Improved spatial filtering velocimetry and its application in granular flow measurement

Kong Ping¹, Wang Bi-De², Wang Peng^{1, 3}, Zivkovic V⁴, Zhang Jian-Qing^{5, †}

(a) Conveyor belt speed measurement system. (b) Example of original image collected by the array CCD used in analysis with two regions of interest (S1 and S2) outlined.