[WM]: informed embedding n coding

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

Hello,
 
I'm  testing E_DIRTYPAPER/D_DIRTYPAPER with different images now for single bit embedding. Got lot of errors in my process. 
 
Have taken a image c[128]  found vo[64] then according to message found srand( seed+m) and produced a random pattern wr[64] and
added to the image c[128] as per E_DIRTYPAPER  to give new c'[128]
 
tcc=0.2, r=0.4;( also varied for different combination of this value)
 
For testing I embedded the same message on different image but got lot of errors.
 
Even I tried out E_TRELLIS8/D_TRELLIS8 to embed  8 bits. 
In the algorithm, they made a message pattern which wm=wm(+ (or) - )wr
 
Though wr(random pattern) is generated according to the bitNum ( bit position), state, seed and Numbits( no of bits) finally
wm(message pattern) is generated which is the summation of all the wr generated  for each message bit.
 
I dont know how a message can be got back after all values of wr is summed together.
And finding correlation between newly generated pattern and watermarked image.
 
If some has tried the algorithm please help me. I worked on this project for    
3 months for trying out this wonderful concept. I'm greatful to all those helped me in this -----prof. Jeffrey Bloom, Mr. Frank
Ling,  tpj and others. I will be very thankful if some can help me with final process. 
 
Thank you in advance,
 
with regards,
Madan mohan
 


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