import type { NativeRecognizedLine } from '../RnAfIdentityOcr.types';
export type MrzFormat = 'TD1' | 'TD3';
export type MrzCandidate = {
    format: MrzFormat;
    /** Normalized and fitted to the format's fixed line length. */
    lines: string[];
    /** Mean OCR confidence of the source lines, 0..1. */
    confidence: number;
};
/** Same shape as af-identity-scanner RecognitionResult (lines only). */
export type MrzRecognition = {
    lines: NativeRecognizedLine[];
};
/**
 * Uppercases, drops whitespace, maps chevron lookalikes, and strips anything
 * outside the MRZ charset. Letter/digit confusions (O/0, I/1) are left for the
 * check-digit-guided autocorrect in the parser.
 *
 * Important: OCR often emits `«` (guillemet) for a *single* `<`. Mapping that to
 * `<<` inflates the line past 44/30 chars; fitLength then truncates the start and
 * chops off trailing check digits so `mrz` parse throws.
 */
export declare function normalizeMrzText(text: string): string;
/**
 * Finds the MRZ among recognized lines by shape and position: chevron filler,
 * minimum length, and bottom-of-document placement.
 *
 * Core algorithm matches af-identity-scanner. Also splits merged ~88-char TD3
 * (or ~90-char TD1) OCR lines, and falls back to scraping `P<…` from compacted text.
 */
export declare function locateMrz(recognition: MrzRecognition | NativeRecognizedLine[]): MrzCandidate | null;
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