Struct Conformed 

struct Conformed {
    data: Vec<u8>,
    dims: (usize, usize, usize),
    in_affine: [[f32; 4]; 4],
    out_affine: [[f32; 4]; 4],
}

The input conformed to the 256³ 1 mm LIA grid, plus what is needed to map a mask back.

The geometry is computed as niimath computes it — f32 matrices, inverted in f64 and rounded back to f32, applied in f32 in the same order — so that voxels whose sample point falls on a rounding tie (common: a 0.9375 mm grid against a 1 mm one) land where niimath puts them.

Fields

data: Vec<u8>

Conformed u8 intensities, column-major (256, 256, 256).

dims: (usize, usize, usize)

Input dimensions.

in_affine: [[f32; 4]; 4]

Input voxel→world, as f32.

out_affine: [[f32; 4]; 4]

Conformed voxel→world, as f32.

Implementations

impl Conformed

fn new( image: &[f64], dims: (usize, usize, usize), affine: &[f64; 16], ) -> Option<Self>

niimath -conform: scale to u8’s range, reslice to 256³ 1 mm LIA. None if the affine is singular.

fn reslice_back(&self, mask: &[u8]) -> Vec<u8>

niimath -reslice_nn: nearest-neighbour from the conformed grid back onto the input grid (rounding half away from zero; 0 outside the conformed cube).