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Open Access Article Issue
Deep Reinforcement Learning Object Tracking Based on Actor-Double Critic Network
CAAI Artificial Intelligence Research 2023, 2: 9150013
Published: 30 June 2023
Downloads:201

Aiming at the problem of poor tracking robustness caused by severe occlusion, deformation, and object rotation of deep learning object tracking algorithm in complex scenes, an improved deep reinforcement learning object tracking algorithm based on actor-double critic network is proposed. In offline training phase, the actor network moves the rectangular box representing the object location according to the input sequence image to obtain the action value, that is, the horizontal, vertical, and scale transformation of the object. Then, the designed double critic network is used to evaluate the action value, and the output double Q value is averaged to guide the actor network to optimize the tracking strategy. The design of double critic network effectively improves the stability and convergence, especially in challenging scenes such as object occlusion, and the tracking performance is significantly improved. In online tracking phase, the well-trained actor network is used to infer the changing action of the bounding box, directly causing the tracker to move the box to the object position in the current frame. Several comparative tracking experiments were conducted on the OTB100 visual tracker benchmark and the experimental results show that more intensive reward settings significantly increase the actor network’s output probability of positive actions. This makes the tracking algorithm proposed in this paper outperforms the mainstream deep reinforcement learning tracking algorithms and deep learning tracking algorithms under the challenging attributes such as occlusion, deformation, and rotation.

Open Access Research Article Issue
Algorithm Contest of Calibration-free Motor Imagery BCI in the BCI Controlled Robot Contest in World Robot Contest 2021: A survey
Brain Science Advances 2022, 8 (2): 127-141
Published: 29 June 2022
Downloads:116
Objective:

From September 10 to 13, 2021, the finals of the BCI Controlled Robot Contest in World Robot Contest 2021 were held in Beijing, China. Eleven teams participated in the Algorithm Contest of Calibration-free Motor Imagery BCI. The participants employed both traditional electroencephalograph (EEG) analysis methods and deep learning-based methods in the contest. In this paper, we reviewed the algorithms utilized by the participants, extracted the trends and highlighted interesting approaches from these methods to inform future contests and research recommendations.

Method:

First, we analyzed the algorithms in separate steps, including EEG channel and signal segment setup, prepossessing technology, and classification model. Then, we emphasized the highlights of each algorithm. Finally, we compared the competition algorithm with the SOTA algorithm.

Results:

The algorithm employed in the finals performed better than that of the SOTA algorithm. During the final stage of the contest, four of the top five teams used convolutional neural network models, suggesting that with the rapid development of deep learning, convolutional neural network-based models have been the most popular methods in the field of motor imagery BCI.

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