[1] Wang W,Jia Zongpu,Chen Liwan. Rock fracture image acquisition and analysis [J]. Proc. of SPIE(S0277-786X),2007,6722:1-10.
[2] Wang Weixing,Eva Hakami. Image resolution influence on determination of resin injection rock mass [J]. Proc. of SPIE (S0277-786X),2006,6027:1-12.
[3] Miron Sebastian,Le Bihan Nicolas,Mars Jér me I. Quaternion-MUSIC for Vector-Sensor Array Processing [J]. IEEE Transactions on Signal Processing(S1053-587X),2006,54(4):1218-1229.
[4] Jin Lianghai,Li Dehua. An Efficient Color-Impulse Detector and its Application to Color Images [J]. IEEE Signal Processing Letters(S1070-9908),2007,14(6):397-400.
[5] Economou G. Detecting edges using density value [J]. Electronics letters(S0013-5194),2004,40(24):1528-1530.
[6] Bao Paul,Zhang Lei,Wu Xiaolin. Canny edge detection enhancement by scale multiplication [J]. IEEE Transactions on Pattern Analysis and Machine Intelligence(S1485-1490),2005,27(9):1485-1489.
[7] Mallat Stephane,Zhong Sifen. Characterization of Signals from Multiscale Edges [J]. IEEE Transactions on Pattern Analysis and Machine Intelligence(S1485-1490),1992,14(7):710-732.
[8] Pei Soo-Chang,Cheng Ching-Min. Color image processing by using binary quaternion-moment-preserving thresholding technique [J]. IEEE Transactions on Image Processing(S1057-7149),1999,8(5):614-628.
[9] Sangwine S J,Ell T A. Colour image filters based on hypercomplex convolution [J]. IEE Proceedings of Vision, Image and Signal Processing(S1350-245X),2000,147(2):89-93.
[10] Ruzon Mark A,Tomasi Carlo. Color edge detection with the Compass Operator [C]// IEEE Computer Society Conference on Computer Vision and Pattern Recognition,Fort Collins, CO, USA,June 23-25, 1999,2:160-166.
[11] Andreas Koschan,Mongi Abidi. Detection and Classification of Edges in Color images [J]. IEEE Signal Processing Magazine (S1053-5888),2005,22(1):64-73