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What is the difference between digital invisible watermarking done using DCT and software programs?

April 26, 2017dct difference digital Engineering invisible Mathematics Programs Software watermarking

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What is the difference between digital invisible watermarking done using DCT and software programs?

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DCT (Discrete Cosine Transform) is an algorithm and can be implemented in software. So, if the software program implements DCT for watermarking, there is no difference. If the program uses another algorithm, the way the watermark is hidden in the contents bits will probably be different from DCT.