import type { Face, FaceDetectionOptions, UseFaceDetectionResult } from '../types';
/**
 * Options for useFaceDetection hook
 */
export interface UseFaceDetectionOptions extends FaceDetectionOptions {
    /** Whether detection is enabled. Default: true */
    enabled?: boolean;
    /** Maximum number of faces to track. Default: 5 */
    maxFaces?: number;
    /** Callback when faces change */
    onFacesChanged?: (faces: Face[]) => void;
}
/**
 * Hook for managing face detection state
 *
 * Use this hook to get face detection results outside of the SmartCamera component.
 *
 * @param options - Face detection options
 * @returns Face detection state
 *
 * @example
 * ```tsx
 * function FaceTracker() {
 *   const { faces, isDetecting } = useFaceDetection({
 *     performanceMode: 'fast',
 *     classificationMode: 'all',
 *     onFacesChanged: (faces) => {
 *       console.log('Detected faces:', faces.length);
 *     },
 *   });
 *
 *   return (
 *     <View>
 *       <Text>Faces detected: {faces.length}</Text>
 *       {faces.map((face, i) => (
 *         <Text key={i}>
 *           Smiling: {(face.smilingProbability ?? 0) * 100}%
 *         </Text>
 *       ))}
 *     </View>
 *   );
 * }
 * ```
 */
export declare function useFaceDetection(options?: UseFaceDetectionOptions): UseFaceDetectionResult;
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