A project log for itanimulli code crackers

cracking the code of the itanimulli riddle

Moritz WalterMoritz Walter 12/13/2015 at 20:194 Comments

As today, the new chapter page of the riddle got an upgrade, it's the image of a waterfall.

Suspiciously lossless packed into a png file, hmmmm.

So first let's have a look at the LSBs..

Ah, FEZ code again, but we have to seperate the three color channels (the alpha channel doesn't seem to have hidden data in the LSB).

Also, mind the little marker in the left upper corner. Seems to be an orientation mark.




Unfortunately I don't have time right now to decipher this right now, but will do soon!


davedarko wrote 12/14/2015 at 10:07 point

So the last significant byte of each color encodes to one or zero and doesn't impact quality visually 'because humans'? 

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Moritz Walter wrote 12/14/2015 at 12:13 point

Almost, it's the least significant bit of each color channel. Why it is unnoticeably? First, the 16M colors of 24 bit are very close to what a human eye cannot differenciate anymore, and second, unless you're working in the print or broadcast sector, your screen is probably crap. Still, if the LSB changes in more than one channel across a line or something (i.e. color banding, hidden symbols), you might be very well able to tell. The waterfall and the grain of the photo helps covering this.

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alpha_ninja wrote 12/14/2015 at 04:50 point

Whoa, that lsb composite looks awesome!

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Moritz Walter wrote 12/14/2015 at 07:51 point

agree, would make a nice carpet

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