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AR without markers

Hello, i want to develop an AR application that allows people create notes everywhere (saved with geolocation data). I understand that my application cannot depend on markers. So, can qualcomm sdk help me? Thanks

QCAR provides image and marker based tracking. It does not provide location based tracking (GPS, compass, etc.) - Kim

Layar and Junaio provide API's and a supporting locational service infrastructure (e.g. discovery, search, syndication etc.). There's also the Argon browser, which is probably the most programmable option but with less back end support.