 Program that stores text in the pixels of an image...
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Slava
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Tue Aug 16 2016, 11:33PM
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Registered Member #518
Joined: Tue Feb 13 2007, 05:20AM
Location: New York
Posts: 168
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This program allows the user to store text data inside of the pixels of an image. The text data is converted to a binary number string. Then it is stored in the pixels by setting the red color channel to either an even value or an odd value. Even represents a binary 1 and odd represents a binary 0. To convert an odd to even or even to odd, a 1 is added to the red channel in a pixel.
http://persion.info/projects/cs-bitmap-packer/
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Conundrum
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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
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Yeah, have seen this sort of steganography before.
Interestingly it is one surefire way to tell if an image has been manipulated, as it does not (usually) survive smaller resizing, lossy compression and other tools.
I did hear that the commercial MRI scanners use a variant of JPEG (JPEG2000) that can be reversed by comparing with the original files to recover the raw DICOM without uploading the whole dataset again.
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