How to resize a 3D matrix?

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Sandhiya Prakash
Sandhiya Prakash 2017-3-14
评论： SojM 2020-7-17
Hi, I want to reduce the size of a 3D image by averaging the values in 3D. For example if the image is 160*216*176. I wrote the code below to process the image to average the values in every 4*4*4 cube thereby creating a new matrix that is 40*54*44 in size.my code is below
X(1:40)=4;
Y(1:54)=4;
Z(1:44)=4;
A=mat2cell(imagestack_1,[X],[Y],[Z]);
average=cellfun(@mean2,A);
But this shows an error
Error using mat2cell (line 97)
Input arguments, D1 through D3, must sum to each dimension of the input matrix size, [160 216 176].'
Anyone who knows Please guide me!!
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Sandhiya Prakash
Sandhiya Prakash 2017-3-14
I am using MatlabR2016a.
Sandhiya Prakash
Sandhiya Prakash 2017-3-14
I think i must give variable in which 3D image is stored instead of imagestack_1. Kindly guide me.I am new to matlab.

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Walter Roberson
Walter Roberson 2017-3-14
You probably had previous values in your X, Y, or Z, making them longer than what would be created with just the above code.
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Walter Roberson
Walter Roberson 2017-3-14
The boundary points do not have 27 neighbors. You should either calculate only on the interior, or you should define what you want the boundary calculation to be.
SojM
SojM 2020-7-17
After the resize of the matrix, how to save new 3D matrix as stack of 2D images?

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