通过在Matlab中加载多个图像来创建csv文件

Question

I am working on a machine learning problem of classifying different types of leaves using the flavia dataset. I have a dataset folder that has 32 sub folders each containing some images of the respective class. The images are grayscale of dimension 4096x1. How can i load all these images from all the subfolders at once and then create a csv file from the stored pixel values ?

Answer 1

Create a cell array with all the filenames, eg

C{1} = '/path/to/file1.png';
C{2} = '/path/to/file2.png';

etc. (there are several ways to do this automatically, but given I have no information on your file structure and there aren't that many files, let's skip this step. )

Then have a for loop

for n = 1 : 32
  I = imread(C{n});
  csvwrite('my_csv_file.csv', I(:).', '-append');
end

PS. The (:).' syntax ensures each image becomes a row.