adding data to a cell array without loosing the order
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I have images in a imagedatastore that i want to add to a cell array but i need them to stay in the same order as they are frames from a vid really . how do i do that? i tried this but it does not keep the order . i have 24000 images that i want in stacks of 5. so it needs to have 4800 rows and 5 columns
C{(4800),5} = [];
for i = 1:length(ds.Files)
img = readimage(ds,i);
C{i}=img(i) ;
end
4 Comments
Stephen23
on 27 Jul 2021
The whole point of an imagedatastore is that it is a special class which is a collection of image files that does not load them all into memory. As far as I can tell, your current approach does not utilize the imagedatastore at all.
Note that unless you are working with tiny images, importing all 24000 of them into memory at once is going to require quite a bit of memory: does your computer have sufficient memory to store all images at once and perform whatever operations you want on them?
Most likely you need to re-think your approach (hint: use the imagedatastore instead of a cell array).
Accepted Answer
KSSV
on 27 Jul 2021
Edited: KSSV
on 27 Jul 2021
idx = 1:24000;
id = reshape(idx,5,[])' ;
[m,n] = size(id) ;
C = cell(m,n) ;
for i = 1:m
for j = 1:n
C{i,j} = readimage(ds,id(i,j));
end
end
5 Comments
KSSV
on 27 Jul 2021
The order is maintained, you need not to worry. I suspect there might be memory issues if you read all the images.
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