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I need a code for DFT based watermark embedding and extracting.please help
need a code for dft based embedding and extracting of watermark
9 years ago | 1 answer | 0
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answerQuestion
f(8,8) = w(count) * alpha. In the given code are we not altering the low frequency dct coefficients? Why is it f(8,8) but not f(1,1)
xx=imread('twitter64.png'); %xx=rgb2gray(xx); watermarkImage = im2double(imresize(xx,[64 64])); w = watermarkImage(:); r1=...
9 years ago | 0 answers | 0
