Subject-Independent Brain-Computer Interface for Decoding High-Level Visual Imagery Tasks

Dae Hyeok Lee, Dong Kyun Han, Sung Jin Kim, Ji Hoon Jeong, Seong Whan Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


Brain-computer interface (BCI) is used for communication between humans and devices by recognizing humans' status and intention. Communication between humans and a drone using electroencephalogram (EEG) signals is one of the most challenging issues in the BCI domain. In particular, the control of drone swarms (the direction and formation) has more advantages compared to the control of a drone. The visual imagery (VI) paradigm is that subjects visually imagine specific objects or scenes. Reduction of the variability among subjects' EEG signals is essential for practical BCI-based systems. In this study, we proposed the subepoch-wise feature encoder (SEFE) to improve the performances in the subject-independent tasks by using the VI dataset. This study is the first attempt to demonstrate the possibility of generalization among subjects in the VI-based BCI. We used the leave-one-subject-out cross-validation for evaluating the performances. We obtained higher performances when including our proposed module than excluding our proposed module. The DeepConvNet with SEFE showed the highest performance of 0.72 among six different decoding models. Hence, we demonstrated the feasibility of decoding the VI dataset in the subject-independent task with robust performances by using our proposed module.

Original languageEnglish
Title of host publication2021 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781665442077
Publication statusPublished - 2021
Event2021 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2021 - Melbourne, Australia
Duration: 2021 Oct 172021 Oct 20

Publication series

NameConference Proceedings - IEEE International Conference on Systems, Man and Cybernetics
ISSN (Print)1062-922X


Conference2021 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2021

Bibliographical note

Funding Information:
*This research was supported by the Defense Challengeable Future Technology Program of Agency for Defense Development, Republic of Korea.

Publisher Copyright:
© 2021 IEEE.


  • Brain-computer interface (BCI)
  • Deep convolutional neural network
  • Electroencephalogram (EEG)
  • Subject-independent task
  • Visual imagery (VI)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Human-Computer Interaction


Dive into the research topics of 'Subject-Independent Brain-Computer Interface for Decoding High-Level Visual Imagery Tasks'. Together they form a unique fingerprint.

Cite this