[1] [1] Pfeifer N, Hofle B, Briese C, et al.. Analysis of the backscattered energy in terrestrial laser scanning data[J]. Int Arch Photogramm Remote Sens Spat Inf Sci, 2008, 37: 1045-1052.

[2] [2] Hofle B, Pfeifer N. Correction of laser scanning intensity data: Data and model-driven approaches[J]. ISPRS Journal of Photogrammetry and Remote Sensing. 2007, 62(6): 415-433.

[3] [3] Pfeifer N, Dorninger P, Haring A, et al.. Investigating terrestrial laser scanning intensity data: quality and functional relations[C]. Proceedings of the VIII Conference on Optical 3D Measurement Technology, 2007: 328-337.

[4] [4] Oh D. Radiometric correction of mobile laser scanning intensity data[J]. International Institute for Geo-information Science and Earth Observation, Enchede Netherlands Master of Science thesis in Geo-information Science and Earth Observation, 2010.

[5] [5] Yan W Y, Shaker A, Habib A, et al.. Improving classification accuracy of airborne LiDAR intensity data by geometric calibration and radiometric correction[J]. ISPRS Journal of Photogrammetry and Remote Sensing, 2012, 67: 35-44.

[6] [6] Coren F, Sterzai P. Radiometric correction in laser scanning[J]. International Journal of Remote Sensing, 2006, 27(15): 3097-3104.

[7] [7] Ding Q, Chen W, King B, et al.. Combination of overlap-driven adjustment and Phong model for LiDAR intensity correction[J]. ISPRS Journal of Photogrammetry and Remote Sensing, 2013, 75: 40-47.

[8] [8] Jutzi B, Gross H. Normalization of LiDAR intensity data based on range and surface incidence angle[J]. Int Arch Phogogramm Remote Sens Spat Inf Sci, 2009, 38: 213-218.

[9] [9] Errington A F C, Daku B L F, Prugger A F. A model based approach to intensity normalization for terrestrial laser scanners[C]. SPIE, 2011: 828605.

[10] [10] Cheng X J, Tan K, Lou Q Y. Relations of the laser intensity value, the laser ranging value and the laser incident angle[J]. Applied Mechanics and Materials, 2013, 239: 198-201.

[11] [11] Soudarissanane S, Lindenbergh R, Menenti M, et al.. Scanning geometry: Influencing factor on the quality of terrestrial laser scanning points[J]. ISPRS Journal of Photogrammetry and Remote Sensing, 2011, 66(4): 389-399.

[12] [12] Soudarissanane S, Van Ree J, Bucksch A, et al.. Error budget of terrestrial laser scanning: Influence of the incidence angle on the scan quality[J]. Proc in the 3D-NordOst, 2007: 1-8.

[13] [13] Kaasalainen S, Jaakkola A, Kaasalainen M, et al.. Analysis of incidence angle and distance effects on terrestrial laser scanner intensity: Search for correction methods[J]. Remote Sensing, 2011, 3(10): 2207-2221.

[14] [14] Kukko A, Kaasalainen S, Litkey P. Effect of incidence angle on laser scanner intensity and surface data[J]. Appl Opt, 2008, 47(7): 986-992.

[15] [15] Tan Kai, Cheng Xiaojun. Study on the accuracy of point cloud clssification based on the normalized laser intensity[J]. Journal of Tongji University(Natural Science), 2014, 42(1): 131-135.

[16] [16] Liu Jingnan, Zhang Xiaohong. Classification of laser scanning altimetry data using laser intensity[J]. Geomatics and Information Science of Wuhan University, 2005, 30(3): 189-193.

[17] [17] Huang Lei, Lu Xiushan, Liang Yong. Building facade extraction and classification using laser scanning intensity[J]. Geomatics and Information Science of Wuhan University, 2009, 34(2): 195-198.

[18] [18] Jelalian A V. Laser Radar Systems[M]. Boston: Artech House, 1992.

[19] [19] Andrews L. A template for the nearest neighbor problem[J]. C/C++ Users Journal, 2001, 19(11): 40-49.

[20] [20] Arya S, Mount D M, Netanyahu N S, et al.. An optimal algorithm for approximate nearest neighbor searching in fixed dimensions[J]. JACM, 1998, 45(6): 891-923.