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arXiv 2109.14718cs.RO
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通过动作为谓词奠定基础

Grounding Predicates through Actions

Stanford University(斯坦福大学)

Toki Migimatsu, Jeannette Bohg

摘要:

代表抽象状态的符号,如“洗碗机里的盘子”或“桌子上的杯子”,通过隐藏高层规划不必要的细节,使机器人能够进行长期推理。当前用于学习识别视觉数据中的符号状态的方法需要大量的标记的训练数据,但是由于图像中谓词的组合数量,手动注释这样的数据集是非常昂贵的。我们提出了一种新的方法,通过利用已知的前,后条件的行动自动标记符号状态在大规模的视频活动数据集。这种自动标记方案只需要以动作标签的形式进行弱监督,该动作标签描述了每个视频中演示的动作。我们使用我们的框架,训练谓词分类识别对象之间的符号关系时,提示与对象边界框,并证明这样的谓词分类器可以匹配的性能训练与充分的监督在一小部分的标签成本。我们还将我们的框架应用于现有的大规模人类活动数据集,并展示了这些在人类数据上训练的谓词分类器在现实世界中实现闭环任务规划的能力。

英文摘要:

Symbols representing abstract states such as "dish in dishwasher" or "cup on table" allow robots to reason over long horizons by hiding details unnecessary for high-level planning. Current methods for learning to identify symbolic states in visual data require large amounts of labeled training data, but manually annotating such datasets is prohibitively expensive due to the combinatorial number of predicates in images. We propose a novel method for automatically labeling symbolic states in large-scale video activity datasets by exploiting known pre- and post-conditions of actions. This automatic labeling scheme only requires weak supervision in the form of an action label that describes which action is demonstrated in each video. We use our framework to train predicate classifiers to identify symbolic relationships between objects when prompted with object bounding boxes, and demonstrate that such predicate classifiers can match the performance of those trained with full supervision at a fraction of the labeling cost. We also apply our framework to an existing large-scale human activity dataset, and demonstrate the ability of these predicate classifiers trained on human data to enable closed-loop task planning in the real world.

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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