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Greenfoot back

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timtour97
timtour97 presents ...

2013/10/18

StegPic

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1848 views / 2 in the last 7 days

Tags: hide cat pic steganography

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A new version of this scenario was uploaded on Fri Oct 18 01:02:40 UTC 2013 Call the methods in this particular order: degrade, hide, show (allows the program to function correctly).
A new version of this scenario was uploaded on Fri Oct 18 01:03:14 UTC 2013 Call the methods in this particular order: degrade, hide, show (allows the program to function correctly).
A new version of this scenario was uploaded on Fri Oct 18 01:08:23 UTC 2013 Added an act method, like there should've been
A new version of this scenario was uploaded on Fri Oct 18 01:11:24 UTC 2013 Fixed the act method so that it correctly functions.
timtour97timtour97

2013/10/18

Although it is extremely fast, what happens is that the image of the cat looking into space is show first. The four bits to the very left that make up each pixel of the image are shifted to the right and shifted back over to clear them. Then, the other image, the cat in the astronaut helmet's first four bits that make up each pixel are placed into the other image's last four spots that were cleared. Lastly, the new image's pixels are shifted over to the left 28 spots to clear the original picture and then shifted back 24 to display the new image. tl;dr Image is hidden in last four bits of another image and displayed

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