Cited by 257Emotion and Mood RecognitionFace and Expression RecognitionFace recognition and analysis

Multi-Objective Based Spatio-Temporal Feature Representation Learning Robust to Expression Intensity Variations for Facial Expression Recognition

Kim, Dae Hoe, Baddar, Wissam J., Jang, Jinhyeok, Ro, Yong Man·2019·IEEE Transactions on Affective Computing

Abstract

Facial expression recognition (FER) is increasingly gaining importance in various emerging affective computing applications. In practice, achieving accurate FER is challenging due to the large amount of inter-personal variations such as expression intensity variations. In this paper, we propose a new spatio-temporal feature representation learning for FER that is robust to expression intensity variations. The proposed method utilizes representative expression-states (e.g., onset, apex and offset of expressions) which can be specified in facial sequences regardless of the expression intensity. The characteristics of facial expressions are encoded in two parts in this paper. As the first part, spatial image characteristics of the representative expression-state frames are learned via a convolutional neural network. Five objective terms are proposed to improve the expression class separability of the spatial feature representation. In the second part, temporal characteristics of the spatial feature representation in the first part are learned with a long short-term memory of the facial expression. Comprehensive experiments have been conducted on a deliberate expression dataset (MMI) and a spontaneous micro-expression dataset (CASME II). Experimental results showed that the proposed method achieved higher recognition rates in both datasets compared to the state-of-the-art methods.

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Crossref · 10.1109/taffc.2017.2695999

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Authors
Kim, D. H., Baddar, W. J., Jang, J., & Ro, Y. M.
Affiliations
Korea Advanced Institute of Science and Technology (KR)
Venue
IEEE Transactions on Affective Computing
Published
2019-04-01
Volume
10
Issue
2
Pages
223-236
ISSN
  • 1949-3045 (ISSN-L)
  • 2371-9850
OpenAlex
W2606933083
Cited by
257
References
61
Citations by year
2026: 9 · 2025: 14 · 2024: 33 · 2023: 36 · 2022: 56 · 2021: 39 · 2020: 28 · 2019: 26 · 2018: 13 · 2017: 3
FWCI
24.94
Type
journal article
Language
en
Open access
closed
Locations
  • IEEE Transactions on Affective Computing (publishedVersion)
  • KAIST Institutional Repository (KAIST) (submittedVersion)
Funders
  • National Research Foundation of Korea
  • Korea government (2015R1A2A2A01005724)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Emotion and Mood Recognition
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Face and Expression Recognition
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Face recognition and analysis
Keywords
facial expression recognition, multi-objective learning, long short-term memory, micro-expressions, class separability, affective computing

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