[1] [1] WANG K C P. Designs and implementations of automated systems for pavement surface distress survey［J］. Journal of Infrastructure Systems, 2000,6(1):24-32.

[2] [2] LI L, CHAN P, LYTTON R L. Images detection of thin cracks on noisy pavement［J］. Transportation Research Record, 1991,1311:131-135.

[3] [3] JIANG B, LIU SH R. Development of research on pavement distress automatic inspection based on image identify［J］. Northeastern Highway, 2002,25(3):19-21. (in Chinese)

[4] [4] CHOU J C, O’NEIL W A. Pavement distress evaluation using fuzzying logic and moment invariants［R］. Transportation Research Record, 1505, Transportation Research Board, Washington D C:144-148.

[5] [5] WANG R B, WANG CH, CHU X M. Developments of research on road pavement surface distress image recognition［J］. Journal of Jilin University(Engineering and Technology Edition), 2002,32(4):91-96. (in Chinese)

[6] [6] PAL S K, KING R A. Image enhancement using fuzzy sets［J］. Electronics Letters, 1980,16(9):376-378.

[7] [7] CHENG H D, CHEN J R, GLAZIER C, et al. Novel approach to pavement distress detection based on fuzzy set theory［J］. Journal of Computing in Civil Engineering, 1999,13(4):270-280. (in Chinese)

[8] [8] LI SH, ZHANG B, SUN H. Restoration of aerial multiple blurred images［J］. Opt. Precision Eng., 2009,17(5):1161-1170.

[9] [9] ZHANG K H, YANG D. Segmentation for extended target in complex backgrounds based on clustering and fractal［J］. Opt. Precision Eng., 2009,17(７):1665-1671.(in Chinese)

[10] [10] CHEN P, PAN J X, LIU B. Computed tomography image edge degradation model and its application to image size measurement［J］. Opt. Precision Eng., 2009,17(9):2269-2275.(in Chinese)

[11] [11] TANG L, ZHAO CH X, WANG H N, et al.. An adaptive fuzzy enhancement algorithm for road surface images［J］. Acta Photonica Sinica, 2007,36(10):1943-1948. (in Chinese)

[12] [12] LE N, LIANG X J, WENG SH X. The algorithm of image transition region and its improvement［J］. Journal of Infared and Millimeter Waves, 2001,20(3):211-214.(in Chinese)

[13] [13] SHI F ZH. CAGD & NURBS［M］. Beijing: Higher Education Press, 2001.(in Chinese)