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I'm an AR novice, but with lots of software development and computer vision experience.

I'm starting to put together a demonstration project and could use some advice on the best AR glasses and SDK to demo it with. It involves placing simple visual markers on customers as they move freely around a store. I want to be able to, for example, place colored arrows over customer's heads, and keep them smoothly in position as either the customers, or the salesperson wearing the glasses, move around. The glasses should be as lightweight and unobtrusive as possible, as they'll be worn for long periods of time and while interacting face-to-face with customers. Price is not as important as making a good impression with the demo.

What glasses and SDK would you recommend using for a project like this? Any other recommendations? Thanks!