Search Results for author: Tianyi Wang

Found 31 papers, 10 papers with code

Snapshot Reinforcement Learning: Leveraging Prior Trajectories for Efficiency

1 code implementation1 Mar 2024 Yanxiao Zhao, Yangge Qian, Tianyi Wang, Jingyang Shan, Xiaolin Qin

Deep reinforcement learning (DRL) algorithms require substantial samples and computational resources to achieve higher performance, which restricts their practical application and poses challenges for further development.

reinforcement-learning

Diffusion Facial Forgery Detection

1 code implementation29 Jan 2024 Harry Cheng, Yangyang Guo, Tianyi Wang, Liqiang Nie, Mohan Kankanhalli

In particular, this dataset leverages 30, 000 carefully collected textual and visual prompts, ensuring the synthesis of images with both high fidelity and semantic consistency.

Image Generation

Robust Identity Perceptual Watermark Against Deepfake Face Swapping

no code implementations2 Nov 2023 Tianyi Wang, Mengxiao Huang, Harry Cheng, Bin Ma, Yinglong Wang

Falsification and source tracing are accomplished by justifying the consistency between the content-matched identity perceptual watermark and the recovered robust watermark from the image.

Face Swapping

CTP-Net: Character Texture Perception Network for Document Image Forgery Localization

no code implementations4 Aug 2023 Xin Liao, Siliang Chen, Jiaxin Chen, Tianyi Wang, Xiehua Li

We design a Character Texture Stream (CTS) based on optical character recognition to capture features of text areas that are essential components of a document image.

Image Forensics Optical Character Recognition

Towards Generalizable Deepfake Detection by Primary Region Regularization

no code implementations24 Jul 2023 Harry Cheng, Yangyang Guo, Tianyi Wang, Liqiang Nie, Mohan Kankanhalli

The existing deepfake detection methods have reached a bottleneck in generalizing to unseen forgeries and manipulation approaches.

DeepFake Detection Face Swapping

A Dual-level Detection Method for Video Copy Detection

1 code implementation21 May 2023 Tianyi Wang, Feipeng Ma, Zhenhua Liu, Fengyun Rao

With the development of multimedia technology, Video Copy Detection has been a crucial problem for social media platforms.

Copy Detection Partial Video Copy Detection +2

XAIR: A Framework of Explainable AI in Augmented Reality

no code implementations28 Mar 2023 Xuhai Xu, Mengjie Yu, Tanya R. Jonker, Kashyap Todi, Feiyu Lu, Xun Qian, João Marcelo Evangelista Belo, Tianyi Wang, Michelle Li, Aran Mun, Te-Yen Wu, Junxiao Shen, Ting Zhang, Narine Kokhlikyan, Fulton Wang, Paul Sorenson, Sophie Kahyun Kim, Hrvoje Benko

The framework was based on a multi-disciplinary literature review of XAI and HCI research, a large-scale survey probing 500+ end-users' preferences for AR-based explanations, and three workshops with 12 experts collecting their insights about XAI design in AR.

Explainable Artificial Intelligence (XAI)

Recursive deep learning framework for forecasting the decadal world economic outlook

1 code implementation25 Jan 2023 Tianyi Wang, Rodney Beard, John Hawkins, Rohitash Chandra

Due to the diversity and complexity of the world economy, a wide range of models have been used, but there are challenges in making decadal GDP forecasts given unexpected changes such as pandemics and wars.

Temporal Sequences Time Series +1

Metalearning generalizable dynamics from trajectories

no code implementations3 Jan 2023 Qiaofeng Li, Tianyi Wang, Vwani Roychowdhury, M. Khalid Jawed

We present the interpretable meta neural ordinary differential equation (iMODE) method to rapidly learn generalizable (i. e., not parameter-specific) dynamics from trajectories of multiple dynamical systems that vary in their physical parameters.

Inductive Bias Meta-Learning

Deepfake Detection: A Comprehensive Study from the Reliability Perspective

no code implementations20 Nov 2022 Tianyi Wang, Xin Liao, Kam Pui Chow, Xiaodong Lin, Yinglong Wang

In this survey, we provide a thorough review of the existing Deepfake detection studies from the reliability perspective.

DeepFake Detection Face Swapping

Deep Convolutional Pooling Transformer for Deepfake Detection

no code implementations12 Sep 2022 Tianyi Wang, Harry Cheng, Kam Pui Chow, Liqiang Nie

Most existing deep learning methods mainly focus on local features and relations within the face image using convolutional neural networks as a backbone.

DeepFake Detection Face Swapping +1

Computer Vision for Volunteer Cotton Detection in a Corn Field with UAS Remote Sensing Imagery and Spot Spray Applications

no code implementations15 Jul 2022 Pappu Kumar Yadav, J. Alex Thomasson, Stephen W. Searcy, Robert G. Hardin, Ulisses Braga-Neto, Sorin C. Popescu, Daniel E. Martin, Roberto Rodriguez, Karem Meza, Juan Enciso, Jorge Solorzano Diaz, Tianyi Wang

To control boll weevil (Anthonomus grandis L.) pest re-infestation in cotton fields, the current practices of volunteer cotton (VC) (Gossypium hirsutum L.) plant detection in fields of rotation crops like corn (Zea mays L.) and sorghum (Sorghum bicolor L.) involve manual field scouting at the edges of fields.

Management

Detecting Volunteer Cotton Plants in a Corn Field with Deep Learning on UAV Remote-Sensing Imagery

no code implementations14 Jul 2022 Pappu Kumar Yadav, J. Alex Thomasson, Robert Hardin, Stephen W. Searcy, Ulisses Braga-Neto, Sorin C. Popescu, Daniel E. Martin, Roberto Rodriguez, Karem Meza, Juan Enciso, Jorge Solorzano Diaz, Tianyi Wang

The two-fold objectives of this paper were : (i) to determine whether YOLOv3 can be used for VC detection in a corn field using RGB (red, green, and blue) aerial images collected by UAS and (ii) to investigate the behavior of YOLOv3 on images at three different scales (320 x 320, S1; 416 x 416, S2; and 512 x 512, S3 pixels) based on average precision (AP), mean average precision (mAP) and F1-score at 95% confidence level.

PVT-COV19D: Pyramid Vision Transformer for COVID-19 Diagnosis

no code implementations30 Jun 2022 Lilang Zheng, Jiaxuan Fang, Xiaorun Tang, Hanzhang Li, Jiaxin Fan, Tianyi Wang, Rui Zhou, Zhaoyan Yan

A large number of experiments on the COV19-CT-DB dataset demonstrate the effectiveness of the proposed method.

COVID-19 Diagnosis

Diverse Imitation Learning via Self-Organizing Generative Models

no code implementations6 May 2022 Arash Vahabpour, Tianyi Wang, QIUJING LU, Omead Pooladzandi, Vwani Roychowdhury

Imitation learning is the task of replicating expert policy from demonstrations, without access to a reward function.

Imitation Learning

HIT-UAV: A high-altitude infrared thermal dataset for Unmanned Aerial Vehicle-based object detection

1 code implementation7 Apr 2022 Jiashun Suo, Tianyi Wang, Xingzhou Zhang, Haiyang Chen, Wei Zhou, Weisong Shi

We present the HIT-UAV dataset, a high-altitude infrared thermal dataset for object detection applications on Unmanned Aerial Vehicles (UAVs).

Object object-detection +1

Which side are you on? Insider-Outsider classification in conspiracy-theoretic social media

no code implementations ACL 2022 Pavan Holur, Tianyi Wang, Shadi Shahsavari, Timothy Tangherlini, Vwani Roychowdhury

In these, an outside group threatens the integrity of an inside group, leading to the emergence of sharply defined group identities: Insiders -- agents with whom the authors identify and Outsiders -- agents who threaten the insiders.

Language Modelling

Voice-Face Homogeneity Tells Deepfake

no code implementations4 Mar 2022 Harry Cheng, Yangyang Guo, Tianyi Wang, Qi Li, Xiaojun Chang, Liqiang Nie

To this end, a voice-face matching method is devised to measure the matching degree of these two.

Realized GARCH, CBOE VIX, and the Volatility Risk Premium

no code implementations10 Dec 2021 Peter Reinhard Hansen, Zhuo Huang, Chen Tong, Tianyi Wang

The volatility shock endows the exponentially affine SDF with a compensation for volatility risk.

Diverse Imitation Learning via Self-OrganizingGenerative Models

no code implementations29 Sep 2021 Arash Vahabpour, QIUJING LU, Tianyi Wang, Omead Pooladzandi, Vwani Roychowhury

To address this problem, we introduce a novel generative model for behavior cloning, in a mode-separating manner.

Imitation Learning

An Underwater Image Semantic Segmentation Method Focusing on Boundaries and a Real Underwater Scene Semantic Segmentation Dataset

2 code implementations26 Aug 2021 Zhiwei Ma, Haojie Li, Zhihui Wang, Dan Yu, Tianyi Wang, Yingshuang Gu, Xin Fan, Zhongxuan Luo

Based on this dataset, we propose a semi-supervised underwater semantic segmentation network focusing on the boundaries(US-Net: Underwater Segmentation Network).

Boundary Detection Instance Segmentation +7

RepSum: Unsupervised Dialogue Summarization based on Replacement Strategy

no code implementations ACL 2021 Xiyan Fu, Yating Zhang, Tianyi Wang, Xiaozhong Liu, Changlong Sun, Zhenglu Yang

In the field of dialogue summarization, due to the lack of training data, it is often difficult for supervised summary generation methods to learn vital information from dialogue context with limited data.

Dialogue Generation Sentence +1

Hierarchically Modeling Micro and Macro Behaviors via Multi-Task Learning for Conversion Rate Prediction

no code implementations20 Apr 2021 Hong Wen, Jing Zhang, Fuyu Lv, Wentian Bao, Tianyi Wang, Zulong Chen

Motivated by this observation, we propose a novel \emph{CVR} prediction method by Hierarchically Modeling both Micro and Macro behaviors ($HM^3$).

Multi-Task Learning Selection bias

Liquidation, Leverage and Optimal Margin in Bitcoin Futures Markets

no code implementations9 Feb 2021 Zhiyong Cheng, Jun Deng, Tianyi Wang, Mei Yu

Using the generalized extreme value theory to characterize tail distributions, we address liquidation, leverage, and optimal margins for bitcoin long and short futures positions.

Accuracy and Resiliency of Analog Compute-in-Memory Inference Engines

no code implementations5 Aug 2020 Zhe Wan, Tianyi Wang, Yiming Zhou, Subramanian S. Iyer, Vwani P. Roychowdhury

To explore this critical issue of scalability, this paper first presents a simulation framework to evaluate the feasibility of large-scale DNNs based on CIM architecture and analog NVM.

Masking Orchestration: Multi-task Pretraining for Multi-role Dialogue Representation Learning

2 code implementations27 Feb 2020 Tianyi Wang, Yating Zhang, Xiaozhong Liu, Changlong Sun, Qiong Zhang

Multi-role dialogue understanding comprises a wide range of diverse tasks such as question answering, act classification, dialogue summarization etc.

Dialogue Understanding Question Answering +1

Store Location Selection via Mining Search Query Logs of Baidu Maps

no code implementations12 Jun 2016 Mengwen Xu, Tianyi Wang, Zhengwei Wu, Jingbo Zhou, Jian Li, Haishan Wu

In this paper, we propose a Demand Distribution Driven Store Placement (D3SP) framework for business store placement by mining search query data from Baidu Maps.

Clustering

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