Xin Liu

Affective Computing and Machine Perception

Dr. Xin LIU

Xin Liu


Senior researcher

40 peer reviewed publications in international journals. The publications have been cited 800 times, of which the most cited publication accounts for 161 citations. The author has a h-index of 16.00. (Google Scholar)


Dr. Xin LIU is currently an Academy of Finland postdoc fellow and a senior researcher working at CMVS group. He received his Ph.D. degrees in Computer Science from University of Oulu, Finland and in Information and Communication Engineering from Xi'an Jiaotong University, China, in 2019 and 2016 respectively. 

His current research focus on machine learning and computer vision for human behavior analysis (body gestures, actions, facial expression), object detection (foreground segmentation, saliency detection), and image restoration (denoising, deblurring, super-resolution), etc. He has authored or co-authored more than 30 papers in journals and conferences, and has served as a reviewer for 20 conferences and journals, such as the PAMI and IJCV.

Research interests

  • Human behavior understanding
  • Affective computing
  • Object detection
  • Emotion AI


Xin Liu has been awarded and funded by the Finnish Foundation for Technology Promotion (TES)Nokia FoundationKAUTE FoundationOtto A. Malm FoundationTauno Tonning Foundation, and Riitta Ja Jorma J. Takanen Foundation for his research excellence on computer vision and artificial intelligence. 


Scientific merits

Professional and community activities

  • Member of IEEE
  • Reviewer of IJCV
  • Reviewer of IEEE T-PAMI, IP, NNLS, CSVT, CI
  • Reviewer of ACM TOMM, PR

Selected publications

  • Liu, Xin; Shi, Henglin; Hong, Xiaopeng; Chen, Haoyu; Tao, Dacheng; Zhao, Guoying (2020) 3D Skeletal Gesture Recognition via Hidden States Exploration. - IEEE transactions on image processing 29, 4583-4597 . [Original] [Self-archived]
  • Liu, Xin; Zhao, Guoying; Yao, Jiawen; Qi, Chun (2015) Background Subtraction Based on Low-Rank and Structured Sparse Decomposition. - IEEE transactions on image processing 24 (8), 2502-2514
  • Liu, Xin; Yao, Jiawen; Hong, Xiaopeng; Huang, Xiaohua; Zhou, Ziheng; Qi, Chun; Zhao, Guoying (2018) Background Subtraction using Spatio-Temporal Group Sparsity Recovery. - IEEE Transactions on Circuits ansd Systems for Video Technology pp (99), 1-1 . [Original]
  • Liu, X.; Shi, H.; Hong, X.; Chen, H.; Tao, D.; Zhao, G. (2019) Hidden states exploration for 3D skeleton-based gesture recognition. (Artikkeli tieteellisessä konferenssijulkaisussa). - 19th IEEE Winter Conference on Applications of Computer Vision, WACV 2019. IEEE Winter Conference on Applications of Computer Vision. 1846-1855, 8659023. [Original] [Self-archived]
  • Liu, X.; Zhao, G. (2019) 3D Skeletal Gesture Recognition via Sparse Coding of Time-Warping Invariant Riemannian Trajectories. (Artikkeli tieteellisessä konferenssijulkaisussa). - MultiMedia Modeling. MMM 2019.. Kompatsiaris I.; Vrochidis S.; Mezaris V.; Cheng W.; Huet B.; Gurrin C.. Lecture notes in computer science 11295. 678-690. [Original] [Self-archived]
  • Shi, Jingang; Liu, Xin; Zong, Yuan; Qi, Chun; Zhao, Guoying (2018) Hallucinating Face Image by Regularization Models in High-Resolution Feature Space. - IEEE transactions on image processing 27 (6), 2980-2995 . [Original]
  • Shi, Henglin; Liu, Xin; Hong, Xiaopeng; Zhao, Guoying (2019) Bidirectional Long Short-Term Memory Variational Autoencoder. (Artikkeli ammatillisessa konferenssijulkaisussa). - Proceedings of the British Machine Vision Conference 2018 (BMVC). 3rd - 6th September, Newcastle UK. Ei sarjaa/No series. 1-11. [Original] [Self-archived]
  • Chen, Haoyu; Liu, Xin; Zhao,Guoying (2018) Temporal Hierarchical Dictionary with HMM for Fast Gesture Recognition. (Artikkeli tieteellisessä konferenssijulkaisussa). - 2018 24th International Conference on Pattern Recognition (ICPR). International Conference on Pattern Recognition. 3378-3383. [Original]
  • Li, Yibao; Lan, Shouren; Liu, Xin; Lu, Bingheng; Wang, Lisheng (2020) An efficient volume repairing method by using a modified Allen-Cahn equation. - Pattern recognition 107 (November 2020), 107478 . [Original]
  • Huang, Xiaohua; Wang, Su-jing; Liu, Xin; Zhao, Guoying; Feng, Xiaoyi; Pietikäinen, Matti (2018) Discriminative spatiotemporal local binary pattern with revisited integral projection for spontaneous facial micro-expression recognition. - IEEE Transactions on Affective Computing early access, early access . [Original]
  • Xu, Yingyue; Hong, Xiaopeng; Porikli, Fatih; Liu, Xin; Chen, Jie; Zhao, Guoying (2019) Saliency Integration: An Arbitrator Model. - IEEE transactions on multimedia 21 (1), 98-113 . [Original] [Self-archived]
  • Zha, Zhiyuan; Liu, Xin; Huang, Xiaohua; Shi, Henglin; Xu, Yingyue; Wang, Qiong; Tang, Lan; Zhang, Xinggan (2017) Analyzing the group sparsity based on the rank minimization methods. (Artikkeli tieteellisessä konferenssijulkaisussa). - 2017 IEEE International Conference on Multimedia and Expo (ICME). Proceedings (IEEE International Conference on Multimedia and Expo). 883-888. [Original] [Self-archived]
  • Zha, Zhiyuan; Liu, Xin; Zhou,Ziheng; Huang, Xiaohua; Shi, Jingang; Shang, Zhenhong; Tang, Lan; Bai, Yechao; Wang, Qiong; Zhang,Xinggan (2017) Image denoising via group sparsity residual constraint. (Artikkeli tieteellisessä konferenssijulkaisussa). - 2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing. 1787-1791. [Original] [Self-archived]
  • Zha, Zhiyuan; Zhang, Xinggan; Wu, Yu; Wang, Qiong; Liu, Xin; Tang, Lan; Yuan, Xin (2018) Non-convex weighted ℓp nuclear norm based ADMM framework for image restoration. - Neurocomputing 311, 209-224 . [Original] [Self-archived]
  • Zha, Zhiyuan; Zhang, Xinggan; Wang, Qiong; Tang, Lan; Liu, Xin (2018) Group-based sparse representation for image compressive sensing reconstruction with non-convex regularization. - Neurocomputing 296, 55-63 . [Original] [Self-archived]

Research visits

  • The University of Sydney
    14.8.2017 to 14.2.2018

    Winner of the Endeavour Research Fellowship by Australian Government Department of Education and Training which supported Dr. Xin Liu as a Endeavour researcher visited  the University of Sydney, Australia, worked with Professor Dacheng Tao.

  • Imperial College London
    20.3.2019 to 10.8.2019

    Professor Stefanos Zafeiriou