no code implementations • 2 May 2024 • Zixun Jiao, Xihan Wang, Zhaoqiang Xia, Lianhe Shao, Quanli Gao
Reconstructing the hand mesh from one single RGB image is a challenging task because hands are often occluded by other objects.
no code implementations • 13 Sep 2023 • Yang Zheng, Luca Demetrio, Antonio Emanuele Cinà, Xiaoyi Feng, Zhaoqiang Xia, Xiaoyue Jiang, Ambra Demontis, Battista Biggio, Fabio Roli
We empirically show that this defense improves the performances of RGB-D systems against adversarial examples even when they are computed ad-hoc to circumvent this detection mechanism, and that is also more effective than adversarial training.
no code implementations • 26 Aug 2021 • Yang Zheng, Xiaoyi Feng, Zhaoqiang Xia, Xiaoyue Jiang, Ambra Demontis, Maura Pintor, Battista Biggio, Fabio Roli
Adversarial reprogramming allows repurposing a machine-learning model to perform a different task.
1 code implementation • 24 Nov 2020 • Zitong Yu, Xiaobai Li, Jingang Shi, Zhaoqiang Xia, Guoying Zhao
Face anti-spoofing (FAS) plays a vital role in securing face recognition systems from the presentation attacks (PAs).
no code implementations • 30 Jul 2020 • Wei Peng, Jingang Shi, Zhaoqiang Xia, Guoying Zhao
In human action recognition, current works introduce a dynamic graph generation mechanism to better capture the underlying semantic skeleton connections and thus improves the performance.
Ranked #44 on Skeleton Based Action Recognition on NTU RGB+D 120
no code implementations • 17 Jun 2020 • Zhaoqiang Xia, Wei Peng, Huai-Qian Khor, Xiaoyi Feng, Guoying Zhao
In this paper, we analyze the influence of learning complexity, including the input complexity and model complexity, and discover that the lower-resolution input data and shallower-architecture model are helpful to ease the degradation of deep models in composite-database task.
Micro Expression Recognition Micro-Expression Recognition +1
no code implementations • 27 Mar 2019 • Lei Li, Zhaoqiang Xia, Xiaoyue Jiang, Yupeng Ma, Fabio Roli, Xiaoyi Feng
So, we propose a novel detection method for 3D face mask presentation attack by modeling reflectance differences based on intrinsic image analysis.
no code implementations • 15 Jan 2019 • Zhaoqiang Xia, Xiaopeng Hong, Xingyu Gao, Xiaoyi Feng, Guoying Zhao
To exploit the merits of deep learning, we propose a novel deep recurrent convolutional networks based micro-expression recognition approach, capturing the spatial-temporal deformations of micro-expression sequence.
no code implementations • 31 Oct 2018 • Lei Li, Zhaoqiang Xia, Xiaoyue Jiang, Fabio Roli, Xiaoyi Feng
Face presentation attack detection (PAD) has become a thorny problem for biometric systems and numerous countermeasures have been proposed to address it.
Face Presentation Attack Detection Generative Adversarial Network
no code implementations • 31 Jan 2016 • Zhaoqiang Xia, Xiaoyi Feng, Jinye Peng, Abdenour Hadid
Learning based hashing plays a pivotal role in large-scale visual search.