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SEM Picture
Look at the picture in Photoshop or GIMP and open a histogram view (Levels window, etc show you one). You can see that only 11 levels are used, but there is some variance about them, noise basically. I tried to separate out the noise (posterize into 11 levels then substract with the original) and enhance the contrast but nothing pops out.
I'm not sure if these are JPEG artifacts or if it was on purpose. Anyone know much about steganography?
Interestingly, there is an steganography program at http://camouflage.unfiction.com/ but it would require a password to unpack any messages. Can someone else download it and try. I can't think of more passwords.