[1] Jia H G, Yuan Y S, Liu Z. Design and implementation of colorful two-dimensional barcode for Chinese character with high compression ratio[J]. Journal of Zhejiang University of Technology, 38, 561-565(2010).

[2] Querini M, Grillo A, Lentini A. 2D color barcodes for mobile phones[J]. International Journal of Computer Science and Applications, 8, 155(2011).

[3] Li C H. Study on the color two-dimension barcode based on image processing[D]. Tianjin: Tianjin Polytechnic University(2009).

[4] Liu T, Zhao J. -03-26[P]. Liu L Z. Encoding method of matrix color two-dimensional bar code: 110149813A .(2008).

[5] Zheng H R, Yuan S Y, its encoding, decoding method: 101515335A [P]. -08-26(2009).

[6] Huang J, Qian W M, Xiong C F. Method. -11-16[P]. system for generating color bar code, method, system for analyzing color bar code: 102243712A.(2011).

[7] Xu M Y. Design and implementation of color multi-dimensional code application system based on biometric[D]. Wuhan: Huazhong University of Science and Technology(2016).

[8] Guan T. Design and research on colorized data matrix barcode[D]. Beijing: Tsinghua Univesity(2006).

[9] Akman E, Cerkezoglu E. Compositional and micro-scratch analyses of laser induced colored surface of titanium[J]. Optics and Lasers in Engineering, 84, 37-43(2016).

[10] Adams D P, Murphy R D, Saiz D J et al. Nanosecond pulsed laser irradiation of titanium: Oxide growth and effects on underlying metal[J]. Surface and Coatings Technology, 248, 38-45(2014).

[11] Liu Z M, Zhang Q M, Guo L et al. Influence of laser process parameters on color obtained by marking[J]. Chinese Journal of Lasers, 41, 0403011(2014).

[12] Li X S, He W P, Lei L et al. Process and optimal parameter domain of laser marking two-dimensioncode[J]. Chinese Journal of Lasers, 41, 0703006(2014).

[13] Qiu H D, Lu C H, Xiao R J. Laser parameters influence in direct-part marking barcodes on aluminum alloy[J]. Chinese Journal of Lasers, 38, 0803006(2011).

[14] Kanungo T, Mount D M, Netanyahu N S et al. An efficient k-means clustering algorithm: analysis and implementation[J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 24, 881-892(2002).

[15] Velmurugan T. Performance based analysis between k-means and fuzzy C-means clustering algorithms for connection oriented telecommunication data[J]. Applied Soft Computing, 19, 134-146(2014).

[16] Engelbrecht A P. Data clustering using particle swarm optimization. [C]∥The 2003 Congress on Evolutionary Computation, 2003. CEC '03., Canberra, ACT, Australia. IEEE, 215(2003).

[17] Nor Hazlyna H, Mashor M Y, Mokhtar N R et al. Comparison of acute leukemia image segmentation using HSI and RGB color space. [C]∥10th International Conference on Information Science, Signal Processing and their Applications (ISSPA 2010), May 10-13, 2010. Kuala Lumpur, Malaysia. IEEE, 749(2010).

[18] Feng Y, Ren G, He K et al. RGB color channel variation based segmentation of crop leaf lesion. [C]∥ IEEE Conference on Industrial Electronics & Applications. IEEE(2015).