import type { OpenFileLimits } from "../contracts.js";
export type OcrLanguage = "eng" | "chi_sim";
export type OcrLanguageSelection = "eng" | "chi_sim" | "eng+chi_sim" | "chi_sim+eng";
export interface OcrEngineResult {
    readonly text: string;
    readonly confidence: number;
}
export interface OcrEngine {
    recognize(imagePath: string, languages: readonly OcrLanguage[], signal: AbortSignal): Promise<OcrEngineResult>;
}
export interface OcrResult extends OcrEngineResult {
    readonly part_ref: string;
    readonly source_sha256: string;
    readonly parser: "tesseract-local";
    readonly languages: readonly OcrLanguage[];
    readonly locator: Readonly<Record<string, string | number | boolean | null>>;
    readonly cursor: null;
}
export declare class OcrService {
    private readonly engine;
    constructor(engine: OcrEngine);
    run(input: {
        readonly imagePath: string;
        readonly outputPath: string;
        readonly partRef: string;
        readonly sourceSha256: string;
        readonly languages: string;
        readonly locator: Readonly<Record<string, string | number | boolean | null>>;
        readonly limits: Readonly<OpenFileLimits>;
        readonly signal?: AbortSignal;
    }): Promise<OcrResult>;
}