Xin Liu

Associate Professor (Tenure Track)

Computational Engineering

LUT School of Engineering Sciences

Lappeenranta

Xin.Liu@lut.fi

+358 41 476 4800

Research areas

Artificial Intelligence

Signal Processing

Computer Vision and Pattern Recognition

Social Psychology

Biography

Xin Liu is an Associate Professor of Computer Science at Lappeenranta-Lahti University of Technology LUT, Finland. He received his Ph.D. degree in Computer Science from University of Oulu, Finland in 2019, and Ph.D. degree in Information and Communication Engineering from Xi'an Jiaotong University, China in 2016. He was an Academy of Finland postdoc fellow. Dr. Liu was a senior researcher worked with Professor Guoying Zhao and Professor Matti Pietikainen at CMVS group at University of Oulu, Finland. From August 2017 to February 2018, he was a visiting researcher at the University of Sydney, Australia, worked with Professor Dacheng Tao. From March to August 2019, he worked with Professor Stefanos Zafeiriou at the Imperial College London, United Kingdom. Xin has been awarded and funded by the Academy of Finland, Finnish Foundation for Technology Promotion (TES), Nokia Foundation, KAUTE Foundation, Otto A. Malm Foundation, Tauno Tonning Foundation, and Riitta Ja Jorma J. Takanen Foundation for his research excellence on computer vision and artificial intelligence. He was the winner of the Endeavour Research Fellowship by Australian Government Department of Education and Training.

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 40 papers in journals and conferences.

Selected Publications:

1. Xin Liu, Henglin Shi, Haoyu Chen, Zitong Yu, Xiaobai Li, Guoying Zhao, “iMiGUE: An Identity-free Video Dataset for Micro-Gesture Understanding and Emotion Analysis”, IEEE Conference on Computer Vision and Pattern Recognition (CVPR), pp. 10631-10642, 2021
2. Xin Liu, Guoying Zhao. “3D Skeletal Gesture Recognition via Discriminative Coding on Time-Warping Invariant Riemannian Trajectories”, IEEE Transactions on Multimedia, vol 23, pp. 1841 - 1854, 2021.
3. Zitong Yu, Benjia Zhou, Jun Wan, Pichao Wang, Haoyu Chen, Xin Liu, Stan Z. Li, and Guoying Zhao. "Searching multi-rate and multi-modal temporal enhanced networks for gesture recognition." IEEE Transactions on Image Processing, vol 30, pp. 5626 - 5640, 2021.
4. Xin Liu, Henglin Shi, Xiaopeng Hong, Haoyu Chen, Dacheng Tao, Guoying Zhao, “3D Skeletal Gesture Recognition via Hidden States Exploration”, IEEE Transactions on Image Processing, Vol. 29, pp. 4583–4597, 2020.
5. Haoyu Chen, Xin Liu, Jingang Shi, Guoying Zhao. “Temporal hierarchical dictionary guided decoding for online gesture segmentation and recognition”, IEEE Transactions on Image Processing, vol. 29, pp. 9689–9702, 2020.
6. Yibao Li, Shouren Lan, Xin Liu, Bingheng Lu, Lisheng Wang. “Improving boundary repairing using a modified Allen-Cahn equation”, Pattern Recognition, vol. 107, 107478, 2020.
7. Xiaohua Huang, Sujing Wang, Xin Liu, Guoying Zhao, Xiaoyi Feng, Matti Pietikainen. “Discriminative Spatiotemporal Local Binary Pattern with Revisited Integral Projection for Spontaneous Facial Micro-Expression Recognition”, IEEE Transactions on Affective Computing, Vol. 10, Issue. 1, pp. 32-47, 2019.
8. Yingyue Xu, Xiaopeng Hong, Fatih Porikli, Xin Liu, Jie Chen, Guoying Zhao. “Saliency Integration: An Arbitrator Model”, IEEE Transactions on Multimedia, Vol. 21, Issue 1, pp. 98 - 113, 2019.
9. Xin Liu, Henglin Shi, Xiaopeng Hong, Haoyu Chen, Dacheng Tao, Guoying Zhao. "Hidden states exploration for 3D skeleton-based gesture recognition." In 2019 IEEE Winter Conference on Applications of Computer Vision (WACV), pp. 1846-1855. IEEE, 2019.
10. Xin Liu, Jiawen Yao, Xiaopeng Hong, Xiaohua Huang, Ziheng Zhou, Chun Qi, Guoying Zhao. “Background Subtraction using Spatio-Temporal Group Sparsity Recovery”, IEEE Transactions on Circuits and Systems for Video Technology, Vol. 28, Issue 8, pp. 1737 - 1751, 2018.
11. Jingang Shi, Xin Liu, Yuan Zong, Chun Qi, Guoying Zhao.“Hallucinating Face Image by Regularization Models in High-Resolution Feature Space”, IEEE Transactions on Image Processing, Vol. 27, Issue 6, pp. 2980 - 2995, 2018.
12. Xin Liu, Guoying Zhao, Jiawen Yao, Chun Qi. “Background Subtraction Based on Low-rank and Structured Sparse Decomposition”, IEEE Transactions on Image Processing, Vol. 24, Issue 8, pp. 2502 - 2514, 2015.

Dr. Liu has served as a reviewer for 40 conferences and journals:

IEEE Transactions on Pattern Analysis and Machine Intelligence, International Journal of Computer Vision, IEEE Transactions on Image Processing, IEEE Transactions on Neural Networks and Learning Systems, IEEE Transactions on Artificial Intelligence, IEEE Transactions on Circuits and Systems for Video Technology, IEEE Transactions on Computational Imaging, IEEE Transactions on Computational Social Systems, ACM Transactions on Multimedia Computing, Communications, and Applications, Pattern Recognition, Signal Processing