How to mask pixels of certain ndvi values?

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Devendra
Devendra 2024-4-14
评论： Devendra 2024-4-15
I am using following matlab code to divide the parcels into cropland and non cropland
if mean(parcel_ndvi(idx == 1)) > mean(parcel_ndvi(idx == 2))
cropland = 1;
noncropland = 2;
else
cropland = 2;
noncropland = 1;
end
mask = idx == cropland;
now I want to mask only those pixels within cropland whose ndvi values are greater than 0.4. I request you to please suggest me how to create the said mask. I would appreciate your kind help.
Devendra

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DGM
DGM 2024-4-15
Here's my guess.
% idx is apparently some sort of label array where the labels are unknown
% so this simply figures out which label corresponds to which class
if mean(parcel_ndvi(idx == 1)) > mean(parcel_ndvi(idx == 2))
croplandidx = 1;
noncroplandidx = 2;
else
croplandidx = 2;
noncroplandidx = 1;
end
% a logical mask of cropland
cropmask = idx == croplandidx;
% a logical mask of cropland with NDVI > 0.4
hi_ndvi_cropmask = cropmask & (parcel_ndvi > 0.4);
  1 个评论
Devendra
Devendra 2024-4-15
Thanks a lot for your kind help. I appreciate your kind cooperation and support.
Deva

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