How to define variable names for resampling?
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I am using following code to resample the 10m green,red and nir bands to 20m resolution;
% Resample the 10m bands to 20m
if ismember(files(i + j).name, {'*_B03_10m.jp2', '*_B04_10m.jp2', '*_B08_10m.jp2'})
img = imresize(img, 0.5, 'Method', 'bilinear');
end
But this part of code is being not executed.
The names of band files are as follows
T43RGN_20210119T053141_B03_10m
T43RGN_20210119T053141_B04_10m
T43RGN_20210119T053141_B05_20m
T43RGN_20210119T053141_B06_20m
T43RGN_20210119T053141_B07_20m
T43RGN_20210119T053141_B08_10m
I request you to kindly suggest me how to execute above mentioned part of code also.
Deva
采纳的回答
You should:
- replace the ISMEMBER with ENDSWITH
- get rid of those asterisks
For example:
endsWith(files(i+j).name, {'_B03_10m.jp2', '_B04_10m.jp2', '_B08_10m.jp2'})
or even simply:
endsWith(files(i+j).name, '_10m.jp2')
You might also like to use the IgnoreCase option.
NOTE: your code does not work because ISMEMBER matches text literally, so what you incorrectly think are wildcard characters that match anything are in fact literal asterisk characters that match... the asterisk character. The ISMEMBER docunentation does not mention wildcard or special characters anywhere: inventing features which do not exist is unlikely to work.
6 个评论
Devendra
2024-4-20
"Please suggest me how to avoid 20m resolution bands and resample only 10m resolution bands."
You use IF, just like you showed in your original question. Together with ENDSWITH, not with ISMEMBER.
For some reason you seem to be displaying the ENDSWITH output in the command window .... without using it for anything. I did not write that you should get rid of the IF, I wrote that you should replace ISMEMBER with ENDSWITH:
if endsWith(files(i+j).name, '_10m.jp2')
img = imresize(img, 0.5, 'Method', 'bilinear');
end
In any case, rather than resizing images based on the filenames, you should probably resize the images based on the images sizes. That would likely be a much more reliable approach.
Devendra
2024-4-20
编辑：Walter Roberson
2024-4-20
Devendra
2024-4-20
Walter Roberson
2024-4-20
As discussed in https://www.mathworks.com/matlabcentral/answers/2109356-how-to-use-enviwrite-in-matlab enviwrite() expects a hypercube object. A version of enviwrite() that expects a cuboid of data is at https://github.com/akayasse/ENVI-read-and-write-for-MATLAB
Devendra
2024-4-20
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