import { PaddleOCROptions, OCRResult, TableResult, LayoutResult, ProcessOptions } from "../typings";
/**
 * PaddleOCR Worker助手类
 * 用于简化在浏览器中使用Web Worker的过程
 */
export declare class PaddleOCRWorker {
    private worker;
    private pendingRequests;
    private options;
    private isInitialized;
    private workerUrl;
    /**
     * 构造函数
     * @param options PaddleOCR选项
     * @param workerUrl Worker脚本URL，默认为"paddle-ocr-worker.js"
     */
    constructor(options: PaddleOCROptions, workerUrl?: string);
    /**
     * 初始化Worker
     */
    init(): Promise<void>;
    /**
     * 文本识别
     * @param image 图像数据
     * @param processOptions 处理选项
     * @returns 识别结果
     */
    recognize(image: ImageData | HTMLCanvasElement | HTMLImageElement, processOptions?: ProcessOptions): Promise<OCRResult>;
    /**
     * 表格识别
     * @param image 图像数据
     * @param processOptions 处理选项
     * @returns 表格识别结果
     */
    recognizeTable(image: ImageData | HTMLCanvasElement | HTMLImageElement, processOptions?: ProcessOptions): Promise<TableResult>;
    /**
     * 版面分析
     * @param image 图像数据
     * @param processOptions 处理选项
     * @returns 版面分析结果
     */
    analyzeLayout(image: ImageData | HTMLCanvasElement | HTMLImageElement, processOptions?: ProcessOptions): Promise<LayoutResult>;
    /**
     * 销毁Worker
     */
    dispose(): void;
    /**
     * 更新选项
     * @param options 新的选项
     */
    updateOptions(options: Partial<PaddleOCROptions>): Promise<void>;
    /**
     * 发送消息到Worker
     * @param type 消息类型
     * @param data 消息数据
     * @returns 处理结果的Promise
     */
    private sendMessage;
    /**
     * 处理Worker消息
     * @param event 消息事件
     */
    private handleWorkerMessage;
}