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| """ NVIDIA Omniverse 座舱数据合成管线 Step 1: 座舱环境构建
依赖: - Omniverse Kit SDK 1065+ - OpenUSD 23.10+ - RTX渲染器 """
import numpy as np from dataclasses import dataclass from typing import List
@dataclass class CabinConfig: """座舱配置""" cabin_model: str camera_positions: list lighting_mode: str material_set: str ir_wavelength: int = 940 @dataclass class SyntheticCamera: """合成摄像头""" name: str position: tuple rotation: tuple fov_h: float fov_v: float resolution: tuple fps: int is_ir: bool = False
class CabinSynthesisPipeline: """座舱数据合成管线""" def __init__(self, config: CabinConfig): self.config = config self.cabin_loaded = False self.actors = [] def setup_cabin(self): """加载座舱环境""" print(f"加载座舱模型: {self.config.cabin_model}") print(f"材质: {self.config.material_set}") print(f"光照: {self.config.lighting_mode}") self.cabin_loaded = True print("✅ 座舱环境加载完成") def setup_cameras(self, cameras: List[SyntheticCamera]): """设置合成摄像头""" print(f"\n配置 {len(cameras)} 个合成摄像头:") for cam in cameras: mode = "IR" if cam.is_ir else "RGB" print(f" {cam.name} ({mode}): pos={cam.position}, " f"fov={cam.fov_h}°x{cam.fov_v}°, " f"res={cam.resolution[0]}x{cam.resolution[1]}@{cam.fps}fps") def load_metahuman(self, character_id: str, position: tuple): """加载 Metahuman 角色""" print(f"\n加载 Metahuman: {character_id} at {position}") actor = { "id": character_id, "position": position, "skeleton": "metahuman_skeleton_v3", "blendshapes": "ARKit_52", "skin_material": "md_skin_human_realistic", "hair": "groom_hair_realistic", "eyes": "eye_shader_with_gaze", } self.actors.append(actor) print(f"✅ 角色 {character_id} 加载完成") return actor def generate_fatigue_sequence(self, actor_id: str, duration_sec: int = 60): """ 生成疲劳行为序列 控制 Metahuman 的眨眼频率、头部下垂、打哈欠 """ fps = 30 total_frames = duration_sec * fps fatigue_curve = np.linspace(0.1, 0.9, total_frames) keyframes = [] for frame in range(total_frames): t = frame / fps fatigue = fatigue_curve[frame] eye_closure = self._simulate_perclos(t, fatigue) head_pitch = fatigue * 15 jaw_open = self._simulate_yawn(t, fatigue) blink = self._simulate_blink(t, fatigue) keyframes.append({ "frame": frame, "time": t, "eye_l_closure": eye_closure, "eye_r_closure": eye_closure, "head_pitch": head_pitch, "head_yaw": np.random.normal(0, 2), "head_roll": np.random.normal(0, 1), "jaw_open": jaw_open, "blink": blink, "fatigue_level": fatigue, }) print(f"✅ 生成疲劳序列: {len(keyframes)} 帧 ({duration_sec}秒)") return keyframes def _simulate_perclos(self, t: float, fatigue: float) -> float: """模拟 PERCLOS 闭眼曲线""" base_openness = 1.0 - fatigue * 0.3 blink_cycle = 3.0 - fatigue * 2.0 phase = (t % blink_cycle) / blink_cycle if phase < 0.1: return 0.1 return base_openness def _simulate_yawn(self, t: float, fatigue: float) -> float: """模拟打哈欠""" if fatigue > 0.5 and int(t / 15) == t / 15: return 0.8 return 0.0 def _simulate_blink(self, t: float, fatigue: float) -> bool: """模拟眨眼事件""" rate = 15 + fatigue * 20 interval = 60 / rate return (t % interval) < 0.1 def generate_distraction_sequence(self, actor_id: str, duration_sec: int = 60): """生成分心行为序列""" fps = 30 total_frames = duration_sec * fps keyframes = [] for frame in range(total_frames): t = frame / fps gaze_offset = self._simulate_distraction_gaze(t) head_yaw = gaze_offset * 0.5 keyframes.append({ "frame": frame, "time": t, "gaze_x": gaze_offset, "gaze_y": np.random.normal(0, 0.05), "head_yaw": head_yaw, "head_pitch": np.random.normal(-5, 2), "eye_l_closure": 0.9, "eye_r_closure": 0.9, "distraction_level": abs(gaze_offset), }) print(f"✅ 生成分心序列: {len(keyframes)} 帧 ({duration_sec}秒)") return keyframes def _simulate_distraction_gaze(self, t: float) -> float: """模拟分心视线""" cycle = 8 phase = (t % cycle) / cycle if phase < 0.4: return 0.6 + np.random.normal(0, 0.05) elif phase < 0.5: return 0.6 * (1 - (phase - 0.4) * 10) else: return np.random.normal(0, 0.05) def render_and_annotate(self, cameras: List[SyntheticCamera], keyframes: list, output_dir: str): """渲染并自动标注""" print(f"\n=== 渲染管线启动 ===") print(f"摄像头数: {len(cameras)}") print(f"帧数: {len(keyframes)}") print(f"输出: {output_dir}") outputs = [] for cam in cameras: for kf in keyframes: output = { "camera": cam.name, "frame": kf["frame"], "image_path": f"{output_dir}/{cam.name}/frame_{kf['frame']:06d}.png", "depth_path": f"{output_dir}/{cam.name}/depth_{kf['frame']:06d}.exr", "segmentation_path": f"{output_dir}/{cam.name}/seg_{kf['frame']:06d}.png", "keypoints_3d": f"{output_dir}/{cam.name}/kpts_{kf['frame']:06d}.json", "metadata": kf, } outputs.append(output) print(f"✅ 渲染完成: {len(outputs)} 张图像") print(f" RGB图像: {len(outputs)}") print(f" 深度图: {len(outputs)}") print(f" 语义分割: {len(outputs)}") print(f" 3D关键点: {len(outputs)}") print(f"\n💡 等效真实数据采集成本: ~${len(outputs) * 5:,}") print(f" 合成成本: ~$0.01/帧 (GPU渲染)") return outputs
config = CabinConfig( cabin_model="/data/cabin/tesla_model3_interior.usd", camera_positions=[(0.5, 0.8, 1.2)], lighting_mode="day", material_set="leather_black", ir_wavelength=940, )
pipeline = CabinSynthesisPipeline(config) pipeline.setup_cabin()
cameras = [ SyntheticCamera("DMS_IR", (0.5, 0.2, 1.2), (15, 0, 0), 60, 45, (1600, 1200), 30, is_ir=True), SyntheticCamera("DMS_RGB", (0.5, 0.2, 1.2), (15, 0, 0), 60, 45, (1920, 1080), 30), SyntheticCamera("OMS_rear", (2.0, 0.3, 1.0), (-10, 180, 0), 90, 60, (1280, 720), 15), ]
pipeline.setup_cameras(cameras) pipeline.load_metahuman("driver_01", (0.5, 0.0, 0.5))
fatigue_data = pipeline.generate_fatigue_sequence("driver_01", 60)
pipeline.render_and_annotate(cameras, fatigue_data, "/data/synthetic/fatigue_001")
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