Zhou Q, Robson M. Automated rangeland vegetation cover and density estimation using ground digital images and a spectral-contextual classifier[J]. Remote Sensing, 2001, 22(17): 3457-3470.
[13]
Sun C M, Liu T, Tian T, et al. Remote sensing estimation and application of grassland NPP based on MODIS data in southern China[J].Acta Prataculturae Sinica, 2013, 22(5): 11-17.
[14]
Zhang Y X, Li X B, Zhang Y F. Determining vegetation cover based on field data and multi-scale remotely sended data[J]. Chinese Journal of Plant Ecology, 2007, 31(5): 842-849.
[15]
Bao Q L. Color image segmentation based on HSVspace[J]. Software Guide, 2010, 9(7): 171-172.
[16]
Li C Y, Cao Q X, Guo F. Method for fruits and vegetables classificat ion based on dominant color histogram[J]. Journal of Shanghai Jiaotong University, 2009, 43(12): 1888-1903.
[17]
Zhou Q, Robson M. Automated rangeland vegetation cover and density estimation using ground digital images and a spectral-contextual classifier[J]. Remote Sensing, 2001, 22(17): 3457-3470.参考文献：
Smitha M O, Ustin S L, Adamsa J B, et al. Vegetation in deserts: I. A regional measure of abundance from multispectral images[J]. Remote Sensing of Environment, 1990, 31(1): 1-26.
[23]
Luscier J D, Thompson W L, Wilson J M, et al. Using digital photographs and object-based image analysis to estimate percent ground cover in vegetation plots[J]. Frontiers in Ecology and the Environment, 2006, 4(8): 408-413.
Thalen D C P. Ecology and Utilization of Desert Shrub Rangelands in Iraq[M]. Hague: Kluwer Academic Publishers, 1979.
[26]
White M A, Asner G P, Nemani R R, et al. Measuring fractional cover and leaf area index in arid ecosystems: digital camera, radiation transmittance, and laser altimetry methods[J]. Remote Sensing of Environment, 2000, 74(1): 45-57.
[27]
Thalen D C P. Ecology and Utilization of Desert Shrub Rangelands in Iraq[M]. Hague: Kluwer Academic Publishers, 1979.
[28]
White M A, Asner G P, Nemani R R, et al. Measuring fractional cover and leaf area index in arid ecosystems: digital camera, radiation transmittance, and laser altimetry methods[J]. Remote Sensing of Environment, 2000, 74(1): 45-57.
[29]
Richardson M D, Karcher D E, Purcell L C. Quantifying turfgrass cover using digital image analysis[J]. Crop Science, 2001, 41(6): 1184-1188.
[30]
Chi H J, Zhou G S, Xu Z Z, et al. Measuring coverage of grassland vegetation using remote sensing over short distances[J].Acta Prataculturae Sinica, 2007, 16(2): 105-110.
[31]
Song X F, Dong Y P, Shan L Y, et al. Grassland cover was measured using a digital camera[J]. Journal of Inner Mongolia Prataculture,
[32]
, 2004, 16(4): 1-6.
[33]
Zhang Q P, Zhang S S, Chen L, et al. Identification and analysis of turf coverage with WinCAM software[J]. Pratacultural Science, 2010, 27(7): 13-17.
[34]
Zhang X X, Zhu Q K, Wu G M, et al. Vegetation coverage assessment by digital photos[J]. Journal of Beijing Forestry University , 2008, 80(1): 164-169.
[35]
Jia J H, Hu Y, Liu L Y. Useing digital photography to measure vegetation coverage in Qinghai-Tibet plateau[J]. Journal of Geo-Information Science, 2010, 12(6): 880-884.
[36]
Chen M D, Huang X D, Hou X M, et al. Dynamic monitoring of biomass and vegetation coverage in rodent damaged grassland regions of Qinghai Province, China[J]. Acta Prataculturae Sinica, 2013, 22(4): 247-256.
[37]
Reference：
[38]
Zhang C B, Li J L, Zhang Y, et al. A quantitative analysis method for measuring grassland coverage based on the RGB model[J]. Acta Prataculturae Sinica, 2013, 22(4): 220-226.
[39]
Qin W, Zhu Q K, Zhanng X X, et al. Review of vegetation covering and its measuring and calculating method[J]. Journal of Northwest A&F University(Natural Science Edition), 2006, 34(9): 163-169.
[40]
Gu Z J, Zeng Z Y. Overview of Researches on Vegetation Coverage in Remote Sensing[J]. Research of Soil and Water Conservation , 2005, 12(2): 18-21.
[41]
Zhang W B, Fu S H, Liu B Y. Error assessment of visual estimation plant coverage[J]. Journal of Beijing Normal University(Natural Science), 2001, 37(3): 402-408.
[42]
Smitha M O, Ustin S L, Adamsa J B, et al. Vegetation in deserts: I. A regional measure of abundance from multispectral images[J]. Remote Sensing of Environment, 1990, 31(1): 1-26.
[43]
Luscier J D, Thompson W L, Wilson J M, et al. Using digital photographs and object based image analysis to estimate percent ground cover in vegetation plots[J]. Frontiers in Ecology and the Environment, 2006, 4(8): 408-413.
[44]
Hu J B, Zhang L, Huang W, et al. Quickly determining grassland cover using the digital image[J]. Pratacultural Science, 2011, 28(9): 1661-1665.
