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About: Normalized Difference Red Edge Index     Goto   Sponge   NotDistinct   Permalink

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