A Comparative Study of Different Vegetation Indices for Estimating Vegetation Coverage Based on the Dimidiate Pixel Model
XU Shuang1,2, SHEN Run-ping1, YANG Xiao-yue1,2
1. Key Laboratory of Meteorological Disasters, Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2. College of Remote Sensing, Nanjing University of Information Science and Technology, Nanjing 210044, China
Abstract：ASD Field Spec Pro FRTM spectroradiometer was used to measure the spectral response of the vegetable and grass at different vegetation coverage levels. The data were applied to calculate six vegetation indices, i.e., NDVI (normalized difference vegetation index), DVI (difference vegetation index), RVI (ratio vegetation index), MVI (modified vegetation index), MSAVI (modified soil adjusted vegetation index) and GEMI (global environment monitoring index). Then the best combination of spectral bands was analyzed. Furthermore, the performance of different vegetation indices was investigated when they were used to estimate the vegetation coverage by using the dimidiate pixel model. The results show that, for the green vegetable, the best combinations of bands in the spectral region from 620 to 740 nm and from 780 to 900 nm have the best correlation with the vegetation index, whereas for the grass, the best combinations of bands are from 620 to 750 nm and from 760 to 900 nm, with the correlation coefficients of the two cases being all larger than 0.8. The bands of Landsat7 and HJ-1A CCD1 simulated according to the spectral response function were employed to calculate the six vegetation indices. The average overall accuracy for estimating the vegetation fraction by DVI and MSAVI is 83.7% and 79.5% respectively, indicating that they are superior to the other four vegetation indices as the input of vegetation index for the dimidiate pixel model.
徐爽, 沈润平, 杨晓月. 利用不同植被指数估算植被覆盖度的比较研究[J]. 国土资源遥感, 2012, 24(4): 95-100.
XU Shuang, SHEN Run-ping, YANG Xiao-yue. A Comparative Study of Different Vegetation Indices for Estimating Vegetation Coverage Based on the Dimidiate Pixel Model. REMOTE SENSING FOR LAND & RESOURCES, 2012, 24(4): 95-100.
[1] Qi J,Cabot F,Moran M S,et al.Biophysical Parameter Estimations Using Multidirectional Spectral Measurements[J].Remote Sensing Of Environment,1995,54(1):71-83.[2] Gitelson A A,Kaufman Y J,Stark R,et al.Novel Algorithms for Remote Estimation of Vegetation Fraction[J].Remote Sensing of Environment,2002,80(1):76-87.[3] 党青,杨武年.近20年成都市植被覆盖度动态变化检测及原因分析[J].国土资源遥感,2011(4):121-125.Dang Q,Yang W N.Dynamic Supervision and Reason Analysis of Vegetation Coverage Changes of Chengdu in the Past 20 Years[J].Remote Sensing for Land and Resource,2011(4):121-125(in Chinese with English Abstract).[4] Wittich K P,Hansing O.Area-averaged Vegetative Cover Fraction Estimated from Satellite Data[J].International Journal of Biometerology,1995,38(4):209-215.[5] 刁兆岩,徐立荣,冯朝阳,等.呼伦贝尔沙化草原植被覆盖度估算光谱模型[J].干旱区资源与环境,2012,26(2):139-144.Diao Z Y,Xu L R,Feng C Y,et al.The Ground Spectral Model for Estimating Vegetation Coverage on Desertified Grassland,Hulunbeier,Inner Mongolia,China[J].Journal of Arid Land Resources and Environment,2012,26(2):139-144(in Chinese with English Abstract).[6] 李登科,范建忠,王娟.陕西省植被覆盖度变化特征及其成因[J].应用生态学报,2010,21(11):2896-2903.Li D K,Fan J Z,Wang J.Change Characteristics and Their Causes of Fractional Vegetation Coverage (FVC) in Shaanxi Province[J].Chinese Journal of Applied Ecology,2010,21(11):2896-2903(in Chinese with English Abstract).[7] 刘瑞,王世新,周艺,等.基于遥感技术的县级区域环境质量评价模型研究[J].中国环境科学,2012,32(1):181-186.Liu R,Wang S X,Zhou Y,et al.Ecological Environment Condition Evaluation Mode of County Region Based on Remote Sensing Techniques[J].China Environmental Science,2012,32(1):181-186(in Chinese with English Abstract).[8] 廖春华,张显峰,孙权,等.基于HJ-1高光谱数据的植被覆盖度估测方法研究[J].遥感信息,2011(5):65-70.Liao C H,Zhang X F,Sun Q,et al.Fractional Vegetation Cover Estimation Using HJ-1 Spaceborne Hyperspectral Data[J].Remote Sensing Information,2011(5):65-70(in Chinese with English Abstract).[9] Jiang Z Y,Huete A R,Chen J,et al.Analysis of NDVI and Scaled Difference Vegetation Index Retrievals of Vegetation Fraction[J].Remote Sensing of Environment,2006,101(3):366-378.[10] Small C.Estimation of Urban Vegetation Abundance by Spectral Mixture Analysis[J].International Journal of Remote Sensing,2001,22(7):1305-1334.[11] Huang Z,Turner B J,Dury S J,et al.Estimating Foliage Nitrogen Concentration from HyMAP Data Using Continuum Removal Analysis[J].Remote Sensing of Environment,2004,93(1/2):18-29.[12] Thenkabail P S,Enclona E A,Ashton M S,et al.Accuracy Assessments of Hyperspectral Waveband Performance for Vegetation Analysis Applications[J].Remote Sensing of Environment,2004,91(3/4):354-376.[13] Rouse J W,Haas R H,Schell J A,et al.Monitoring Vegetation Systems in the Ggreat Plains with ERTS[C] //Third Earth Resources Technology Satellite-1 Symposium.Washington.DC.NASA,1973,1:309-317.[14] Jordan C F.Derivation of Leaf-area Index from Quality of Light on the Forest Floor[J].Ecology,1969,50(4):663-666.[15] Pearson R L,Miller D L.Remote Mapping of Standing Crop Biomass for Estimation of the Productivity of the Shortgrass Prairie[C] //Proceedings of the English International Symuposium on Remote Sensing of Environment,1972,2:1375-1381.[16] McDaniel K C,Haas R H.Assessing Mesquite-grass Vegetation Condition from Landsat[J].Photogrammetric Engineering and Remote Sensing,1982,48(3):441-450.[17] Qi J,Chenbouni A,Huete A R,et al.A Modified Soil Adjusted Vegetation Index[J].Remote Sensing of Environment,1994,48(2):119-126.[18] Pinty B,Verstraete M M.GEMI:A Non-linear Index to Monitor Global Vegetation from Satellites[J].Vegetation,1992,101(1):15-20.[19] [JP4] Zribi M,Le Hegarat-Mascle S,Taconet O,et al.Derivation of Wild Vegetation Cover Density in Semi-arid Regions:ERS2/SAR Evaluation[J].International Journal of Remote Sensing,2003,24(6):1335-1352.[20] 李丽,童立强,李小慧.基于植被覆盖度的石漠化遥感信息提取方法研究[J].国土资源遥感,2010(2):59-62.Li L,Tong L Q,Li X H.The Remote Sensing Information Extraction Method Based on Vegetation Coverage[J].Remote Sensing for Land and Resources,2010(2):59-62(in Chinese with English Abstract).
2012, Vol. 24 
