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arXiv 2602.08006cs.CVcs.AIcs.LGcs.RO

ForecastOcc: 基于视觉的语义占用预测

ForecastOcc: Vision-based Semantic Occupancy Forecasting

Department of Computer Science, University of Freiburg(计算机科学系,弗赖堡大学)

Riya Mohan, Juana Valeria Hurtado, Rohit Mohan, Abhinav Valada

AI总结:

ForecastOcc 是首个基于视觉的语义占用预测框架,通过联合预测未来占用状态和语义类别,提升自动驾驶环境感知能力。

摘要:

自动驾驶需要随时间推移预测几何和语义信息,以有效推断未来环境状态。现有的基于视觉的占用预测方法主要关注与运动相关的类别,如静态和动态物体,而语义信息仍然很少。最近的语义占用预测方法弥补了这一差距,但依赖于从独立网络获得的过去占用预测。这使得当前方法对误差积累敏感,并且阻止了直接从图像中学习时空特征。在本工作中,我们提出了ForecastOcc,这是首个基于视觉的语义占用预测框架,能够联合预测未来的占用状态和语义类别。我们的框架能够从过去的摄像机图像中直接生成多时间尺度的语义占用预测,而无需依赖外部估计的地图。我们在两个互补的设置中评估ForecastOcc:在Occ3D-nuScenes数据集上的多视角预测和在SemanticKITTI上的单目预测,其中我们建立了该任务的第一个基准。我们介绍了首个基线,通过在我们的框架内调整两个2D预测模块来实现。重要的是,我们提出了一种新的架构,该架构结合了时间跨注意力预测模块、2D到3D视图转换器、用于占用预测的3D编码器以及用于多时间尺度 voxel 级预测的语义占用头。在两个数据集上的大量实验表明,ForecastOcc在多个时间尺度上始终优于基线,产生具有丰富语义、未来感知的预测,能够捕捉场景动态和语义,这对于自动驾驶至关重要。

英文摘要:

Autonomous driving requires forecasting both geometry and semantics over time to effectively reason about future environment states. Existing vision-based occupancy forecasting methods focus on motion-related categories such as static and dynamic objects, while semantic information remains largely absent. Recent semantic occupancy forecasting approaches address this gap but rely on past occupancy predictions obtained from separate networks. This makes current methods sensitive to error accumulation and prevents learning spatio-temporal features directly from images. In this work, we present ForecastOcc, the first framework for vision-based semantic occupancy forecasting that jointly predicts future occupancy states and semantic categories. Our framework yields semantic occupancy forecasts for multiple horizons directly from past camera images, without relying on externally estimated maps. We evaluate ForecastOcc in two complementary settings: multi-view forecasting on the Occ3D-nuScenes dataset and monocular forecasting on SemanticKITTI, where we establish the first benchmark for this task. We introduce the first baselines by adapting two 2D forecasting modules within our framework. Importantly, we propose a novel architecture that incorporates a temporal cross-attention forecasting module, a 2D-to-3D view transformer, a 3D encoder for occupancy prediction, and a semantic occupancy head for voxel-level forecasts across multiple horizons. Extensive experiments on both datasets show that ForecastOcc consistently outperforms baselines, yielding semantically rich, future-aware predictions that capture scene dynamics and semantics critical for autonomous driving.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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