Which Dct Algorithm is used ?
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Hello,
Can anyone tell me that which algo is used in this dct watermarking code or anyone who already used that code? Here is the link
Thanks in advance!
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Answers (1)
Walter Roberson
on 9 Dec 2019
https://www.mathworks.com/help/images/ref/dct2.html#d117e44015 describes the Discrete Cosine Transfer
dct2 does dct(), transposes the array, and does dct() again.
dct() that is invoked is a private function, not the public dct from the signal processing toolbox. However, the two use the same internal structure; fft() and multiply by weights.
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