I have 3D patients volumes saved in a matlab variable.
I need to extract random shift intensity difference (RSID) feature, this feature compares the intensity of the current voxel x and another
voxel x + u with random offset u, ` f(x, u) = I(x + u) − I(x)`, where u is a random offset vector.
My question is
- How many neighbors of a specific voxel needs to be considered to calculate RSID?
- How to find them with matlab code?
Your help is appreciated