Embed new message to a image

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matlabgeek
matlabgeek 2016-1-10
编辑： matlabgeek 2016-2-11
Embed new message to a image
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matlabgeek
matlabgeek 2016-1-10
I went through these 152 posted questions, I did not find the suitable one for my questions? Could you provide me more information. Thanks
Walter Roberson
Walter Roberson 2016-1-11
Try again. I went through and tagged more that were missing the tag. However, with there being over 500 questions about steganography, I got tired and gave up after about 100.
In particular see http://uk.mathworks.com/matlabcentral/answers/195666-i-need-a-code-for-hiding-a-text-in-an-image-using-dct-technique

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Image Analyst
Image Analyst 2016-1-10
I'm not using DCT, but I attach some hiding demos for you. One to encode text and one to encode images.
See http://www.mathworks.com/matlabcentral/fileexchange/54155-encoding-text-into-image-gray-levels for the text demo.
P.S. We need to be careful about what code we share, and what language we use because the Mathworks is very cautious about hosting anything that can be considered encryption or steganography (I know from personal experience).
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Image Analyst
Image Analyst 2016-1-11
Both of them. Both demos first hide, then recover.
For that other person's question in your link, I doubt it's still a problem for them after 7 months of no activity. Anyway, I don't research compression methods. It's not worth my time when I can just use built in compression methods, like imwrite(), that other people have already written and perfected.

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