how can make a dataset of images?

Question

jack nn 2015-6-14

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https://ww2.mathworks.cn/matlabcentral/answers/223784-how-can-make-a-dataset-of-images

评论： Walter Roberson 2017-2-18

I provided a code that gets an initial image as input and gives me 4 images as result. I should run this code as loop that user enters an initial images. in this loop every time I should save all the results because I want to make a dataset of these images and then do feature extraction. how can I do this? Can I use structure for this? I think that we can imagine every image as a matrix but I don't how we can do this .I think I should have a dataset of images like this:

but I dont know how can make this.do you think this idea is rational?or I should change my approach.

I appreciate your helps and supports in advanced.

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Answer 1

Walter Roberson 2015-6-14

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在 MATLAB Online 中打开

A struct is fine.

datastruct = struct('IMG1', [], 'IMG2', [], 'IMG3', [], 'IMG4', []);
while true
  [filename, pathstr] = uigetfile('Select an image');
  if ~ischar(filename)   %user canceled
    break;
  end
  fullname = fullfile(pathstr, filename);  %it might not be in current directory
  ... process file named by fullname
  datastruct(end+1).IMG1 = image1;
  datastruct(end).IMG2 = image2;
  datastruct(end).IMG3 = image3;
  datastruct(end).IMG4 = image4;
end

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jack nn 2015-6-15

thanks dear Walter Roberson .

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Answer 2

Image Analyst 2015-6-15

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Why can't you do feature extraction immediately after you create them, and not worry about saving these intermediate images? Why do you have to save them all? If, for some reason you do, then I'd just save them in .mat files until you need them at some later time.