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arXiv 2308.04589cs.CVcs.AI
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Temporal DINO:一种增强动作预测的自监督视频策略

Temporal DINO: A Self-supervised Video Strategy to Enhance Action Prediction

Oxford Brookes University(牛津布鲁克斯大学);Indian Institute of Technology, Bombay(印度理工学院孟买分校)

Izzeddin Teeti, Rongali Sai Bhargav, Vivek Singh, Andrew Bradley, Biplab Banerjee, Fabio Cuzzolin

AI总结:

本文提出受 DINO 启发的自监督 Temporal-DINO 视频策略,通过教师向仅见过去帧的学生传递未来上下文,在 ROAD 上跨 3D-ResNet、Transformer 和 LSTM 平均提升动作预测精确率 9.9 PP。

摘要:

新兴的动作预测领域在自动驾驶、活动分析和人机交互等各种计算机视觉应用中发挥着关键作用。尽管已取得显著进展,但由于视频数据固有的高维度、复杂动态和不确定性,准确预测未来动作仍然是一个具有挑战性的问题。传统监督方法需要大量标注数据,而获取这些数据成本高昂且耗时。本文受 DINO(无标签自蒸馏)启发,提出了一种用于增强动作预测的新型自监督视频策略。Temporal-DINO 方法采用两个模型:一个处理过去帧的“学生”模型,以及一个同时处理过去帧和未来帧、从而获得更广泛时间上下文的“教师”模型。在训练期间,教师指导学生仅通过观察过去帧来学习未来上下文。该策略在 ROAD 数据集上针对动作预测下游任务进行评估,使用了 3D-ResNet、Transformer 和 LSTM 架构。实验结果表明,这些架构的预测性能均有显著提升,本方法平均实现了 9.9 个精确率百分点(PP)的增强,凸显了其在提升骨干网络捕获长期依赖关系能力方面的有效性。此外,本方法在预训练数据集规模和所需训练轮数方面表现出高效率。该方法克服了其他方法存在的局限,包括考虑多种骨干架构、处理多个预测时域、减少对手工增强的依赖,以及将预训练流程简化为单一阶段。这些发现凸显了本方法在活动识别、运动规划和场景理解等多种基于视频的任务中的潜力。

英文摘要:

The emerging field of action prediction plays a vital role in various computer vision applications such as autonomous driving, activity analysis and human-computer interaction. Despite significant advancements, accurately predicting future actions remains a challenging problem due to high dimensionality, complex dynamics and uncertainties inherent in video data. Traditional supervised approaches require large amounts of labelled data, which is expensive and time-consuming to obtain. This paper introduces a novel self-supervised video strategy for enhancing action prediction inspired by DINO (self-distillation with no labels). The Temporal-DINO approach employs two models; a 'student' processing past frames; and a 'teacher' processing both past and future frames, enabling a broader temporal context. During training, the teacher guides the student to learn future context by only observing past frames. The strategy is evaluated on ROAD dataset for the action prediction downstream task using 3D-ResNet, Transformer, and LSTM architectures. The experimental results showcase significant improvements in prediction performance across these architectures, with our method achieving an average enhancement of 9.9% Precision Points (PP), highlighting its effectiveness in enhancing the backbones' capabilities of capturing long-term dependencies. Furthermore, our approach demonstrates efficiency regarding the pretraining dataset size and the number of epochs required. This method overcomes limitations present in other approaches, including considering various backbone architectures, addressing multiple prediction horizons, reducing reliance on hand-crafted augmentations, and streamlining the pretraining process into a single stage. These findings highlight the potential of our approach in diverse video-based tasks such as activity recognition, motion planning, and scene understanding.

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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