A vehicle is traveling in a straight path of road and a camera is placed in the middle of the road that has clear vision of the said vehicle traveling along that road. Is it possible to calculate the speed of the car by just taking 2 points in a fixed time where the camera records the change in size of the car due to the perspective vision of the camera? If so is it possible to do the same in an inclined road like a straight road path made on hills?

Question

anonymous · Answer

Theoretically it should be possible.. to calculate the velocity
but i dunno whether the relation between "rate of change of area due to perspective and the velocity" is the same for all, or does it depend on the optical system liek the diamater of the aperture.. but theoretically it makes a lot of sense .. 
and if its possible on straight road, i don't see any difference when applied to inclined.. 

I mean even if the car goes in 2 dimensions (like go up or down and also near or away from teh cam), you can calculate each component and then calculate the net.. 

but regardless i dunno how is it gonna be better than a radar gun.. cause this would need enormous processing of the image .. and complicated piece of software to do it.. where as a radar gun is available for a cheap price :P

anonymous · Answer

thank you for giving your view on this :)
sry it took this long to reply, i was in an argument with my friend so just check back for the answer and didnt bother re-opening this website nor replying for your opinion :)