Feedback based modification of the NDVI to minimize canopy background and atmospheric noise

Liu, HQ; Huete, A

Feedback based modification of the NDVI to minimize canopy background and atmospheric noise

1995

Liu, HQ | Huete, A

The Normalized Difference Vegetation Index (NDVI) equation has a simple, open loop structure (no feedback), which renders it susceptible to large sources of error and uncertainty over variable atmospheric and canopy background conditions. In this study, a systems analysis approach is used to examine noise sources in existing vegetation indices (VI's) and to develop a stable, modified NDVI (MNDVI) equation. The MNDVI, a closed-loop version of the NDVI, was constructed by adding 1) a soil and atmospheric noise feedback loop, and 2) an atmospheric noise compensation forward loop.

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