import type { Face, BlinkEvent } from '../types';
/**
 * Process faces to detect blinks
 *
 * @param faces - Array of detected faces
 * @param lastBlinkTimestamp - Timestamp of the last detected blink
 * @param debounceMs - Minimum time between blinks in milliseconds
 * @returns BlinkEvent if a blink was detected, null otherwise
 */
export declare function processBlinkFromFaces(faces: Face[], lastBlinkTimestamp: number, debounceMs?: number): BlinkEvent | null;
/**
 * Reset blink state for all faces
 */
export declare function resetBlinkStates(): void;
/**
 * Get current eye state without blink detection
 * Useful for real-time eye tracking UI
 */
export declare function getEyeState(face: Face): {
    leftOpen: number;
    rightOpen: number;
} | null;
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