import Tesseract from 'tesseract.js';
import { PostMessageble } from '../hook/adapter.js';
import { OcrWorker } from './ocr.dto.js';
export declare const ocrWorkerStorage: Map<string, OcrWorker>;
export declare function saveBase64ImageData(base64String: string, mimeType: string): string;
export declare function loadBase64ImageData(fileName: string): string;
export declare function tesseractOCR(imagePath: string, logger: (message: Tesseract.LoggerMessage) => void, lang?: string): Promise<string>;
export declare function createOcrWorker(filename: string, webview: PostMessageble): OcrWorker;