I want to resize the images of whole database and then replace it with the same images. The problem is how to create or access the database for images.

Question

Ahmer Shahid 2018-11-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/429333-i-want-to-resize-the-images-of-whole-database-and-then-replace-it-with-the-same-images-the-problem

评论： Ahmer Shahid 2019-3-13

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

Here is the code I tried for resizing and replacing ...

Kindly help me thanks.

           Database = imageSet('Palm','recursive');
            for i=1:size(training,2)
                for j = 1:training(i).Count
                 image=read(Database(i),j);
                 image=imresize(image,0.568);
                 Database((i),j)=image;      %for replacing the same image
                end
            end

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KSSV 2018-11-12

YOu have to save the image in a folder of your choice, using imwrite. And then in that folder use imageSet.

Ahmer Shahid 2018-11-13

how can I store all images in new dataset like old dataset folder by folder.

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Answer 1

Walter Roberson 2018-11-12

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/429333-i-want-to-resize-the-images-of-whole-database-and-then-replace-it-with-the-same-images-the-problem#answer_346443

在 MATLAB Online 中打开

Database = imageSet('Palm','recursive');
for i=1:size(training,2)
  Filenames = Database(i).Locations; 
  for j = 1:training(i).Count
    image=read(Database(i),j);
    image=imresize(image,0.568);
    imwrite(image, Filenames{j}) ;
  end
end

This code is not recommended. Every time you run it, it will shrink the files by the same factor. If there is a problem part way through such as a file permissions problem then you would need to move the files that had already been processed to a different directory or else they would get shrunken again.

It would be safer if you specified an output size instead of a scaling factor: then it would not matter how many times you ran the code on the same file.