本人剛做遙感和地信這個方向，然后想做一下時序的土地分類，初步打算是用MOD13Q1的NDVI值做，然后用非監督分類，但是再處理MOD13Q1影像的時候遇到了個問題，就是再曬出了一些質量不好的像元和冰雪云影像的像元之后，就會空出很多空值，我查了一下文獻，別人是用線性插值法將整個影像空缺的值給插上值，但是這一步要怎么實作啊？我查了好久文獻和百度，解決不了，所以再此求助各位大佬！！！謝謝了......
具體的文獻內容是：
The NDVI products utilized here were initially preprocessed bystacking 23 annual images into a time-series. However, as these raw
NDVI time-series are themselves disturbed by background noises due to cloud contamination and atmospheric variability, we removed those flagged as either clouds, water, or ice based on MODIS quality assurance information and then applied a linear interpolation method to complete missing data. We then employed a Savitzky-Golay filter (Savitzky &Golay, 1964) to reconstruct a smoothed NDVI time series and utilized the TIMESAT tool (J¨onsson & Eklundh, 2004) to compute a set of 11 annual vegetation phenology features.
不知道是不是我理解錯誤.....如果有認知偏差請大家指正。
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