[1] ZHAO Feng,TANG Xiao-ou. Preprocessing and postprocessing for skeleton-based fingerprint minutia extraction [J]. Pattern Recongition(S0031-3203),2007,40(4):1270-1281
[3] Otsu N. Discriminant and least square threshold selection [C]// Proc 4IJCPR, Kyoto, Japan, Nov 7-10, 1978:592-596.
[4] Mehtre B M,Murthy N N,Kapoor S,et al. Segmentation of fingerprint image using the directional image [J]. Pattern Recognition(S0031-3203),1987,20(4):429-435.
[5] Mehtre B M,B Chatterjee. Segmentation of fingerprint images-a composite method [J]. Pattern Recognition(S0031-3203),1989,22(4):381-385.
[6] CHU Ya-yun,ZHAN Xiao-si,SUN Zhao-cai. A novel fingerprint image binarization algorithm based on orientation information [J]. Journal of Image and Graphics,2006,11(6):855-860.
[7] Liu Hong,Wan Yifei,Jain A. Fingerprint image enhancement: algorithm and performance evaluation [J]. IEEE Trans. on Pattern Analysis and Machine Intelligence(S0162-8828),1998,20(8):777-789.
[8] CHANG Ning,ZHANG Ze. Extraction and application of directional information in fingerprint image pre-processing algorithm [J]. Acta Scientiarum Naturalium Universitatis Neimongol,2006,37(2):221-226.
[9] ZHOU Yuan-yuan,ZHANG Cheng,LIN Jia-yu. Algorithms for fingerprint image preprocessing [J]. Journal of Computer Application,2004,24(9):34-36