1. Zhang, X., Bian, Z.: Pattern Recognition. Tsinghua University Press, Beijing (August 2004)
2. Wang, J., Linlin, C.l., Yao, K.: A Survey of Feature Selection. Computer Engineering and Science 27(12), 68–71 (2005)
3. Jiang, X.: Digital Image Pattern Recognition Engineering Software Design. China Water Power Press, Beijing (2008)
4. Gonzalez, R.C., Woods, R.E.: Digital Image Processing, pp. 643–665. Electronic Industry Press, Beijing (2007)
5. Miao, J.: Research of Image Retrieval Technology based on Shape feature. Chang Chun University of Technology (March 2009)