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| """ Seeing Machines DMS on Snapdragon Ride 集成架构示例 """
import numpy as np from typing import Dict, Tuple
class SeeingMachinesDMS: """ Seeing Machines DMS 软件栈 部署在 Qualcomm Snapdragon 平台 """ def __init__(self, config: Dict): self.face_detector = FaceDetector(config) self.eye_tracker = EyeTracker(config) self.head_pose_estimator = HeadPoseEstimator(config) self.behavior_analyzer = BehaviorAnalyzer(config) self._optimize_for_hexagon() def _optimize_for_hexagon(self): """Hexagon NPU 优化""" pass def process_frame(self, frame: np.ndarray) -> Dict: """ 处理单帧 Args: frame: 输入图像 (H, W, 3) Returns: result: DMS 结果 """ face_bbox, landmarks = self.face_detector.detect(frame) eye_state = self.eye_tracker.track(frame, landmarks) head_pose = self.head_pose_estimator.estimate(landmarks) behavior = self.behavior_analyzer.analyze(eye_state, head_pose) return { 'face_bbox': face_bbox, 'landmarks': landmarks, 'eye_state': eye_state, 'head_pose': head_pose, 'fatigue_level': behavior['fatigue'], 'distraction_type': behavior['distraction'], 'impairment_score': behavior['impairment'] }
class FaceDetector: """人脸检测(Hexagon 优化)""" def __init__(self, config: Dict): self.model = self._load_quantized_model() def _load_quantized_model(self): """加载量化模型""" return None def detect(self, frame: np.ndarray) -> Tuple: """检测人脸""" return (0, 0, 100, 100), np.zeros((68, 2))
class EyeTracker: """眼动追踪""" def __init__(self, config: Dict): self.pupil_detector = PupilDetector(config) self.gaze_estimator = GazeEstimator(config) def track(self, frame: np.ndarray, landmarks: np.ndarray) -> Dict: """追踪眼部状态""" left_eye = self._extract_eye(frame, landmarks, 'left') right_eye = self._extract_eye(frame, landmarks, 'right') left_pupil = self.pupil_detector.detect(left_eye) right_pupil = self.pupil_detector.detect(right_eye) gaze = self.gaze_estimator.estimate(left_pupil, right_pupil) left_openness = self._calculate_openness(left_eye, landmarks) right_openness = self._calculate_openness(right_eye, landmarks) return { 'left_pupil': left_pupil, 'right_pupil': right_pupil, 'gaze': gaze, 'left_openness': left_openness, 'right_openness': right_openness } def _extract_eye(self, frame, landmarks, side): """提取眼部区域""" return frame[100:150, 100:150] def _calculate_openness(self, eye, landmarks): """计算眼睑开度""" return 0.8
class PupilDetector: """瞳孔检测""" def detect(self, eye_image: np.ndarray) -> Tuple[float, float]: """检测瞳孔中心""" return (0.5, 0.5)
class GazeEstimator: """视线估计""" def estimate(self, left_pupil, right_pupil) -> Tuple[float, float]: """估计视线方向""" return (0.0, 0.0)
class HeadPoseEstimator: """头部姿态估计""" def estimate(self, landmarks: np.ndarray) -> Tuple[float, float, float]: """估计头部姿态""" return (0.0, 0.0, 0.0)
class BehaviorAnalyzer: """行为分析""" def __init__(self, config: Dict): self.perclos_window = config.get('perclos_window', 60) self.history = [] def analyze(self, eye_state: Dict, head_pose: Tuple) -> Dict: """分析行为""" openness = (eye_state['left_openness'] + eye_state['right_openness']) / 2 self.history.append(openness) if len(self.history) > self.perclos_window * 30: self.history.pop(0) perclos = self._calculate_perclos() fatigue = self._classify_fatigue(perclos) distraction = self._detect_distraction(eye_state['gaze']) impairment = self._detect_impairment(eye_state, head_pose) return { 'fatigue': fatigue, 'distraction': distraction, 'impairment': impairment, 'perclos': perclos } def _calculate_perclos(self) -> float: """计算 PERCLOS""" if not self.history: return 0 threshold = 0.2 closed_count = sum(1 for o in self.history if o < threshold) return closed_count / len(self.history) * 100 def _classify_fatigue(self, perclos: float) -> int: """分类疲劳等级""" if perclos < 15: return 0 elif perclos < 30: return 1 elif perclos < 50: return 2 else: return 3 def _detect_distraction(self, gaze: Tuple) -> str: """检测分心""" yaw, pitch = gaze if abs(yaw) > 30 or abs(pitch) > 20: return 'visual_distraction' return 'none' def _detect_impairment(self, eye_state: Dict, head_pose: Tuple) -> float: """检测损伤""" return 0.0
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