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Raspberry Pi Car Speed Detector

(gregtinkers.wordpress.com)
187 points mhss | 1 comments | 17 May 16 15:00 UTC | HN request time: 0s | source
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finnn ◴[17 May 16 16:34 UTC] No.11714994[source]▶
"Linux Car Speed Detector" might be a more accurate description, since nothing about this seems to be specific raspberry pi hardware. Honestly, could just say "Car Speed Detector" since I'd imagine this would be pretty easy to replicate on other platforms and the OS isn't really part of it either.

Really cool project though. Now I want to start playing with OpenCV. I wish i had something more constructive to add :/

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1. morganvachon ◴[17 May 16 18:31 UTC] No.11716065[source]▶
Actually this project is pretty specific to the Pi and its camera, though it can of course be modded for other hardware.

"So it just happens that the horizontal distance covered by the Picamera’s image is roughly equal to the distance from the lens. If you are 10 feet from the lens, the image is about 10 feet across, 47 feet from the lens, about 47 feet across, and so on.

Of course, other cameras may have a different field of view and won’t have this easy to determine correspondence."