helps

Lisa

-----Original Message-----
From: watermarking-owner@watermarkingworld.org = [mailto:watermarking-owner@watermarkingworld.org] On Behalf Of Amar = Buchade
Sent: Monday, September 05, 2005 3:09 PM
To: watermarking@watermarkingworld.org
Subject: [WM]: Hi

  Dear all,
   I am implementing 'spread spectrum image steganography' a paper by = Lisa Marval.
   In that case i have to add noise.Noise contains original image and = our data which is to be hidden.
   So how to add the noise in image and where to add( i mean in which location) the noise?
    I am waiting for response.


Yours sincerely,
Amar R Buchade
In=ia


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