[1] WANG Yongjie, PEI Mingtao, JIA Yunde. License-plate location based on multiple features [J]. Journal of Image and Graphics, 2014, 19(3): 471-475.

[2] ZHOU Lü, WANG Liang, WANG Yuming, et al. License-plate location based on fixed color assortment search and morphology [J]. Journal of Highway and Transportation Research and Development, 2013, 30(5): 118-125.

[3] LIAO Chunsheng. Car plate detection and recognition using morphological method [J]. Computer Simulation, 2012, 28(12): 353-356.

[4] HU Zhihui, MENG Yinkuo. License-plate location method based on illumination compensation and color statistics [J]. Computer Engineering and Design, 2013, 34(10): 3568-3573.

[5] TAN Jinnli, Abu-Bakar S A R. License plate localization based on edge-geometrical features using morphological approach [C]// International Conference on Image Processing, Melbourne, Australia, Sep 15-18, 2013: 4549-4553.

[6] ZHOU Xiaolong, ZHANG Xiaohong, FENG Xin. A novel license plate location algorithm based on saliency map [J]. Opto-Electronic Engineering, 2009, 36(11): 145-150.

[7] ZHANG Haopeng, WANG Zongyi. Car license plate location algorithm based on intensity variance and edge density [J]. Chinese Journal of Scientific Instrument, 2011, 32(5): 1095-1102.