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| """ Qualcomm Snapdragon DMS 部署架构示例
支持两种部署模式: 1. 座舱平台集成(信息娱乐系统) 2. ADAS 平台集成(集中式计算) """
import numpy as np import time from typing import Dict, Optional from dataclasses import dataclass
@dataclass class DMSConfig: """DMS 配置""" platform: str = "QCS8255" camera_resolution: tuple = (1280, 800) camera_fps: int = 30 face_detection_model: str = "yolov7-tiny" landmark_model: str = "dlib-68" use_npu: bool = True quantization: str = "int8" target_fps: int = 25
class SnapdragonDMS: """ 高通 Snapdragon 平台 DMS 实现 """ def __init__(self, config: DMSConfig): self.config = config self._init_models() self.frame_times = [] self.avg_fps = 0.0 def _init_models(self): """初始化模型(模拟)""" self.face_detector = None self.landmark_estimator = None self.gaze_estimator = None def process_frame(self, frame: np.ndarray) -> Dict: """ 处理单帧 Args: frame: IR 图像 (H, W) 或 (H, W, 3) Returns: 检测结果 """ start_time = time.time() result = { 'face_detected': False, 'landmarks': None, 'gaze_vector': None, 'drowsiness_score': 0.0, 'distraction_score': 0.0, 'processing_time_ms': 0.0 } face_bbox = self._detect_face(frame) if face_bbox is not None: result['face_detected'] = True landmarks = self._estimate_landmarks(frame, face_bbox) result['landmarks'] = landmarks gaze = self._estimate_gaze(landmarks) result['gaze_vector'] = gaze result['drowsiness_score'] = self._analyze_drowsiness(landmarks) result['distraction_score'] = self._analyze_distraction(gaze) elapsed = (time.time() - start_time) * 1000 result['processing_time_ms'] = elapsed self._update_fps(elapsed) return result def _detect_face(self, frame: np.ndarray) -> Optional[np.ndarray]: """ 人脸检测(SNPE NPU 加速) 实际部署使用 SNPE (Snapdragon Neural Processing Engine) """ h, w = frame.shape[:2] return np.array([w//4, h//4, 3*w//4, 3*h//4]) def _estimate_landmarks(self, frame: np.ndarray, face_bbox: np.ndarray) -> np.ndarray: """ 关键点估计 使用 dlib 或自定义模型 """ return np.random.randint(0, 100, (68, 2)) def _estimate_gaze(self, landmarks: np.ndarray) -> np.ndarray: """ 视线估计 """ return np.array([0, 0, 1]) def _analyze_drowsiness(self, landmarks: np.ndarray) -> float: """ 疲劳分析 基于 PERCLOS 计算 """ return 0.0 def _analyze_distraction(self, gaze: np.ndarray) -> float: """ 分心分析 基于视线偏离角度 """ return 0.0 def _update_fps(self, elapsed_ms: float): """更新 FPS 统计""" self.frame_times.append(elapsed_ms) if len(self.frame_times) > 30: self.frame_times.pop(0) self.avg_fps = 1000.0 / np.mean(self.frame_times)
class SnapdragonOptimizations: """ Snapdragon 平台特定优化 """ @staticmethod def quantize_model(model_path: str, output_path: str): """ 模型量化 使用 Qualcomm SNPE 工具链将 FP32 模型转换为 INT8 """ pass @staticmethod def enable_npu(): """ 启用 NPU 加速 """ pass @staticmethod def optimize_memory(): """ 内存优化 Snapdragon 平台内存管理 """ pass
if __name__ == "__main__": config = DMSConfig( platform="QCS8255", camera_resolution=(1280, 800), camera_fps=30, use_npu=True, quantization="int8", target_fps=25 ) dms = SnapdragonDMS(config) for i in range(100): frame = np.random.randint(0, 255, (800, 1280), dtype=np.uint8) result = dms.process_frame(frame) if i % 10 == 0: print(f"[帧 {i}] FPS: {dms.avg_fps:.1f}, " f"处理时间: {result['processing_time_ms']:.1f}ms")
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