To improve the accuracy rate of passenger flow estimation during rush hour

a vision based procedure to estimate passenger flow in buses was presented for the embedded application.The contour feature of the passenger’s head was exploited to locate every passenger’s position.In order to eliminate the false candidate head contour effectively and obtain the position of every passenger accurately

the modification of the Hough Transform to detect quasi circle and the perceptual grouping with fuzzy measures were applied.The results of field tests show the accuracy rate may reach above 85 percent by using the proposed method to estimate the passenger flow in bus.