Hi Devendra,
Please check out the below sample code to read, layer stack, and then write Sentinel 2 images as ENVI files.
%Read 6 bands
B02=imread("R10m\tile_id_B02_10m.jp2");
B03=imread("R10m\tile_id_B03_10m.jp2");
B04=imread("R10m\tile_id_B04_10m.jp2");
B08=imread("R10m\tile_id_B08_10m.jp2");
B11=imread("R20m\tile_id_B11_20m.jp2");
B12=imread("R20m\tile_id_B12_20m.jp2");
%resize desired bands
bandSize20m=5490;
B02=imresize(B02,[bandSize20m,bandSize20m]);
B03=imresize(B03,[bandSize20m,bandSize20m]);
B04=imresize(B04,[bandSize20m,bandSize20m]);
B08=imresize(B08,[bandSize20m,bandSize20m]);
%layer stack the bands
cube=zeros(bandSize20m,bandSize20m,6,"uint16");%6 bands
cube(:,:,1)=B02;
cube(:,:,2)=B03;
cube(:,:,3)=B04;
cube(:,:,4)=B08;
cube(:,:,5)=B11;
cube(:,:,6)=B12;
%set wavelength of each band
wavelength=[490 560 665 842 1610 2190];
%create metadata struct
metadata.WavelengthUnits="nm";
%create hypercube object
hcube=hypercube(cube,wavelength,metadata);
%write as ENVI file
enviwrite(hcube,"location\filename","DataType","uint16")
In the above demo code, I have only set one metadata as an example. You can set more metadata fields by adding to the stuct named 'metadata' in above code and all of those will apprear in the .hdr file generated by enviwrite.
You can read more about parameterised hypercube object creation here and also check out enviwrite function here.
Hope this helps. Regards.
