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| class NIRDMSCamera: """ 近红外DMS摄像头 应用于:驾驶员状态监测 """ def __init__(self): self.specs = { 'wavelength': 850, 'resolution': (1280, 720), 'fov': (60, 40), 'ir_led_power': 2 } def monitor_driver(self, nir_frame): """ 监测驾驶员状态 Args: nir_frame: NIR图像帧 Returns: status: { 'gaze_direction': (x, y, z), 'blink_rate': float, 'head_pose': (yaw, pitch, roll), 'drowsiness_level': int } """ face = self.detect_face(nir_frame) eyes = self.extract_eye_features(face) status = { 'gaze_direction': self.estimate_gaze(eyes), 'blink_rate': self.compute_blink_rate(eyes), 'head_pose': self.estimate_head_pose(face), 'drowsiness_level': self.detect_drowsiness(eyes) } return status def detect_drowsiness(self, eye_features): """ 基于NIR检测疲劳 """ eyelid_openness = eye_features['eyelid_openness'] window = 60 perclos = np.mean(eyelid_openness < 0.2) return int(perclos * 10)
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