[3] JOSE C, VICTOR M. New result on the theory of morphological filters by reconstruction[J].Pattern Recognition, 1998,31(4):419-429.
[4] PEI S C,CHEN F C. Subband decomposition of Monochrome and color images by mathematical morphology[J]. Opt Eng,1991,30(6):921-933.
[5] PEI S C, CHEN F C. Hierarchical image representation by mathematical morphology subband decompositon[J].Pattern Recognit Lett, 1991, 16(1): 183-192.
[6] LEE C K, WONG S P. A mathematical morphological approach for segmenting heavily noise corrupted images[J]. Pattern Recognition, 1996, 29(8): 1347-1358.
[7] CANNY J. A computational approach to edge detection[J]. IEEE Trans, Pattern Anal.Machine Intell, 1986, 8(6): 679-698.