[ale] OT: Video Motion Sensor

[Jeff Hubbs]

Using video, you could conceivably create an algorithm that would 
estimate speed, bearing, and collision likelihood of an oncoming car, 
but you'd be working at the edge of the state of the art 
programming-wise and I think you'd still be fairly inaccurate (try 
detecting both a motorcycle and a car with the same method).  You'd be 
far, far better off with a radar or lidar rig.

Jim Popovitch wrote:

>So, I'm driving around during lunchtime today and just as I am 
>approaching an intersection to make a right turn (I had the quite green 
>light), out of nowhere a car flies through the intersection and nearly 
>hits me on the drivers side.  My attention was focused on the right-hand 
>turn I was making, so I did not see the car approaching (at a high rate 
>of speed) from my left.  I had just looked to the left seconds before 
>and did not see any vehicle approaching my area of the intersection. 
>Fortunately he missed me and thankfully he and I both made it through 
>the intersection safe.
>
>This episode got me to thinking about using cheap video cameras to 
>detect large "items" approaching at considerable speed.  Obviously there 
>would have to be a way to determine my speed and direction, as well as 
>the speed and direction of the inbound vehicle and then some calculation 
>to determine/measure a potential threat.  Does anyone know of 
>software/projects/devices that do this sort of thing?
>
>-Jim P.
>
>
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