Program that stores text in the pixels of an image...
Slava, Tue Aug 16 2016, 11:33PMThis 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/
Re: Program that stores text in the pixels of an image...
Conundrum, Sun Aug 21 2016, 08:41AM
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.
Conundrum, Sun Aug 21 2016, 08:41AM
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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