import * as faceDetection from '@tensorflow-models/face-detection';
/**
 * Enhanced ModelLoadingService
 * Supports multiple models: ID detection + face detection
 */
declare class ModelLoadingService {
    private backendReady;
    private backendPromise;
    private idDetectionModel;
    private idModelReady;
    private idModelPromise;
    private faceDetector;
    private faceModelReady;
    private faceModelPromise;
    /**
     * Initialize TensorFlow.js backend
     * This MUST be called before loading any models
     */
    initializeBackend(): Promise<void>;
    private _initBackend;
    /**
     * Initialize everything (backward compatible with your existing code)
     */
    initialize(): Promise<void>;
    /**
     * Non-blocking init (backward compatible)
     */
    init(): void;
    /**
     * Load ID Detection Model (your existing model)
     */
    loadIDDetectionModel(): Promise<void>;
    private _loadIDModel;
    /**
     * Load Face Detection Model
     */
    loadFaceDetectionModel(): Promise<void>;
    private _loadFaceModel;
    /**
     * Initialize both models at once
     */
    initializeAll(): Promise<void>;
    /**
     * Get ID Detection Model
     */
    getIDModel(): any | null;
    /**
     * Get Face Detection Model
     */
    getFaceDetector(): faceDetection.FaceDetector | null;
    /**
     * Check if ID model is ready
     */
    isIDModelReady(): boolean;
    /**
     * Check if face model is ready
     */
    isFaceModelReady(): boolean;
    /**
     * Check if backend is ready
     */
    isBackendReady(): boolean;
    /**
     * Legacy method - backward compatible
     */
    isReady(): boolean;
    /**
     * Detect faces using the loaded face detection model
     */
    detectFaces(input: HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): Promise<faceDetection.Face[]>;
    /**
     * Log current memory usage
     */
    private logMemory;
    /**
     * Get current backend name
     */
    getBackend(): string;
    /**
     * Clean up resources
     */
    dispose(): void;
}
export declare const modelLoadingService: ModelLoadingService;
export {};