import { Canvas } from "ppu-ocv";
import { BaseDocLayoutService } from "../core/base-doclayout.service.js";
import type { DocLayoutOptions, DocLayoutResult, DocLayoutResultWithMasks } from "../interface.js";
/**
 * Document layout analysis service for Node.js and Bun.
 *
 * Analyzes document images to detect layout regions (text, tables, images, etc.)
 * with bounding boxes in reading order.
 *
 * @example
 * ```ts
 * 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);
    /**
     * Fetches a resource from a URL and caches it locally.
     */
    private _fetchAndCache;
    /**
     * Loads a resource from a buffer, file path, URL, or default URL.
     */
    private _loadResource;
    protected initSessions(): Promise<void>;
    /**
     * Initializes the service by loading the ONNX model.
     * Must be called before {@link analyze}.
     */
    initialize(): Promise<void>;
    /** Checks if the service has been initialized with a model loaded. */
    isInitialized(): boolean;
    /**
     * Swap the ONNX model at runtime without recreating the service.
     *
     * @param model - New model as a file path, URL, or ArrayBuffer.
     */
    changeModel(model: ArrayBuffer | string): Promise<void>;
    /**
     * Run layout analysis on an image.
     *
     * @param image - Source image as `ArrayBuffer` or `Canvas`.
     * @returns Layout analysis result with detected regions in reading order.
     */
    analyze(image: ArrayBuffer | Canvas): Promise<DocLayoutResult | DocLayoutResultWithMasks>;
    /** Delete all locally cached ONNX model files. */
    clearModelCache(): void;
    /** Release the ONNX session and free resources. */
    destroy(): Promise<void>;
}
export default DocLayoutService;