How can I calculate my car's speed from a dash cam video?

asked 2017-04-13 11:08:40 -0600

I have a dash camera on my windshield, and I'm wondering if there is any way to determine my vehicle's speed using the video footage from the dash cam. Please help!

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first of all: https://en.wikipedia.org/wiki/Pinhole...

berak ( 2017-04-13 12:24:54 -0600 )edit

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answered 2017-04-14 04:42:23 -0600

StevenPuttemans

20029 ●16 ●82 ●207 http://stevenputtemans...

Possible approach you can implement

For your video input, grab single frames
Calculate keypoints in every frame
Match keypoints in subsequent frames and calculate the optical flow
Relate the optical flow values to actual speed values (will need some kind of calibration for the car I guess)