[1] WILLIAM L,STEWART II. Passive millimeter wave imaging considerations for tactical aircraft[J]. Aerospace and Electronic Systems Magazine,IEEE,2002,17(12):11-15.

[2] ZHANG Guang-feng,ZHANG Zu-yin,GUO Wei. Research on optimal millimeter-wave image[A]. 2003 national conference on Millimeter-wave[C]. Shanghai:The Chinese Institute of Electronics,2003. 992-996. (in Chinese).

[3] RAFAEL Gonzalez,RICHAR Woods. Digital Image Processing Second Edition [M] . Beijing:Publishing House of Electronics Industry,2003. 463-482.

[4] ZHOU Xinming,LAN Sai,XU Yan. Comparison of the Edge Detection Algorithms in Image Processing [J]. Modern Electric Power,2002,17(3):65-69.(in Chinese).

[5] LIU Xun,YOU Zhiming. An image edge detection method based on multi-scale morphology [J]. Opto-Electronic Engineering,2003,30(3):56-58. (in Chinese).

[6] WU Bing,QIN Zhi-yuan. New Approaches for the Automatic Selection of the Optimal Threshold in Image Binarization[J]. Journal of Institute of Surveying and Mapping,2002,18(4):283-286.(in Chinese).