1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233
| """ Snapdragon Ride DMS部署架构 """
from dataclasses import dataclass from typing import List, Dict from enum import Enum
class SnapdragonSoC(Enum): """Snapdragon Ride SoC型号""" SA8155P = "SA8155P" SA8255P = "SA8255P" SA8295P = "SA8295P"
@dataclass class DMSConfig: """DMS配置""" soc: SnapdragonSoC cameras: int = 2 resolution: tuple = (1280, 720) fps: int = 30 enable_fatigue: bool = True enable_distraction: bool = True enable_gaze_tracking: bool = True enable_phone_detection: bool = True max_latency_ms: int = 50 model_precision: str = "INT8"
class SnapdragonRideDMS: """ Snapdragon Ride DMS系统 架构: 1. 摄像头输入 → ISP → 预处理 2. AI推理 → Hexagon NPU 3. 后处理 → CPU 4. 输出 → CAN总线 """ def __init__(self, config: DMSConfig): self.config = config self.isp = self._init_isp() self.npu = self._init_npu() self.post_processor = self._init_post_processor() self.stats = { 'frame_count': 0, 'total_latency_ms': 0, 'max_latency_ms': 0, } def _init_isp(self) -> dict: """初始化ISP""" return { 'input_resolution': self.config.resolution, 'output_resolution': (640, 480), 'fps': self.config.fps, 'features': ['auto_exposure', 'auto_white_balance', 'noise_reduction'] } def _init_npu(self) -> dict: """初始化NPU""" models = {} if self.config.enable_fatigue: models['fatigue'] = { 'model': 'fatiguenet_int8.tflite', 'input_shape': (1, 3, 224, 224), 'output_shape': (1, 4), } if self.config.enable_distraction: models['distraction'] = { 'model': 'distraction_net_int8.tflite', 'input_shape': (1, 3, 224, 224), 'output_shape': (1, 6), } if self.config.enable_gaze_tracking: models['gaze'] = { 'model': 'gaze_net_int8.tflite', 'input_shape': (1, 3, 224, 224), 'output_shape': (1, 2), } return { 'models': models, 'precision': self.config.model_precision, 'accelerator': 'Hexagon', } def _init_post_processor(self) -> dict: """初始化后处理器""" return { 'smoothing_window': 5, 'threshold_fatigue': 0.7, 'threshold_distraction': 0.6, } def process_frame(self, frame_data: bytes) -> Dict: """ 处理单帧图像 Args: frame_data: 图像数据 Returns: 检测结果 """ import time start_time = time.time() preprocessed = self._isp_process(frame_data) inference_results = self._npu_inference(preprocessed) results = self._post_process(inference_results) latency = (time.time() - start_time) * 1000 self.stats['frame_count'] += 1 self.stats['total_latency_ms'] += latency self.stats['max_latency_ms'] = max(self.stats['max_latency_ms'], latency) results['latency_ms'] = latency return results def _isp_process(self, frame_data: bytes) -> dict: """ISP预处理""" return { 'fatigue_input': 'preprocessed_tensor', 'distraction_input': 'preprocessed_tensor', 'gaze_input': 'preprocessed_tensor', } def _npu_inference(self, inputs: dict) -> dict: """NPU推理""" import numpy as np return { 'fatigue_logits': np.random.rand(1, 4), 'distraction_logits': np.random.rand(1, 6), 'gaze_output': np.random.rand(1, 2) * 60 - 30, } def _post_process(self, inference_results: dict) -> dict: """后处理""" import numpy as np fatigue_classes = ['awake', 'mild', 'moderate', 'severe'] fatigue_probs = self._softmax(inference_results['fatigue_logits'][0]) fatigue_level = fatigue_classes[np.argmax(fatigue_probs)] distraction_classes = ['forward', 'left', 'right', 'down', 'phone', 'other'] distraction_probs = self._softmax(inference_results['distraction_logits'][0]) distraction_type = distraction_classes[np.argmax(distraction_probs)] return { 'fatigue': { 'level': fatigue_level, 'confidence': float(np.max(fatigue_probs)), }, 'distraction': { 'type': distraction_type, 'confidence': float(np.max(distraction_probs)), }, 'gaze': { 'yaw': float(inference_results['gaze_output'][0, 0]), 'pitch': float(inference_results['gaze_output'][0, 1]), }, } def _softmax(self, x): import numpy as np exp_x = np.exp(x - np.max(x)) return exp_x / exp_x.sum() def get_stats(self) -> dict: """获取性能统计""" if self.stats['frame_count'] == 0: return self.stats return { **self.stats, 'avg_latency_ms': self.stats['total_latency_ms'] / self.stats['frame_count'], }
if __name__ == "__main__": config = DMSConfig( soc=SnapdragonSoC.SA8255P, cameras=2, resolution=(1280, 720), fps=30, enable_fatigue=True, enable_distraction=True, enable_gaze_tracking=True, ) dms = SnapdragonRideDMS(config) print("=== Snapdragon Ride DMS测试 ===") print(f"SoC: {config.soc.value}") print(f"分辨率: {config.resolution}") print(f"帧率: {config.fps}") for i in range(10): result = dms.process_frame(b'dummy_frame') if i % 5 == 0: print(f"帧{i}: 疲劳={result['fatigue']['level']}, " f"分心={result['distraction']['type']}, " f"延迟={result['latency_ms']:.1f}ms") stats = dms.get_stats() print(f"\n平均延迟: {stats['avg_latency_ms']:.1f}ms") print(f"最大延迟: {stats['max_latency_ms']:.1f}ms")
|