How can fill holes in 3D binary matrix?

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Erfaneh 2014-8-15

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编辑： Matt J 2014-8-16

I have a huge 3D binary matrix. To process it, I need to fill some holes but imfill(BW,'holes') does not work on 3D binary matrix and I just use it for one element in the matrix. I want to fill holes in all elements of the matrix not element by element. Can some one help me?

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Image Analyst 2014-8-15

What do you mean by "I just use it for one element"? How are you using it? If you pass in the whole array, it will fill the whole array - all holes that are there, even for a 3D or higher dimension array.

Image Analyst 2014-8-16

Thanks for clearing up your non-standard terminology. What you call an "element" is what everyone else in the world calls a "slice", or sometimes "plane". An element is just one voxel - one single value of the 3D array.

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Matt J 2014-8-15

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编辑：Matt J 2014-8-15

在 MATLAB Online 中打开

What version of MATLAB are you using? IN R2013b, using imfill(BW,'holes') for 3D BW works fine for me, e.g.,

>> BW=ones(3,3,3); BW(2,2,2)=0; BW=imfill(BW,'holes')
BW(:,:,1) =
       1     1     1
       1     1     1
       1     1     1
BW(:,:,2) =
       1     1     1
       1     1     1
       1     1     1
BW(:,:,3) =
       1     1     1
       1     1     1
       1     1     1

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Image Analyst 2014-8-16

OK, just as long as you know that imclose is not guaranteed to fill all holes, and it changes the shape of the region by smoothing it out. It can do some hole filling but it's not the same as imfill.