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Isn't Soli more for natural user interface (NUI) detection via radar wave disruptions? I'm not sure it would provide very granular detection and he'd have a lot of false positives.

I was thinking more in terms of lidar tracking of people. It's been around for nearly a decade and works quite well.

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Right, Soli is built for NUI. However, it does seem like it might fit this use case as well:

Distance - I'd imagine that the distance from the top of a door frame to the top of the head of the average shopper is roughly equivalent to the distance from the Soli device to someone's hands.

Software - The Soli hardware streams radar contacts to software trained to separate and classify them, not too unlike the approach that Density is already using.

Benefits over a CV approach might come in power usage and lower complexity in the contact classification software.

Unfortunately, as far as I know LIDAR is still prohibitively expensive for this. Someone did invent a solid-state LIDAR system recently, which seems like a good sign.

Fair point. I was solely thinking from a technical solution not the practicality around deployment. My employer has biased my bubble on thought process. "Oh, yes, this is easy to solve, and I see it on campus (Disney - imagineering office).

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