Converting large stack of 2D images into 3D image: how to improve performance?

Question

Rose Lakatos 2019-11-1

1
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评论： Rose Lakatos 2019-11-5

I am working on a large stack of image data from micro CT and im looking to improve the performance of my code. I have around 600-900 500x500px images that im converting into a 3D stack using a for loop

[file,path]=uigetfile(*.tif,'multiselect','on')
[size_x,size_y]=size(file);
for i=1:size_x
    images_2D{i} = imread(file{i});
    image_stack = cat(3,image_stack,images_2D{i});
end

I'm finding that sometimes it can be bit slow when using the desirable amount of images ~700, but works fine with 20-100 images. Could this process be changed so it can run in parallel as I dont think it can at the moment and keep the images in order.

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Answer 1

Subhadeep Koley 2019-11-4

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在 MATLAB Online 中打开

Hi, instead of for loop you can use parfor loop for better performance. Refer to the code below.

[file,path]=uigetfile('*.*','multiselect','on');
[size_x,size_y]=size(file);
image_stack = [];
parfor i=1:size_y
    tempImage = imread(file{i});
    image_stack(:,:,i) = tempImage;
end