I am trying to code DWT based steganography to hide an image inside another image. I am getting coefficients of subbands as float. How can I make them integers so that I can use lsb embedding?
This is also known as Integer Wavelet Transform. In Matlab this is achieved using lifting schemes . Define a lifting scheme with liftwave
and use lwt2
and ilwt2
for the transformations.
lshaar = liftwave('haar','int2int');
[cA cH cV cD] = lwt2(x,lshaar); % x is your data
ilwt2(cA,cH,cV,cD,lshaar);
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