I need to smooth a collection of annual NDVI time-series data for a fairly
large image. Right now I am using an interruptive method that compares the
difference between each point and the mean of its two neighbors. This process
repeats until a threshold is reached. It works well, but it takes a long time.
When I process the image without smoothing the data it takes about 2 hours
with the smoothing it looks like it will take up to 7 days.
The method needs to elevate troughs in the data but retain the peaks I assume
that any troughs are really cloud contamination and that the peaks are accurate
NDVI values. Does anyone know of such a smoother that isn't so time consuming?
Jonathan B. Thayn, Ph.D.
Illinois State University
Department of Geography - Geology
200A Felmley Hall
Normal, Illinois 61790-4400
(309) 438-8112
jth...@ilstu.edu
my.ilstu.edu/~jthayn
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