Skip to main content

Table 1 A selection of vegetation indices

From: Hyperspectral image analysis techniques for the detection and classification of the early onset of plant disease and stress

VI Formula References Information
Normalised difference vegetation index (NDVI) (RNIR − RRED)/(RNIR + RRED)
RRED ~ 680, RNIR ~ 800
[50] Range: − 1 to 1
Common range: 0.2–0.8
Broadband
Red edge NDVI (R750 − R705)/(R750 + R705) [50] Range: − 1 to 1
Typical healthy range: 0.2 to 0.9
Narrowband (hyperspectral data)
Simple ratio index (SRI) RNIR/RRED
RRED ~ 680, RNIR ~ 800
[20] Range: 0 to > 30
Typical healthy range: ~ 2–8
Broadband
Photochemical reflectance index (PRI) (R531 − R570)/(R531 + R570) [50]
[51]
Range: − 1 to 1
Typical healthy range: − 0.2 to 0.2
Vegetation health prior to senescence
Plant senescence reflectance index (PSRI) (Red–Green)/NIR [50] Range: − 1 to 1
Typical healthy range: − 0.1 to 0.2
>PSRI ~ canopy stress, onset of senescence, fruit ripening
Normalised phaeophytinization index (NPQI) (R415 − R435)/(R415 + R435) [52] Chlorophyll degradation
0.56–1.41
Unacidified and acidified solutions [53]
Structure Independent Pigment Index (SIPI) (R800 − R445)/(R800 + R680) [50]
[51]
[54]
Range: 0–2
Typical healthy range: 0.8–1.8
Good with canopy variety
Leaf rust disease severity index (LRDSI) 6.9 × (R605/R455) − 1.2 [23] Accuracy of 89% in study may vary with other data.