This paper provides how to obtain data through public camera lens, on the one hand, efficiently reduce the cost of the experiment so that the experiment can be completed smoothly, on the other hand, it shows how to obtain data processing by video processing, mainly divided into three directions, Firstoptical with flow to The different detect the two two frame sings, then using two different graphs in time to get the difference, to determine which item is moving, and finally with algrothims to remove the shadow of the object, used to use Exclude the error value that appears on the exclusion experiment.
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