[WM]: Blind embedding

[madan mohan <madannill@yahoo.co.in>]

Hello,
 
I tried to blind embed an image. I had problems in decoding the message bits that I encoded in 32x32 image. I first converted the
image to raw format then to integer form( 0-255) range for each pixel and took first 64 pixels in the image to embed message .Tried
with different value of  Reference pattern( Wr) and alpha for blind embedding but wasn't able to obtain a good correlation result
between embedded image and the reference pattern(Wr) which by principle needs a positive value above a threshold(tlc) to decode the
image as a message bit"1" and a negative value a below (-tlc) to decode the image as a message bit"0". Testing with different values
showed me variation in sign of correlation function for the same message bit I embedded. So please me with values for Wr and alpha.
Why these variation occur?
Thank you in advance,
Madan mohan.M


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