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Jang, Seongwon, Hyemi Jeong, and Hyunseok Yang. 2023. "MURM: Utilization of Multi-Views for Goal-Conditioned Reinforcement Learning in Robotic Manipulation" Robotics 12, no. 4: 119. https://doi.org/10.3390/robotics12040119

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Jang, S.; Jeong, H.; Yang, H. MURM: Utilization of Multi-Views for Goal-Conditioned Reinforcement Learning in Robotic Manipulation. Robotics 2023, 12, 119. https://doi.org/10.3390/robotics12040119

Jang S, Jeong H, Yang H. MURM: Utilization of Multi-Views for Goal-Conditioned Reinforcement Learning in Robotic Manipulation. Robotics. 2023; 12(4):119. https://doi.org/10.3390/robotics12040119

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Abstract: We present a novel framework, multi-view unified reinforcement learning for robotic manipulation (MURM), which efficiently utilizes multiple camera views to train a goal-conditioned policy for a robot to perform complex tasks. The MURM framework consists of three main phases: (i) demo collection from an expert, (ii) representation learning, and (iii) offline reinforcement learning. In the demo collection phase, we design a scripted expert policy that uses privileged information, such as Cartesian coordinates of a target and goal, to solve the tasks. We add noise to the expert policy to provide sufficient interactive information about the environment, as well as suboptimal behavioral trajectories. We designed three tasks in a Pybullet simulation environment, including placing an object in a desired goal position and picking up various objects that are randomly positioned in the environment. In the representation learning phase, we use a vector-quantized variational autoencoder (VQVAE) to learn a more structured latent representation that makes it feasible to train for RL compared to high-dimensional raw images. We train VQVAE models for each distinct camera view and define the best viewpoint settings for training. In the offline reinforcement learning phase, we use the Implicit Q-learning (IQL) algorithm as our baseline and introduce a separated Q-functions method and dropout method that can be implemented in multi-view settings to train the goal-conditioned policy with supervised goal images. We conduct experiments in simulation and show that the single-view baseline fails to solve complex tasks, whereas MURM is successful. Keywords: goal-conditioned reinforcement learning (GCRL); multiple camera views; robot manipulation; vector-quantized variational autoencoders (VQVAE)

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Jang S, Jeong H, Yang H. MURM: Utilization of Multi-Views for Goal-Conditioned Reinforcement Learning in Robotic Manipulation. Robotics. 2023; 12(4):119. https://doi.org/10.3390/robotics12040119

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Jang, S.; Jeong, H.; Yang, H. MURM: Utilization of Multi-Views for Goal-Conditioned Reinforcement Learning in Robotic Manipulation. Robotics 2023, 12, 119. https://doi.org/10.3390/robotics12040119

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