Traffic flow measurement using stereo slit camera

We propose a new scheme of one dimensional traffic flow measurement using stereo slit camera. Both slits of the stereo configuration are aligned perpendicular to the motion direction. Stereo matching of two line images gives a pseudo cross section of the moving object at one time. Compilation along time axis gives pseudo three dimensional or two and a half dimensional information of the object. This makes the separation task very simple, and is very useful for passing vehicle counting. We applied the proposed scheme to passenger vehicle images and the result seems to be very promising.