Tracking the Roomba

I've always wondered about the efficiency of those little things and found the below to be very interesting. I kinda want one now, but I think my dog would consider it his new favorite toy.

From signaltheorist.com:

I set up a photo camera in my room, turned out all the lights and took a long-exposure shot of my roomba doing it’s thing for about 30 minutes. The result is a picture that shows the path of the roomba through it’s cleaning cycle, it looks like a flight map or something. It really hits every spot!

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