Struct ExtensionStats 

#[non_exhaustive]
pub struct ExtensionStats {

    pub iterations: usize,
    pub h_quality: Option<HomographyQuality<f32>>,
    pub h_residual_median_px: Option<f32>,
    pub h_residual_max_px: Option<f32>,
    pub h_trusted: bool,
    pub attached: usize,
    pub rejected_no_candidate: usize,
    pub rejected_ambiguous: usize,
    pub rejected_label: usize,
    pub rejected_policy: usize,
    pub rejected_edge: usize,
    pub attached_indices: Vec<usize>,
    pub attached_cells: Vec<(i32, i32)>,
}

Diagnostic counters returned by both extension strategies.

attached_indices lets callers identify boundary-extension attachments distinct from BFS-grow labels, e.g., for downstream blacklist scoping or overlay rendering.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

iterations: usize

Number of extension iterations actually run (≤ the configured cap).

h_quality: Option<HomographyQuality<f32>>

None when the H wasn’t fit (too few labels or solver failure).

h_residual_median_px: Option<f32>

None when the H wasn’t fit. Pixel units.

h_residual_max_px: Option<f32>

Maximum reprojection residual on the labelled set, in pixels. None when the H wasn’t fit.

h_trusted: bool

false when the residual gate refused to extrapolate — the function is a no-op and attached == 0.

attached: usize

Number of corners successfully attached across all iterations.

rejected_no_candidate: usize

Candidate cells skipped because no corner sat near the predicted spot.

rejected_ambiguous: usize

Candidate cells skipped because two corners were equally plausible.

rejected_label: usize

Candidate cells skipped because the target (i, j) was already labelled.

rejected_policy: usize

Candidate corners rejected by the caller-supplied SquareAttachPolicy.

rejected_edge: usize

Candidate corners rejected by the induced-edge geometry check.

attached_indices: Vec<usize>

Indices of the corners attached in this pass.

attached_cells: Vec<(i32, i32)>

(i, j) cells that survived to attachment.

Trait Implementations

impl Clone for ExtensionStats

fn clone(&self) -> ExtensionStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtensionStats

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

Formats the value using the given formatter.

impl Default for ExtensionStats

fn default() -> ExtensionStats

Returns the “default value” for a type.