Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
Go ahead. Stick a fork in it.

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.

user:
pass:
register,


       

Invisible Text Billboard

Billboard that displays text in Infra red
  (-3)
(-3)
  [vote for,
against]

In order to display secret messages / status reporting for security reasons, i came up with the idea of an invisible billboard.

It simply comprises of a Infra red L.E.D matrix that are connected to a computer.

It can only be viewed with a ccd camera.

So if a company such as a bank or military base or casino etc. want to display discrete signals to a security camera in view, the signals can be picked up by people observing the video.

Drawback -itcan be that it can be seen by people with cellphones. So it should be only directional to the designated camera.

novaris, Mar 04 2008

Invisibling Invisibling
[AbsintheWithoutLeave, Mar 04 2008]

[link]






       Um. The effort involved in setting up an addressible infrared billboard is surely much more than simply wiring a message feed to where the security camera ia monitored in the first place?
DrCurry, Mar 04 2008
  

       //it can be seen by people with cellphones// Erm, cellphone cameras, Shirley?   

       Explanatory experiment: Look at the infrared LED on your TV remote through a digital camera's LCD screen, and press a button on the remote. You can see the LED light up.   

       Making an advertising billboard like this might be a good publicity gimmick. Put something strange on it that can only be seen through a digital camera, and see what happens.
baconbrain, Mar 04 2008
  
      
[annotate]
  


 

back: main index

business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle