implement hide using DCT

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amal
amal 2015-2-25
评论： Walter Roberson 2018-4-9
hi, i prepare a project about hide text into image using DCT, these is the algorithm
Input: Message, cover image
Output: steganographic image containing message
While data left to embed do
Get next DCT coefficient from cover image
If DCT not equal to 0 and DCT not equal to 1 then
Get next LSB from message
Replace DCT LSB with message bit
End if
Insert DCT into steganographic image
End while
thanks

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回答（1 个）

Abhishek Ballaney
https://www.mathworks.com/help/images/ref/dct2.html
  1 个评论
Walter Roberson
Walter Roberson 2018-4-9
That only talks about the DCT itself, not about the information hiding. Most of the people who struggle with the task have difficulty in converting information into binary or back from binary, or get messed up by the fact that the output is likely to be floating point instead of uint8.

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