Struct OcrDetector 

pub struct OcrDetector { /* private fields */ }

Implementations

impl OcrDetector

pub fn text(engine: impl OcrEngine) -> Self

pub fn with_span_filter( self, filter: impl Fn(&TextSpan) -> bool + Send + 'static, ) -> Self

Add a span filter (true = keep), applied BEFORE sorting, joining, and change detection — a filtered span can never fire a Changed event. Filters compose; a span must pass all of them. Stock filters live in crate::filters.

pub fn number( engine: impl OcrEngine, parser: impl Fn(&str) -> Option<f64> + Send + 'static, ) -> Self

pub fn spans(engine: impl OcrEngine) -> Self

Trait Implementations

impl Detector for OcrDetector

fn evaluate( &mut self, view: &FrameView<'_>, ) -> Result<DetectorOutput, DetectorError>

fn is_heavy(&self) -> bool

Heavy detectors (OCR, ML inference) are routed to the blocking thread pool by the watcher loop so they never stall the async scheduler. Cheap pixel-math detectors keep the default false.