Struct DetectorConfig 

#[non_exhaustive]
pub struct DetectorConfig {
    pub strategy: DetectionStrategy,
    pub threshold: f32,
    pub detection: DetectionParams,
    pub multiscale: MultiscaleConfig,
    pub upscale: UpscaleConfig,
    pub orientation_method: Option<OrientationMethod>,
    pub merge_radius: f32,
}

High-level detection configuration.

Build one with DetectorConfig::chess, DetectorConfig::chess_multiscale, DetectorConfig::radon, or DetectorConfig::radon_multiscale and tweak only the fields you need. The detector translates this into the low-level ChessParams / RadonDetectorParams consumed by chess-corners-core at the detection boundary.

Common knobs

These fields are the primary surface for most callers:

• strategy — choose ChESS or Radon and configure its parameters.
• threshold — control how many corners are returned: lower → more candidates, higher → fewer and stronger. ChESS reads it as an absolute response floor; Radon as a fraction of the per-frame maximum.
• multiscale — enable coarse-to-fine pyramid detection (Pyramid) or keep it off (SingleScale).
• upscale — pre-pipeline integer bilinear upscaling for low-resolution inputs where corners have fewer than 5 px of ring support. Disabled by default.
• orientation_method — how corner axis orientations are estimated when building descriptors.

Advanced tuning

• detection — shared NMS / clustering thresholds applied by both strategies. See DetectionParams.
• merge_radius — duplicate-suppression radius across pyramid levels. See the field docs below.

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.

strategy: DetectionStrategy

Detector dispatch: ChESS or Radon, each carrying its own tuning.

threshold: f32

Detector acceptance threshold.

ChESS reads it as an absolute floor on the raw response R = SR − DR − 16·MR: a candidate is kept when R exceeds it. Useful floors run roughly 30..=300 depending on image contrast; the chess preset defaults to 30, which suppresses texture noise while keeping well-formed corners. Radon reads it as a fraction in [0.0, 1.0] of the per-frame maximum response, because Radon’s (max − min)² score scales with image size and has no portable absolute scale.

detection: DetectionParams

Shared non-maximum-suppression and peak-clustering thresholds. Honoured by both strategies. See DetectionParams.

multiscale: MultiscaleConfig

Coarse-to-fine multiscale configuration. SingleScale skips the pyramid entirely. Honoured by both strategies.

upscale: UpscaleConfig

Pre-pipeline integer upscaling. Disabled skips the stage.

orientation_method: Option<OrientationMethod>

Orientation-fit method used when building corner descriptors, or None to skip the per-corner fit entirely. When None, every descriptor carries axes: None; positions and responses are unaffected. Skipping orientation is the cheaper path for consumers that derive board geometry themselves.

merge_radius: f32

Advanced tuning. Merge radius in base-image pixels for cross-level and cross-seed duplicate suppression. After seeds detected at coarser pyramid levels are refined into the base image, any two refined positions within this radius are merged into a single output corner. Default is 3.0 px. Increase if you see duplicate detections near the same physical corner; decrease if distinct corners closer than 2·merge_radius pixels are being merged.

Implementations

impl DetectorConfig

pub fn chess() -> Self

Single-scale ChESS preset.

pub fn chess_multiscale() -> Self

Three-level coarse-to-fine ChESS preset.

pub fn radon() -> Self

Whole-image Radon detector preset. Single-scale; use Self::radon_multiscale for coarse-to-fine Radon detection on larger frames.

pub fn radon_multiscale() -> Self

Coarse-to-fine Radon preset. Measure against Self::radon on your target frame sizes; this preset trades more configuration machinery for less full-resolution detector work on large frames.

pub fn with_chess<F: FnOnce(&mut ChessConfig)>(self, f: F) -> Self

Set the active strategy to ChESS and apply f to the nested config. If the current strategy is already ChESS, mutate it in place. Otherwise, replace the strategy with ChessConfig::default and apply f.

Top-level fields (threshold, multiscale, upscale, orientation_method, merge_radius) are untouched. When switching strategies, prefer the preset constructors — ChESS reads threshold as an absolute response floor, Radon as a fraction of the per-frame maximum.

pub fn with_radon<F: FnOnce(&mut RadonConfig)>(self, f: F) -> Self

Mirror of Self::with_chess for the Radon strategy.

pub fn with_threshold(self, threshold: f32) -> Self

Replace the acceptance threshold. See DetectorConfig::threshold for the per-detector interpretation.

pub fn with_multiscale(self, multiscale: MultiscaleConfig) -> Self

Replace the multiscale configuration.

pub fn with_upscale(self, upscale: UpscaleConfig) -> Self

Replace the upscale configuration.

pub fn with_orientation_method(self, method: OrientationMethod) -> Self

Replace the orientation-fit method used when building descriptors.

pub fn without_orientation(self) -> Self

Skip the per-corner orientation fit. Descriptors are still produced with subpixel positions and responses, but carry axes: None. Use this when you derive board geometry yourself and don’t need the per-corner axes — it removes the dominant per-corner cost.

pub fn with_merge_radius(self, radius: f32) -> Self

Replace the merge radius for cross-level duplicate suppression.

pub fn with_detection<F: FnOnce(&mut DetectionParams)>(self, f: F) -> Self

Apply f to the shared DetectionParams (NMS / clustering thresholds honoured by both strategies) and return the updated config.

pub fn chess_params(&self) -> ChessParams

Lower this config into the ChessParams consumed by the chess-corners-core response and detection stages. Use this when driving the core stage functions directly instead of through Detector. Only meaningful when Self::strategy is the ChESS variant.

When the active strategy is DetectionStrategy::Radon, the ChESS-specific fields fall back to their ChessParams::default() values; callers should route through Self::radon_detector_params instead.

pub fn radon_detector_params(&self) -> RadonDetectorParams

Lower this config into the RadonDetectorParams consumed by the chess-corners-core Radon response and detection stages. Use this when driving the core stage functions directly instead of through Detector. Only meaningful when Self::strategy is the Radon variant.

When the active strategy is DetectionStrategy::Chess, the Radon-specific fields fall back to their RadonDetectorParams::default() values; callers should route through Self::chess_params instead.

Trait Implementations

impl Clone for DetectorConfig

fn clone(&self) -> DetectorConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DetectorConfig

impl Debug for DetectorConfig

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

Formats the value using the given formatter.

impl Default for DetectorConfig

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for DetectorConfig

where DetectorConfig: Default,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for DetectorConfig

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for DetectorConfig

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 DetectorConfig