Given a collection of 2D slices which as a whole corresponds to a 3D volume (medical image of an organ), I only take specific slices (i.e. I replace the ones I dont want with zeros) and so, I end up with a 3D matrix of same shape e.g. 64x64x40 and it is "like" if I had an irregular sampling. I now would like to interpolate to have a full 64x64x40 matrix.
I think it looks like a traditionnal upsampling (e.g like if I had these 40-n slices and upsampled with 0s but irregularily. Now I would like to interpolated this irregular upsampling. Any ideas/references? I am having trouble to find.