I want to build a web app (Html5 + Javascript, NO flash) than, using the smartphone camera, scan a QR code, and sends the result to a server. Is that posible?
Thanks!
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Yes, yes it is possible:
How to create a QR code reader in a HTML5 website?
hope that helps.
There would be lots of libraries and examples out on the internet. I would suggest googling it and checking out some open source projects.