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Raspberry Pi Car Speed Detector

(gregtinkers.wordpress.com)
187 points mhss | 4 comments | 17 May 16 15:00 UTC | HN request time: 0.876s | 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. lijason ◴[17 May 16 18:15 UTC] No.11715937[source]▶
Isn't that true for all Raspberry Pi projects by the very nature of Raspberry Pis? They're just a different form factor and cost than other Linux machines, but otherwise are just a Linux box.
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2. khedoros ◴[17 May 16 18:28 UTC] No.11716044[source]▶
To a degree. Most Linux boxes don't have a couple dozen programmable IO pins and the other connectivity options for external sensors and such.

In the case of this project, you'd also have to do some modifications on the image-grabbing code. They're using a module that's specific to the Raspberry Pi camera module.

3. finnn ◴[17 May 16 18:28 UTC] No.11716047[source]▶
No. There are some that actually use the Raspberry Pi hardware, such as PiFM[0]. Others merely use GPIO, which of course can work on a number of other SBCs (eg a Beaglebone Black) or anything with GPIOs. The only Raspberry Pi specific thing here is how it connects to the webcam, because the Raspberry Pi doesn't expose the camera as a standard v4l device, they have their own way of doing it.

[0]: https://github.com/ChristopheJacquet/PiFmRds

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4. khedoros ◴[17 May 16 18:30 UTC] No.11716060[source]▶
Well...there is a V4L2 driver for the Pi camera. Strictly speaking, they didn't have to use the picamera module.