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!
回答（1 个）
Walter Roberson
2019-12-9
0 个投票
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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2019-12-9
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