Dai Nippon Printing(DNP), the world’s largest printing firm released a free Android app which works with DC Code, which is like popular 2D barcode “QR code” but invisible.
The app instruction is like this,
(1) download app by searching “QUEMA” on Android Market
(2) run the app
(3) hold up your Android over the printings which have digital watermark
(4) related contents (video for example) will be played from your code
DNP named the system using DC Code and smratphone reader app as QUEMA（QUick and Easy Media Access）.
Agreed that QR Codes on posters and magazines take some spaces, and that may be annoying for people who do not use QR Code. However, if it is invisible how can people notice that the code is there? Actually, touch-less radio-communication system like NFC has the same problem when you try to use it like QR Code.
via Markezine
This is an interesting post, but how does it work? How can a barcode be invisible? Any further background info? Thanks.
Kirk Lott, WebScan
The release said that it is digital watermark which human eyes can not see. You may contact DNP from their English website.
Is this technology available in America? I tried to download the app from my android market but it didnt not work.
The supported Android handset list only has the ones sold in Japan. And did you try that with the paper surely having the DC-code embedded?