为了安全地在各种复杂的交通情况下进行导航,自动驾驶系统通常配备了运动预测模块,为下游计划模块提供重要信息。对于现实世界应用应用程序,运动预测模型的准确性和延迟都是必不可少的。在本报告中,我们提出了一个有效而有效的解决方案,该解决方案是2022年Argoverse 2运动预测挑战中的第三名。
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预测公路参与者的未来运动对于自动驾驶至关重要,但由于令人震惊的运动不确定性,因此极具挑战性。最近,大多数运动预测方法求助于基于目标的策略,即预测运动轨迹的终点,作为回归整个轨迹的条件,以便可以减少解决方案的搜索空间。但是,准确的目标坐标很难预测和评估。此外,目的地的点表示限制了丰富的道路环境的利用,从而导致预测不准确。目标区域,即可能的目的地区域,而不是目标坐标,可以通过涉及更多的容忍度和指导来提供更软的限制,以搜索潜在的轨迹。考虑到这一点,我们提出了一个新的基于目标区域的框架,名为“目标区域网络”(GANET)进行运动预测,该框架对目标区域进行了建模,而不是确切的目标坐标作为轨迹预测的先决条件,更加可靠,更准确地执行。具体而言,我们建议一个goicrop(目标的目标区域)操作员有效地提取目标区域中的语义巷特征,并在目标区域和模型演员的未来互动中提取语义巷,这对未来的轨迹估计很大。 Ganet在所有公共文献(直到论文提交)中排名第一个,将其源代码排在第一位。
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Accurately predicting interactive road agents' future trajectories and planning a socially compliant and human-like trajectory accordingly are important for autonomous vehicles. In this paper, we propose a planning-centric prediction neural network, which takes surrounding agents' historical states and map context information as input, and outputs the joint multi-modal prediction trajectories for surrounding agents, as well as a sequence of control commands for the ego vehicle by imitation learning. An agent-agent interaction module along the time axis is proposed in our network architecture to better comprehend the relationship among all the other intelligent agents on the road. To incorporate the map's topological information, a Dynamic Graph Convolutional Neural Network (DGCNN) is employed to process the road network topology. Besides, the whole architecture can serve as a backbone for the Differentiable Integrated motion Prediction with Planning (DIPP) method by providing accurate prediction results and initial planning commands. Experiments are conducted on real-world datasets to demonstrate the improvements made by our proposed method in both planning and prediction accuracy compared to the previous state-of-the-art methods.
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预测附近代理商的合理的未来轨迹是自治车辆安全的核心挑战,主要取决于两个外部线索:动态邻居代理和静态场景上下文。最近的方法在分别表征两个线索方面取得了很大进展。然而,它们忽略了两个线索之间的相关性,并且大多数很难实现地图自适应预测。在本文中,我们使用Lane作为场景数据,并提出一个分阶段网络,即共同学习代理和车道信息,用于多模式轨迹预测(JAL-MTP)。 JAL-MTP使用社交到LANE(S2L)模块来共同代表静态道和相邻代理的动态运动作为实例级车道,一种用于利用实例级车道来预测的反复出的车道注意力(RLA)机制来预测Map-Adaptive Future Trajections和两个选择器,可识别典型和合理的轨迹。在公共协议数据集上进行的实验表明JAL-MTP在定量和定性中显着优于现有模型。
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从社交机器人到自动驾驶汽车,多种代理的运动预测(MP)是任意复杂环境中的至关重要任务。当前方法使用端到端网络解决了此问题,其中输入数据通常是场景的最高视图和所有代理的过去轨迹;利用此信息是获得最佳性能的必不可少的。从这个意义上讲,可靠的自动驾驶(AD)系统必须按时产生合理的预测,但是,尽管其中许多方法使用了简单的Convnets和LSTM,但在使用两个信息源时,模型对于实时应用程序可能不够有效(地图和轨迹历史)。此外,这些模型的性能在很大程度上取决于训练数据的数量,这可能很昂贵(尤其是带注释的HD地图)。在这项工作中,我们探讨了如何使用有效的基于注意力的模型在Argoverse 1.0基准上实现竞争性能,该模型将其作为最小地图信息的过去轨迹和基于地图的功能的输入,以确保有效且可靠的MP。这些功能代表可解释的信息作为可驱动区域和合理的目标点,与基于黑框CNN的地图处理方法相反。
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Predicting the future motion of dynamic agents is of paramount importance to ensure safety or assess risks in motion planning for autonomous robots. In this paper, we propose a two-stage motion prediction method, referred to as R-Pred, that effectively utilizes both the scene and interaction context using a cascade of the initial trajectory proposal network and the trajectory refinement network. The initial trajectory proposal network produces M trajectory proposals corresponding to M modes of a future trajectory distribution. The trajectory refinement network enhances each of M proposals using 1) the tube-query scene attention (TQSA) and 2) the proposal-level interaction attention (PIA). TQSA uses tube-queries to aggregate the local scene context features pooled from proximity around the trajectory proposals of interest. PIA further enhances the trajectory proposals by modeling inter-agent interactions using a group of trajectory proposals selected based on their distances from neighboring agents. Our experiments conducted on the Argoverse and nuScenes datasets demonstrate that the proposed refinement network provides significant performance improvements compared to the single-stage baseline and that R-Pred achieves state-of-the-art performance in some categories of the benchmark.
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Modern autonomous driving system is characterized as modular tasks in sequential order, i.e., perception, prediction and planning. As sensors and hardware get improved, there is trending popularity to devise a system that can perform a wide diversity of tasks to fulfill higher-level intelligence. Contemporary approaches resort to either deploying standalone models for individual tasks, or designing a multi-task paradigm with separate heads. These might suffer from accumulative error or negative transfer effect. Instead, we argue that a favorable algorithm framework should be devised and optimized in pursuit of the ultimate goal, i.e. planning of the self-driving-car. Oriented at this goal, we revisit the key components within perception and prediction. We analyze each module and prioritize the tasks hierarchically, such that all these tasks contribute to planning (the goal). To this end, we introduce Unified Autonomous Driving (UniAD), the first comprehensive framework up-to-date that incorporates full-stack driving tasks in one network. It is exquisitely devised to leverage advantages of each module, and provide complementary feature abstractions for agent interaction from a global perspective. Tasks are communicated with unified query design to facilitate each other toward planning. We instantiate UniAD on the challenging nuScenes benchmark. With extensive ablations, the effectiveness of using such a philosophy is proven to surpass previous state-of-the-arts by a large margin in all aspects. The full suite of codebase and models would be available to facilitate future research in the community.
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自主驾驶的运动预测领域的先前艺术倾向于寻找接近地面真理轨迹的轨迹。但是,这种问题的表述和方法经常导致多样性和偏见轨迹预测的丧失。因此,它们不适合现实世界的自主驾驶,在这种驾驶中,多样化和依赖道路的多模式轨迹预测对安全至关重要。为此,本研究提出了一种新颖的损失函数\ textit {lane损失},可确保地图自适应多样性并适应几何约束。对带有新型轨迹候选建议模块的两阶段轨迹预测架构,\ textit {轨迹预测注意(TPA)}经过训练,通过车道损失训练,鼓励多个轨迹分布多样,以涵盖可行的方式以图像意识的方式涵盖可行的操作。此外,考虑到现有的轨迹性能指标正在重点是基于地面真理未来轨迹评估准确性,因此还建议定量评估指标来评估预测的多个轨迹的多样性。在Argoverse数据集上进行的实验表明,所提出的方法显着提高了预测轨迹的多样性,而无需牺牲预测准确性。
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预测场景中代理的未来位置是自动驾驶中的一个重要问题。近年来,在代表现场及其代理商方面取得了重大进展。代理与场景和彼此之间的相互作用通常由图神经网络建模。但是,图形结构主要是静态的,无法表示高度动态场景中的时间变化。在这项工作中,我们提出了一个时间图表示,以更好地捕获流量场景中的动态。我们用两种类型的内存模块补充表示形式。一个专注于感兴趣的代理,另一个专注于整个场景。这使我们能够学习暂时意识的表示,即使对多个未来进行简单回归,也可以取得良好的结果。当与目标条件预测结合使用时,我们会显示出更好的结果,可以在Argoverse基准中达到最先进的性能。
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相应地预测周围交通参与者的未来状态,并计划安全,平稳且符合社会的轨迹对于自动驾驶汽车至关重要。当前的自主驾驶系统有两个主要问题:预测模块通常与计划模块解耦,并且计划的成本功能很难指定和调整。为了解决这些问题,我们提出了一个端到端的可区分框架,该框架集成了预测和计划模块,并能够从数据中学习成本函数。具体而言,我们采用可区分的非线性优化器作为运动计划者,该运动计划将神经网络给出的周围剂的预测轨迹作为输入,并优化了自动驾驶汽车的轨迹,从而使框架中的所有操作都可以在框架中具有可观的成本,包括成本功能权重。提出的框架经过大规模的现实驾驶数据集进行了训练,以模仿整个驾驶场景中的人类驾驶轨迹,并在开环和闭环界面中进行了验证。开环测试结果表明,所提出的方法的表现优于各种指标的基线方法,并提供以计划为中心的预测结果,从而使计划模块能够输出接近人类的轨迹。在闭环测试中,提出的方法表明能够处理复杂的城市驾驶场景和鲁棒性,以抵抗模仿学习方法所遭受的分配转移。重要的是,我们发现计划和预测模块的联合培训比在开环和闭环测试中使用单独的训练有素的预测模块进行计划要比计划更好。此外,消融研究表明,框架中的可学习组件对于确保计划稳定性和性能至关重要。
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自动驾驶的运动预测是一项艰巨的任务,因为复杂的驾驶场景导致静态和动态输入的异质组合。这是一个开放的问题,如何最好地表示和融合有关道路几何,车道连接,时变的交通信号状态以及动态代理的历史及其相互作用的历史。为了模拟这一不同的输入功能集,许多提出的方法旨在设计具有多种模态模块的同样复杂系统。这导致难以按严格的方式进行扩展,扩展或调整的系统以进行质量和效率。在本文中,我们介绍了Wayformer,这是一个基于注意力的运动架构,用于运动预测,简单而均匀。 Wayformer提供了一个紧凑的模型描述,该描述由基于注意力的场景编码器和解码器组成。在场景编码器中,我们研究了输入方式的早期,晚和等级融合的选择。对于每种融合类型,我们通过分解的注意力或潜在的查询关注来探索策略来折衷效率和质量。我们表明,尽管早期融合的结构简单,但不仅是情感不可知论,而且还取得了最先进的结果。
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行为预测在集成自主驾驶软件解决方案中起着重要作用。在行为预测研究中,与单一代理行为预测相比,交互行为预测是一个较小的领域。预测互动剂的运动需要启动新的机制来捕获交互式对的关节行为。在这项工作中,我们将端到端的关节预测问题作为边际学习和车辆行为联合学习的顺序学习过程。我们提出了ProspectNet,这是一个采用加权注意分数的联合学习块,以模拟交互式剂对之间的相互影响。联合学习块首先权衡多模式预测的候选轨迹,然后通过交叉注意更新自我代理的嵌入。此外,我们将每个交互式代理的个人未来预测播放到一个智慧评分模块中,以选择顶部的$ K $预测对。我们表明,ProspectNet优于两个边际预测的笛卡尔产品,并在Waymo交互式运动预测基准上实现了可比的性能。
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预测交通参与者的多模式未来行为对于机器人车辆做出安全决策至关重要。现有作品探索以直接根据潜在特征预测未来的轨迹,或利用密集的目标候选者来识别代理商的目的地,在这种情况下,由于所有运动模式均来自相同的功能,而后者的策略具有效率问题,因此前者策略的收敛缓慢,因为其性能高度依赖关于候选目标的密度。在本文中,我们提出了运动变压器(MTR)框架,该框架将运动预测模拟为全球意图定位和局部运动改进的联合优化。 MTR不使用目标候选者,而是通过采用一系列可学习的运动查询对来结合空间意图。每个运动查询对负责特定运动模式的轨迹预测和完善,这可以稳定训练过程并促进更好的多模式预测。实验表明,MTR在边际和联合运动预测挑战上都达到了最新的性能,在Waymo Open Motion DataSet排行榜上排名第一。代码将在https://github.com/sshaoshuai/mtr上找到。
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轨迹预测和行为决策是自动驾驶汽车的两项重要任务,他们需要对环境环境有良好的了解;通过参考轨迹预测的输出,可以更好地做出行为决策。但是,大多数当前解决方案分别执行这两个任务。因此,提出了结合多个线索的联合神经网络,并将其命名为整体变压器,以预测轨迹并同时做出行为决策。为了更好地探索线索之间的内在关系,网络使用现有知识并采用三种注意力机制:稀疏的多头类型用于减少噪声影响,特征选择稀疏类型,可最佳地使用部分先验知识,并与Sigmoid多头激活类型,用于最佳使用后验知识。与其他轨迹预测模型相比,所提出的模型具有更好的综合性能和良好的解释性。感知噪声稳健性实验表明,所提出的模型具有良好的噪声稳健性。因此,结合多个提示的同时轨迹预测和行为决策可以降低计算成本并增强场景与代理之间的语义关系。
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Motion prediction is highly relevant to the perception of dynamic objects and static map elements in the scenarios of autonomous driving. In this work, we propose PIP, the first end-to-end Transformer-based framework which jointly and interactively performs online mapping, object detection and motion prediction. PIP leverages map queries, agent queries and mode queries to encode the instance-wise information of map elements, agents and motion intentions, respectively. Based on the unified query representation, a differentiable multi-task interaction scheme is proposed to exploit the correlation between perception and prediction. Even without human-annotated HD map or agent's historical tracking trajectory as guidance information, PIP realizes end-to-end multi-agent motion prediction and achieves better performance than tracking-based and HD-map-based methods. PIP provides comprehensive high-level information of the driving scene (vectorized static map and dynamic objects with motion information), and contributes to the downstream planning and control. Code and models will be released for facilitating further research.
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Level 5 Autonomous Driving, a technology that a fully automated vehicle (AV) requires no human intervention, has raised serious concerns on safety and stability before widespread use. The capability of understanding and predicting future motion trajectory of road objects can help AV plan a path that is safe and easy to control. In this paper, we propose a network architecture that parallelizes multiple convolutional neural network backbones and fuses features to make multi-mode trajectory prediction. In the 2020 ICRA Nuscene Prediction challenge, our model ranks 15th on the leaderboard across all teams.
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Making safe and human-like decisions is an essential capability of autonomous driving systems and learning-based behavior planning is a promising pathway toward this objective. Distinguished from existing learning-based methods that directly output decisions, this work introduces a predictive behavior planning framework that learns to predict and evaluate from human driving data. Concretely, a behavior generation module first produces a diverse set of candidate behaviors in the form of trajectory proposals. Then the proposed conditional motion prediction network is employed to forecast other agents' future trajectories conditioned on each trajectory proposal. Given the candidate plans and associated prediction results, we learn a scoring module to evaluate the plans using maximum entropy inverse reinforcement learning (IRL). We conduct comprehensive experiments to validate the proposed framework on a large-scale real-world urban driving dataset. The results reveal that the conditional prediction model is able to forecast multiple possible future trajectories given a candidate behavior and the prediction results are reactive to different plans. Moreover, the IRL-based scoring module can properly evaluate the trajectory proposals and select close-to-human ones. The proposed framework outperforms other baseline methods in terms of similarity to human driving trajectories. Moreover, we find that the conditional prediction model can improve both prediction and planning performance compared to the non-conditional model, and learning the scoring module is critical to correctly evaluating the candidate plans to align with human drivers.
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The task of motion forecasting is critical for self-driving vehicles (SDVs) to be able to plan a safe maneuver. Towards this goal, modern approaches reason about the map, the agents' past trajectories and their interactions in order to produce accurate forecasts. The predominant approach has been to encode the map and other agents in the reference frame of each target agent. However, this approach is computationally expensive for multi-agent prediction as inference needs to be run for each agent. To tackle the scaling challenge, the solution thus far has been to encode all agents and the map in a shared coordinate frame (e.g., the SDV frame). However, this is sample inefficient and vulnerable to domain shift (e.g., when the SDV visits uncommon states). In contrast, in this paper, we propose an efficient shared encoding for all agents and the map without sacrificing accuracy or generalization. Towards this goal, we leverage pair-wise relative positional encodings to represent geometric relationships between the agents and the map elements in a heterogeneous spatial graph. This parameterization allows us to be invariant to scene viewpoint, and save online computation by re-using map embeddings computed offline. Our decoder is also viewpoint agnostic, predicting agent goals on the lane graph to enable diverse and context-aware multimodal prediction. We demonstrate the effectiveness of our approach on the urban Argoverse 2 benchmark as well as a novel highway dataset.
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由于人类行为的瞬极性,预测道路代理的未来轨迹是对自动驾驶的挑战。最近,证明基于目标的多轨道预测方法是有效的,在那里他们首先将过度采样的目标候选者进行得分,然后从它们中选择最终集合。然而,这些方法通常涉及基于稀疏预定锚和启发式目标选择算法的目标预测。在这项工作中,我们提出了一种名为Densetnt的无锚和端到端轨迹预测模型,它直接从密集的目标候选者输出一组轨迹。此外,我们介绍了基于离线优化的技术,为我们的最终在线模型提供多重伪标签。实验表明,Densetnt实现了最先进的性能,在协会运动预测基准中排名第一,并成为2021 Waymo开放数据集运动预测挑战的第一名获胜者。
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仿真是对机器人系统(例如自动驾驶汽车)进行扩展验证和验证的关键。尽管高保真物理和传感器模拟取得了进步,但在模拟道路使用者的现实行为方面仍然存在一个危险的差距。这是因为,与模拟物理和图形不同,设计人类行为的第一个原理模型通常是不可行的。在这项工作中,我们采用了一种数据驱动的方法,并提出了一种可以学会从现实世界驱动日志中产生流量行为的方法。该方法通过将交通仿真问题分解为高级意图推理和低级驾驶行为模仿,通过利用驾驶行为的双层层次结构来实现高样本效率和行为多样性。该方法还结合了一个计划模块,以获得稳定的长马行为。我们从经验上验证了我们的方法,即交通模拟(位)的双层模仿,并具有来自两个大规模驾驶数据集的场景,并表明位表明,在现实主义,多样性和长途稳定性方面可以达到平衡的交通模拟性能。我们还探索了评估行为现实主义的方法,并引入了一套评估指标以进行交通模拟。最后,作为我们的核心贡献的一部分,我们开发和开源一个软件工具,该工具将跨不同驱动数据集的数据格式统一,并将现有数据集将场景转换为交互式仿真环境。有关其他信息和视频,请参见https://sites.google.com/view/nvr-bits2022/home
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