Article View: sci.crypt
Article #562Re: Random-dot stereograms
From: Marshall G. Flax
Date: Wed, 08 Apr 1992 03:26
Date: Wed, 08 Apr 1992 03:26
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1540 bytes
In article <1992Apr7.172817@sees.bangor.ac.uk> graham@sees.bangor.ac.uk (The Land of Confusion) writes: >As the information in a random dot stereogram is stored in the disparities >between corresponding dots in the pair of images, isn't it necessary to >have the plain text in advance of constructing *both* images? Nope. Here a simple algorithm. Suppose the left half has already been sent. Then take a copy of the left image, cut out the plaintext in bubble letters of the like, slide it over, and fill in the holes with more random dots. Now you have the right side image. It's not difficult at all. It's just a lot of info to transmit over secure lines!!! marshall -- +++++++++++++++++++++++++++f+++++n+++++o+++++r+++++d+++++++++++++++++++++++++++ ++++++++++++++ 40 Linden Lane|Princeton, NJ 08540|609-921-0962 ++++++++++++++ +++++ Copyright 1992, Marshall Gene Flax <mgflax@phoenix.Princeton.EDU> +++++ + c/o Jack Gelfand|Psychology Dept|Princeton University,NJ 08544|609-258-6739 +
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Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!princeton!phoenix.Princeton.EDU!mgflax From: mgflax@phoenix.Princeton.EDU (Marshall G. Flax) Newsgroups: sci.crypt Subject: Re: Random-dot stereograms Message-ID: <1992Apr8.032639.28004@Princeton.EDU> Date: 8 Apr 92 03:26:39 GMT References: <6568@skye.ed.ac.uk> <1992Apr7.172817@sees.bangor.ac.uk> Sender: news@Princeton.EDU (USENET News System) Organization: Princeton University Lines: 18 Nntp-Posting-Host: phoenix.princeton.edu