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How to downsample the 3D matrix in matlab??

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Rizwan Khan
Rizwan Khan 2022-7-24
评论： Kristoffer Walker 2024-7-6，16:42
Due to computational limitations, I need to downsample the 3D (1500x1500x1700) matrix by a factor of 2. The binning process should merg the 2x2x2 voxels and assign the mean intensity value of the group to the corresponding voxel in the reduced image.

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Jan
Jan 2022-7-24
X = rand(1500, 1500, 1700); % 28.5 GB - does not run in the forum!
Y = reshape(X, 2, 750, 2, 750, 2, 850);
Z = squeeze(sum(Y, [1,3,5])) / 8;
size(Z)
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Rizwan Khan
Rizwan Khan 2022-7-25
Yes, I omitted the last vector before downsampling.
thanks Jan

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