bise {bise} | R Documentation |
Computes the upper envelope of daily NDVI values over one year.
bise(ndvi)
ndvi |
Double(real), observed NDVI values between 0 and 1 |
to be followed
NDVI values extracted out of very noise satellite observations. These are regarded to be the 'TRUE' observations.
Daniel Doktor, Alberte Bondeau
Viovy et. al (1992). The Best Index Slope Extraction (BISE) - a method for reducing noise in NDVI time-series. International Journal of Remote Sensing, 13, 1585-1590.
## Not run: load("/1991-400") ndvi <- result[,400] ndvi <- ifelse(ndvi < 0 | ndvi >= 1, 0, ndvi) ndvi <- ifelse(is.na(ndvi)==TRUE, 0, ndvi) bise(ndvi) ## End(Not run)