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Dream to Control: Learning Behaviors by Latent Imagination

2019/12/03 by Danijar Hafner, Hafner, Danijar, Timothy Lillicrap +5 · 2 voices · 187 citations
Computer Science · #Domain Adaptation and Few-Shot Learning #Multimodal Machine Learning Applications #Reinforcement Learning in Robotics #cs.AI #cs.LG #cs.RO

paper · pdf · doi:10.48550/arxiv.1912.01603

arxiv published 2019/12/03 · arxiv updated 2020/03/17

Abstract

Learned world models summarize an agent's experience to facilitate learning complex behaviors. While learning world models from high-dimensional sensory inputs is becoming feasible through deep learning, there are many potential ways for deriving behaviors from them. We present Dreamer, a reinforcement learning agent that solves long-horizon tasks from images purely by latent imagination. We efficiently learn behaviors by propagating analytic gradients of learned state values back through trajectories imagined in the compact state space of a learned world model. On 20 challenging visual control tasks, Dreamer exceeds existing approaches in data-efficiency, computation time, and final performance.

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