[1] [1] Wu Dan, Yu Yaxin, Xia Junrong, et al. Long-term variation in haze days and related climatic factors in Nanjing[J].Journal of Nanjing Institute of Meteorology, 2016, 39(2):232-242. (in Chinese)

[2] [2] Finsy R, Deriemaeker L, Geladé E, et al. Inversion of static light scattering measurements for particle size distributions[J]. Journal of Colloid and Interface Science, 1992, 153(2):337-354.

[3] [3] Cao Lixia. Research on measurement technology of particle size based on static light scattering[D]. Hangzhou: China Jiliang University, 2015. (in Chinese)

[4] [4] Fan Jiao, Guo Baofeng, He Hongchang. Retrieval of aerosol optical thickness with MODIS data over Hangzhou[J]. Acta Optica Sinica, 2015, 35(1): 9-17. (in Chinese)

[5] [5] Lu Lipeng, Wang Bin, Liu Hui, et al. Haze pollution level detection method based on image gray differential statistics[J]. Computer Engineering, 2016, 42(1): 225-230. (in Chinese)

[6] [6] Steffens C. Measurement of visibility by photographic photometry[J]. Industrial Engineering Chemistry, 1949, 41(11): 2396－2399.

[7] [7] Han Mingmin. High waility detecting technology based on video images[D]. Beiijng: Beijing Jiaotong University, 2016.

          (in Chinese)

[8] [8] Harris C G, Stephens M J. A combined corner and edge detector[C]//Proceedings of the 4th Alvey Vision Conference Manchester, 1988: 147-151.

[9] [9] Xu Xi, Yin Xucheng, Li Yan, et al． Visibility measurement with image understanding[J]. Pattern Recognition and Artificial Intelligence, 2013, 26(6): 543-551. (in Chinese)

[10] [10] Cortes C, Vapnik V. Support-vector networks[J]. Machine Learning, 1995, 20(3): 273-297.