Enum PosteriorPrecision 

pub enum PosteriorPrecision {
    F32,
    F16,
}

Storage for the posteriors, n_labels values per voxel of the network’s grid.

Variants

F32

Single precision, as the SynthSeg CLI keeps them.

F16

Half precision (IEEE binary16, about 3 significant digits): half the memory. The arithmetic stays in single precision; only the stored values are rounded. With FullVolume and flip averaging, the first pass’s posteriors are rounded to half precision before the flipped pass runs, so the two passes are never held in full precision at once.

No accuracy cost on three 1 mm scans: with windows, Dice and soft volumes match single precision to 4 digits; on the whole volume the lowest label’s Dice against single precision is 0.9993. It saved 0.4 GB natively on a 192×256×128 grid (0.8 GB on 192×256×256) and 0.39 GB of WASM heap with 96³ windows (2418 → 2025 MB). Conversions go through slices (see Posterior::load), so it runs as fast as single precision. 16-bit fixed point on [0, 1] was tried as an alternative and rejected: it rounds the many tiny posteriors to zero, shifting small labels’ soft volumes by up to 0.4 %.

Trait Implementations

impl Clone for PosteriorPrecision

fn clone(&self) -> PosteriorPrecision

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for PosteriorPrecision

impl Debug for PosteriorPrecision

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for PosteriorPrecision

fn default() -> PosteriorPrecision

Returns the “default value” for a type.

impl Eq for PosteriorPrecision

impl PartialEq for PosteriorPrecision

fn eq(&self, other: &PosteriorPrecision) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for PosteriorPrecision

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for PosteriorPrecision