Open Modis images in a loop and apply NDVI on them

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Yassine Manyari
Yassine Manyari on 26 Oct 2018
Edited: Kevin Chng on 27 Oct 2018
Hello,
I have a 12 modis images that I want to open in a loop. and I just don't know how, I want only to work on their first and second bands ( as it is mentioned in the picture )
Also I tried to apply NDVI and I dont know why It doesn't work ( picture 2)

Answers (1)

Kevin Chng
Kevin Chng on 27 Oct 2018
Edited: Kevin Chng on 27 Oct 2018
Hi
first of all, load your information into array first, which allow you to use indexing to get their information later.
folder='E:\Matlab';
filetype='*.hdf';
f=fullfile(folder,filetype);
d=dir(f);
for i=1:numel(d);
Red(i) = hdfread(fullfile(folder,d(i).name), 'MORIS_Grid_500m_2D','Fields','sur_ref1_b01_1');
NIR(i) = hdfread(fullfile(folder,d(i).name), 'MORIS_Grid_500m_2D','Fields','sur_ref1_b02_1');
end
After the code above, now we use indexing to get the information from the array for our calculation.
for i=1:1:numel(d)
NDVI(i) = double(NIR(i)-Red(i)) ./ (double (NIR(i) + Red(i)));
end
Kindly accept my answe if they are working for you.

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