• Source: Normalized Difference Red Edge Index

The normalized difference red edge index (NDRE) is a metric that can be used to analyse whether images obtained from multi-spectral image sensors contain healthy vegetation or not. It is similar to Normalized Difference Vegetation Index (NDVI) but uses the ratio of Near-Infrared and the edge of Red as follows:






NDRE


=



(


NIR


−


RE


)


(


NIR


+


RE


)





{\displaystyle {\mbox{NDRE}}={\frac {({\mbox{NIR}}-{\mbox{RE}})}{({\mbox{NIR}}+{\mbox{RE}})}}}


The red edge is the part of the spectrum centred around 715 nm.




References






External links


Chlorophyll Absorption
Spectral Reflectance Changes Associated with Autumn Senescence of Aesculus hippocastanum L. and Acer platanoides L. Leaves. Spectral Features and Relation to Chlorophyll Estimation
[1]
Barnes, T.R., Clarke, S.E. Richards et. al. 2000. COINCIDENT DETECTION OF CROP WATER STRESS, NITROGEN STATUS AND CANOPY DENSITY USING GROUND-BASED MULTISPECTRAL DATA. Proceedings of the Fifth International Conference on Precision Agriculture

Kata Kunci Pencarian:

• Normalized Difference Red Edge Index
• Normalized difference vegetation index
• Red edge
• NDRE
• Vegetation index
• Machine learning in earth sciences
• Optical transfer function
• Body mass index
• Extreme ultraviolet lithography
• Diffraction