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Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: DWT watermarking
Replies: 1   Last Post: Mar 8, 2013 11:13 PM

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Shaun VanWeelden

Posts: 15
Registered: 2/23/12
Re: DWT watermarking
Posted: Mar 8, 2013 11:13 PM
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"ajeet singh" wrote in message <kh4dac$fr7$1@newscl01ah.mathworks.com>...
> I am working on wavelet transform based watermarking. In this i have taken an medical image 256X256 and taken 2 level wavelet transform.then selected diagonal and vertical sub bands for watermarking.now convert these two sub bands in to 2x2 blocks of matrices
>
> i have taken another image as a hospital logo of 64x64.
>
> now i have some information in the form of name,dr.name,age of patient etc i have convert it in to binary.
> now i have watermark as
> Bhh=brk+Rk if the information bit is 0
> =brk-Rk if the information bit is 1
> here brk is the sub band r shows subband no and k is the block no(2x2 matrix) and Rk is the 2x2 matriices of hospital logo.how i watermark plz provide solution if possible with coding.i will be very thankful to you all.


Ajeet, what are you trying to do acutally??



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