Half a croissant, on a plate, with a sign in front of it saying '50c'
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This would work fine, except in terms of success.

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E-smoke signals

Like wifi or Bluetooth but via camera and screen
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This is a local wireless data transmission platform that works via camera and screen. Great for blind people, this local network uses all of that otherwise unused computational power that is normally dedicated to visuality.

Say a blind student is trying to interactively choose between high quality recordings stored on a server at the front of a classroom. Rather that wait for each to download over wifi or Bluetooth, get an HD DVD's worth of data every micro second by displaying it on a screen at one end of the classroom and detecting it with a camera at the other.

There's probably something I don't understand about computers and networking here but it was fun in the time before it will have been torn apart by people who know more about computers than I do.

JesusHChrist, Nov 30 2015

the first link on youtube for smoke signals https://www.youtube...watch?v=kBEhz8vw2AM
[pashute, Nov 30 2015]

[link]






       [+] cute.
FlyingToaster, Nov 30 2015
  

       (+) I thought that this was going to be an E-cigarette distance communication device.   

       And here I thought this would be about two computer viruses infecting two computers, such that each user of the computer can cause smoke to come out of the other computer. For while, anyway, until both computers die from loss of smoke.   

       (Trivia question: Don't you know electronic stuff runs on smoke? After all, when the smoke gets out, the stuff stops working!)
Vernon, Nov 30 2015
  

       ...and mirrors, the mirrors are important.   

       I thought this would be about smoke signal recognition software, in coordination with tam tam sounds.   

       Interestingly I was not able to find any video of actual smoke signals, except just making a lot of smoke.
pashute, Nov 30 2015
  

       //an HD DVD's worth of data every micro second// how exactly is this amount of data encoded and decoded by a normal-resolution screen and camera running at normal refresh rates?
pocmloc, Dec 01 2015
  

       HDDVD and BluRay encode video in H.264, which is quite a good compression codec. I use it all the time for my output.   

       A more modern advancement of that is H265, which can take the form of HEVC or V9, and is even more efficient, facilitating 4K resolutions and at higher frame rates, without quite such a concordant multiple of data size.
Ian Tindale, Dec 01 2015
  

       // Interestingly I was not able to find any video of actual smoke signals, except just making a lot of smoke. //   

       I read the other month that smoke signals didn't communicate information themselves, but were just a signal that someone wanted to communicate telepathically (apparently).
notexactly, Dec 02 2015
  

       (marked-for-tagline)   

       " There's probably something I don't understand about computers and networking "
normzone, Dec 02 2015
  
      
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