Struct PersistenceImage 

pub struct PersistenceImage {
    pub pixels: Vec<Vec<f64>>,
    pub n_rows: usize,
    pub n_cols: usize,
    pub birth_min: f64,
    pub birth_max: f64,
    pub pers_max: f64,
    pub sigma: f64,
}

Persistence image: a pixelated representation of a persistence diagram.

Points are represented in birth-persistence coordinates, then convolved with a Gaussian kernel and discretized onto a pixel grid.

Fields

pixels: Vec<Vec<f64>>

Pixel grid (row-major, rows = persistence axis, cols = birth axis).

n_rows: usize

Number of grid rows (persistence resolution).

n_cols: usize

Number of grid cols (birth resolution).

birth_min: f64

Minimum birth value.

birth_max: f64

Maximum birth value.

pers_max: f64

Maximum persistence value.

sigma: f64

Gaussian bandwidth (sigma).

Implementations

impl PersistenceImage

pub fn from_diagram( diagram: &PersistenceDiagram, n_rows: usize, n_cols: usize, sigma: f64, ) -> Self

Build a persistence image from a persistence diagram.

n_rows and n_cols control resolution. sigma is the Gaussian kernel bandwidth.

pub fn to_vector(&self) -> Vec<f64>

Flatten the pixel grid to a 1D feature vector (row-major).

pub fn max_value(&self) -> f64

Return the maximum pixel value.

Trait Implementations

impl Clone for PersistenceImage

fn clone(&self) -> PersistenceImage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PersistenceImage

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

Formats the value using the given formatter.