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| """ Qualcomm平台IMS部署架构
平台:QCS8255 (中端) / QCS8295 (高端) 框架:SNPE (Snapdragon Neural Processing Engine) """
import numpy as np from typing import Tuple, List from dataclasses import dataclass
@dataclass class IMSConfig: """IMS系统配置""" platform: str = "QCS8255" npu_tops: float = 26.0 memory_gb: float = 8.0 dms_fps: int = 30 oms_fps: int = 15 dms_model: str = "dms_mobilenetv2_quantized.dlc" oms_model: str = "oms_yolov8n_quantized.dlc" cpd_radar: bool = True
class QualcommIMS: """ 高通平台IMS系统 功能: 1. DMS(驾驶员监控) 2. OMS(乘员监控) 3. CPD(儿童检测,雷达融合) """ def __init__(self, config: IMSConfig): self.config = config self.dms_runtime = None self.oms_runtime = None def initialize(self): """初始化SNPE运行时""" print(f"初始化IMS平台: {self.config.platform}") print(f"NPU算力: {self.config.npu_tops} TOPS") def process_dms(self, ir_frame: np.ndarray) -> dict: """ 处理DMS单帧 Args: ir_frame: IR摄像头帧 (H, W, C) Returns: { 'fatigue_level': 疲劳程度, 'distraction_type': 分心类型, 'gaze_vector': 视线向量, 'inference_time_ms': 推理时间 } """ input_tensor = self._preprocess(ir_frame, (224, 224)) start_time = self._get_timestamp_ms() inference_time = self._get_timestamp_ms() - start_time return { 'fatigue_level': 0.15, 'distraction_type': 0, 'gaze_vector': (1.0, 0.0, 0.0), 'inference_time_ms': inference_time } def process_oms(self, rgb_frame: np.ndarray) -> dict: """ 处理OMS单帧 Args: rgb_frame: RGB摄像头帧 (H, W, C) Returns: { 'occupants': 乘员列表, 'objects': 物品列表, 'inference_time_ms': 推理时间 } """ input_tensor = self._preprocess(rgb_frame, (640, 480)) start_time = self._get_timestamp_ms() inference_time = self._get_timestamp_ms() - start_time return { 'occupants': [ {'class': 'adult', 'position': (0.5, 0.5), 'confidence': 0.95} ], 'objects': [], 'inference_time_ms': inference_time } def process_cpd_fusion( self, rgb_frame: np.ndarray, radar_data: np.ndarray ) -> dict: """ CPD雷达+摄像头融合检测 Args: rgb_frame: RGB帧 radar_data: 雷达点云 Returns: CPD检测结果 """ oms_result = self.process_oms(rgb_frame) vital_signs = self._detect_vital_signs_radar(radar_data) if vital_signs['breathing_detected'] and len(oms_result['occupants']) == 0: return { 'child_detected': True, 'confidence': 0.92, 'source': 'radar_only' } return { 'child_detected': False, 'confidence': 0.98, 'source': 'fusion' } def _preprocess(self, frame: np.ndarray, target_size: Tuple[int, int]) -> np.ndarray: """图像预处理""" resized = self._resize(frame, target_size) normalized = resized.astype(np.float32) / 255.0 return normalized def _resize(self, frame: np.ndarray, size: Tuple[int, int]) -> np.ndarray: """缩放图像""" return frame def _detect_vital_signs_radar(self, radar_data: np.ndarray) -> dict: """雷达生命体征检测""" return { 'breathing_detected': False, 'heartbeat_detected': False, 'breathing_rate': 0, 'heartbeat_rate': 0 } def _get_timestamp_ms(self) -> int: """获取时间戳""" import time return int(time.time() * 1000)
def benchmark_ims(config: IMSConfig) -> dict: """ IMS性能基准测试 测试项: 1. DMS推理延迟 2. OMS推理延迟 3. CPD融合延迟 4. NPU利用率 5. 内存占用 """ ims = QualcommIMS(config) ims.initialize() ir_frame = np.random.randint(0, 255, (720, 1280, 3), dtype=np.uint8) rgb_frame = np.random.randint(0, 255, (720, 1280, 3), dtype=np.uint8) radar_data = np.random.randn(128, 256).astype(np.float32) dms_results = [] for _ in range(100): result = ims.process_dms(ir_frame) dms_results.append(result['inference_time_ms']) oms_results = [] for _ in range(100): result = ims.process_oms(rgb_frame) oms_results.append(result['inference_time_ms']) return { 'dms_avg_latency_ms': np.mean(dms_results), 'dms_p99_latency_ms': np.percentile(dms_results, 99), 'oms_avg_latency_ms': np.mean(oms_results), 'oms_p99_latency_ms': np.percentile(oms_results, 99), 'platform': config.platform }
if __name__ == "__main__": mid_config = IMSConfig( platform="QCS8255", npu_tops=26.0, memory_gb=8.0 ) high_config = IMSConfig( platform="QCS8295", npu_tops=70.0, memory_gb=16.0 ) print("=" * 60) print("Qualcomm平台IMS性能基准") print("=" * 60) mid_bench = benchmark_ims(mid_config) print(f"\n中端平台 ({mid_config.platform}):") print(f" DMS延迟: {mid_bench['dms_avg_latency_ms']:.1f}ms (avg), {mid_bench['dms_p99_latency_ms']:.1f}ms (P99)") print(f" OMS延迟: {mid_bench['oms_avg_latency_ms']:.1f}ms (avg), {mid_bench['oms_p99_latency_ms']:.1f}ms (P99)")
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