5Lee J S J, Haralick R M. Morphology edge detection[ J]. IEEE Transon Robotics Automat, 1987, (3) : 140- 156.
6Song J, Delpe J. The analysis of morphological filters with multiple structuring elements [ J ]. Computer Vision Graphics and Image Processing, 1990, 50:308 -328.
7Odier Demigny. On Optimal Linear Filtering for Edge Detection. IEEE TRANSACTIONS ON IMAGEP POCESSING, 2002.
8P Soille. Morphological Image Analysis-Principles and Applications. Pringer-Verlag,Berlin, 1999.