how to perform the watermarking with cryptography?
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Neethu
am 19 Nov. 2014
Kommentiert: Image Analyst
am 22 Nov. 2014
hi....
I want to embedded an encrypted watermark to a cover medium and to evaluate the quality of extracted watermark after decryption...The watermark embedding must be in DCT domain. How should I write the code for performing this operation? Anybody having the code for reference?
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Geoff Hayes
am 21 Nov. 2014
Neethu - you need to explain what your code is attempting with the decryption. Why have you written it this way?
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Image Analyst
am 21 Nov. 2014
If op is uint8, then r must be uint8. If op is uint16, then r must be uint16. It does not let you mix integer types when doing operations on them together. In other words, if op is uint8 and r is uint16, it won't allow that. Your code is more than I want to take the time to read and understand, so it's up to you to figure out what integer type they are and what you need, and make them match. You can use the functions cast(), typecast(), uint8() and uint16() to do any necessary conversion(s).
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