Traffic flow measurement sensors using image processing are being installed. We have developed DTT which transforms spatio-temporal image to 2.D data onto a directional-temporal plane as a vehicle recognition met hod. However, results of the method is affected by vehicles driving on the other lane under some camera conditions. In this paper, we propose a vehicle recognition method which utilizes DTT and dynamically changes its processing area by comparing positions of the area with those of 3-P vehicle models. We also show the experimental results using real images.
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