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What those permute numbers mean?
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I have seen by research that in order to permute the image the command is as follows:
im = flip(permute(Img, [3 2 1 4]),1);
Can someone please explain me what those 3,2,1,4 digits mean?
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Adam
le 21 Juin 2018
Modifié(e) : Adam
le 21 Juin 2018
They are the order of permutation of the dimensions, as described in
doc permute
So after the permutation what was the 3rd dimension will now be the 1st, what was the 2nd will stay the 2nd, what was the 1st will now be the 3rd and the 4th will remain as is.
However, that example assumes Img is 4-dimensional, which is odd for an image, unless it is a stack of RGB images in some manner.
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KARSH THARYANI
le 21 Juin 2018
The Img is supposedly an array of dimension a X b X c X d. permute() will change the access order to access the elements. So, if you accessed the Img(a, b, c, d) element in the array Img, now you would use Img(c, b, a, d) to access this element, because of the order = [3, 2, 1, 4]. The array is still the same. See more here
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