stack up 3D images into a 4D matrix

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SaHaR
SaHaR 2020-7-3
评论： SaHaR 2020-7-4
Hello,
I have multiple 3D images and I should stack up these images into a 4D matrix and use it as an input for another code for feature extraction. I have tested this method : cat(4,im1,im2,im3) but it doesn't work well as input. How can I convert these images into 4D matrix ?
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Image Analyst
Image Analyst 2020-7-3
Looks like it should work as long as vol1, vol2, vol3, and ROI are all 3-D arrays whose lengths match in every dimension.
Note that arrays are not indexed (x,y,z) they are indexed (rows, columns, slices) so the convention is that y, which is rows, comes first, not x as you have it.
(rows, columns, slices) is (y, x, z).
So if you're getting an error, or the images look transposed, check that the order of your dimensions is correct.

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