How to batch read image names from a folder with rules

Method 1, if the name is irregular, but the format is uniform, you can read the index (as a structure) of the picture in all formats and jpg in the following way, where the name element is the name of the picture. Then you can follow imread to read.

1. img_dir = dir ('./ data / *. jpg');
   
2. for i = 1:3
   
3. I = imread(['./data/'  img_dir(i).name]);
   
4. end

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Method 2, the names are regular, for example, 0001.jpg 0002.jpg 0003.jpg
can construct names by themselves.

1. for i =1:3
   
2. I = imread(['./data/' num2str(i,'%04d') '.jpg'] );
   
3. end

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