Bus Passengers' Head Detecting Based on Edge-Based Background Subtraction and Hough Transform

In order to improve the detecting rate of bus passengers,the background subtraction method is proposed,which subtracts the edge of the background from the edge of the present image.This method is influenced little by the change of light conditions and could extract the edge of the object efficiently.Hough transform is used to get the circle figure of the passengers,and then false figures are deleted through analysis on perceptual point,in order to detect the head of the passengers.The results of tests show that this method is simple,easy to operate,and the detecting rate is high,which affords a good foundation for the automatic passenger counting.