I just saw a great link from Shapeways about using the 3d printer to create a stamp of a QR code. Using ink on the stamp and pressing it on a surface leaving a valid QR code impression.

This of course works as an idea on so many levels. It did remind me of the conversation we have round the invention of the printing press and the liberation of thought through that. It also took me back to my childhood with the John Bull printing set. We had small rubber and wooden letters that we lined up in a holder to print sentences.

(Image from http://www.metaltype.co.uk/ )
It also struck me that this is a great way to place Augmented reality tags too. QR codes are great in that they encode URL information, they can even be updated live as in Andy Sc’s QR code clock. However placing the markers and tags means they need to be physically rendered somehow if your are doing AR.
The marker here from this old demo was printed via a regular printer and pasted on a board. How cool would it be to be able to place those markers using a 3d printing stamp?

That then got me thinking……
The problem with an AR code marker is that on its own there is not an indication of what it was intended to relate to. It is just a token marker. So stamping AR tags all over the place are meaningless without context. QR codes on the other hand are more detailed versions of a bar code containing things like urls and other indicators.
So without having to reinvent any standards the AR marker could also include context with a QR marker indicating the context and even where to get the model or the rendering for the AR tag. That combined stamp could then be applied. Just as with any URL then the value of what the QR code points to could be adjusted as needed, updating what the AR does with the tag. An ARRI Augmented Reality Resource indicator.