Using improved Freeman chain code to RMB denomination identification
Jiao Yin · Jisuanji gongcheng yu sheji · 2012
For the process of currency denomination identification which uses of the size identification method,occurs with the problem of breakpoints,leakage points,fault points and large volumes of data when using Freeman chain code curve track the notes boundary,a new chain code method is presented for boundary locating.First of all,the starting point has been determined by statistical the frequency of the horizontal and vertical coordinates of contour points of notes,and then a new muti-directional chain code is defined to solve the image boundary points' intermittent problem,finally,chain code prior is used to forecast the chain code to reduce leakage points and wrong points,reduce the impact of noise on the curve tracking.The experimental results show that the method used for banknotes recognition,the recognition rate is more than 96.159%,the computational complexity has been reduced,the recognition speed has been increased and is an effective image boundary extraction method.