智能手机原位牧草生物量估算
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陶海玉,张爱武,庞海洋,康孝岩
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Smart-Phone Application in Situ Grassland Biomass Estimation
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HaiYu TAO,AiWu ZHANG,HaiYang PANG,XiaoYan KANG
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表1 植被指数计算公式
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Table 1 Formula of vegetation index in this study
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植被指数
Vegetation index | 计算公式
Formula | 参考文献
Reference | | R | r波段的DN值 | — | | G | g波段的DN值 | — | | B | b波段的DN值 | — | | r | R/(R+G+B) | [20] | | g | G/(R+G+B) | [20] | | b | B/(R+G+B) | [20] | | ExG | 2×g - b - r | [20] | | GBRI | g/b | [21] | | NPCI | (r - b) / (r + b) | [22] | | NGBVI | (g - b) / (g +b) | [23] | | VEGI | g/ ((r0.67) ×b0.33) | [24] | | RGBVI | (g2 - (b× r)) / (g2 + (b ×r)) | [25] | | RGRI | r / g | [26] | | RGMPI | r × g | [26] | | RBRI | r / b | — | | RBMPI | r × b | — | | RBMI | r - b | — | | RGMI | r - g | [20] | | RGPI | r + g | [27] | | RBPI | r + b | — | | GBPI | g + b | [27] | | GBMI | g - b | [20] | | VDVI | (2×g - r - b) / (2×g+r+b) | [28] | | VARI | (g - r / (g+r - b) | [29] |
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