import type { CanvasLike } from "ppu-ocv/web";
import { BaseDocLayoutService } from "../core/base-doclayout.service.js";
import type { DocLayoutOptions, DocLayoutResult, DocLayoutResultWithMasks } from "../interface.js";
/**
 * Document layout analysis service for Web/Browser environments.
 *
 * Uses onnxruntime-web (WebAssembly) to run PP-DocLayout models
 * directly inside the browser.
 *
 * @example
 * ```ts
 * import { DocLayoutService } from "ppu-doclayout/web";
 *
 * const service = new DocLayoutService();
 * await service.initialize();
 * const result = await service.analyze(imageBuffer);
 * console.log(result.boxes);
 * await service.destroy();
 * ```
 */
export declare class DocLayoutService extends BaseDocLayoutService {
    constructor(options?: DocLayoutOptions);
    protected initSessions(): Promise<void>;
    /**
     * Loads a resource from a URL or ArrayBuffer.
     */
    private _loadResource;
    /**
     * Initialize the service by loading the ONNX model.
     * Must be called before {@link analyze}.
     */
    initialize(): Promise<void>;
    /** Checks if the service has been initialized. */
    isInitialized(): boolean;
    /**
     * Swap the ONNX model at runtime.
     *
     * @param model - New model as a URL string or ArrayBuffer.
     */
    changeModel(model: ArrayBuffer | string): Promise<void>;
    /**
     * Run layout analysis on an image.
     *
     * @param image - Source image as `ArrayBuffer` or `CanvasLike`.
     * @returns Layout analysis result with detected regions in reading order.
     */
    analyze(image: ArrayBuffer | CanvasLike): Promise<DocLayoutResult | DocLayoutResultWithMasks>;
    /** Release the ONNX session and free resources. */
    destroy(): Promise<void>;
}
export default DocLayoutService;