Haralick R M. The digital step from zero crossings of second directional derivatives.IEEE PAMI, 1984, 6(1).
Canny J F. A computational approach to edge detection.IEEE PAMI, 1986, 8(6).
Clark J J. Authenticating edges produced by zero-crossing algorithm.IEEE PAMI, 1989, 11(1).
Bomans H, Hoehne K Het al. 3D-segmentation of MR-images of the head for 3D-display.IEEE Trans. Med. Imaging, 1990, MI-9(2).
Hoehne K H, Riemer Met al. Viewing operations for 3D-tomographics gray level data. InProc. CAR’87 Lemke Het al. (eds.), Berlin, 1987.
Hoehne K H, Hanson W A. Interactive 3D-segmentation MRI and CT volumes using morphological operations.J. Comput. Assist. Tomogrof, 1992, 16(2).
Cai Wenli, Shi Jiaoying. Composed scattering model based on equation of transfer.Journal of Computer Science and Technology, 1996, 11(5): 433–442.
Marr D, Hildreth E. Theory of edge detection. InProc. Roy. Soc., London, Vol. B207, 1980.