# Duchenne marker (eye squint) left_eye_open = eye_aspect_ratio(face_landmarks, is_left=True) right_eye_open = eye_aspect_ratio(face_landmarks, is_left=False) duchenne = 1 if (left_eye_open < 0.25 and right_eye_open < 0.25) else 0

Future<double> detectSmile(CameraImage image) async // Convert CameraImage to tensor input (224x224 RGB) var input = preprocessImage(image); var output = List.filled(1, 0).reshape([1, 1]); // output: smile score 0-1

final_score = (intensity * 0.4) + (symmetry * 0.4) + (duchenne * 20) return round(min(100, final_score), 2) // smile_detector.dart import 'package:tflite_flutter/tflite_flutter.dart'; import 'package:camera/camera.dart'; class SmileDetector Interpreter? _interpreter;