Learning by Watching

• URL: http://arxiv.org/abs/2106.05966v1
• Date: Thu, 10 Jun 2021 17:58:34 GMT
• Title: Learning by Watching
• Authors: Jimuyang Zhang and Eshed Ohn-Bar
• Abstract summary: Learning by Watching (LbW) enables learning a driving policy without requiring full knowledge of neither the state nor expert actions. LbW makes use of the demonstrations of other vehicles in a given scene by transforming the ego-vehicle's observations to their points of view. Our LbW agent learns more robust driving policies while enabling data-efficient learning, including quick adaptation of the policy to rare and novel scenarios.
• Score: 7.785051236155595
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: When in a new situation or geographical location, human drivers have an extraordinary ability to watch others and learn maneuvers that they themselves may have never performed. In contrast, existing techniques for learning to drive preclude such a possibility as they assume direct access to an instrumented ego-vehicle with fully known observations and expert driver actions. However, such measurements cannot be directly accessed for the non-ego vehicles when learning by watching others. Therefore, in an application where data is regarded as a highly valuable asset, current approaches completely discard the vast portion of the training data that can be potentially obtained through indirect observation of surrounding vehicles. Motivated by this key insight, we propose the Learning by Watching (LbW) framework which enables learning a driving policy without requiring full knowledge of neither the state nor expert actions. To increase its data, i.e., with new perspectives and maneuvers, LbW makes use of the demonstrations of other vehicles in a given scene by (1) transforming the ego-vehicle's observations to their points of view, and (2) inferring their expert actions. Our LbW agent learns more robust driving policies while enabling data-efficient learning, including quick adaptation of the policy to rare and novel scenarios. In particular, LbW drives robustly even with a fraction of available driving data required by existing methods, achieving an average success rate of 92% on the original CARLA benchmark with only 30 minutes of total driving data and 82% with only 10 minutes.

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