Search Results for author: Tianqi Li

Found 8 papers, 4 papers with code

Learning Transferable Negative Prompts for Out-of-Distribution Detection

1 code implementation4 Apr 2024 Tianqi Li, Guansong Pang, Xiao Bai, Wenjun Miao, Jin Zheng

Existing prompt learning methods have shown certain capabilities in Out-of-Distribution (OOD) detection, but the lack of OOD images in the target dataset in their training can lead to mismatches between OOD images and In-Distribution (ID) categories, resulting in a high false positive rate.

Out-of-Distribution Detection Out of Distribution (OOD) Detection

Learning Dynamic Tetrahedra for High-Quality Talking Head Synthesis

1 code implementation27 Feb 2024 ZiCheng Zhang, Ruobing Zheng, Ziwen Liu, Congying Han, Tianqi Li, Meng Wang, Tiande Guo, Jingdong Chen, Bonan Li, Ming Yang

Recent works in implicit representations, such as Neural Radiance Fields (NeRF), have advanced the generation of realistic and animatable head avatars from video sequences.

Out-of-Distribution Detection in Long-Tailed Recognition with Calibrated Outlier Class Learning

1 code implementation17 Dec 2023 Wenjun Miao, Guansong Pang, Tianqi Li, Xiao Bai, Jin Zheng

To this end, we introduce a novel calibrated outlier class learning (COCL) approach, in which 1) a debiased large margin learning method is introduced in the outlier class learning to distinguish OOD samples from both head and tail classes in the representation space and 2) an outlier-class-aware logit calibration method is defined to enhance the long-tailed classification confidence.

Out-of-Distribution Detection

Learning Adversarial Semantic Embeddings for Zero-Shot Recognition in Open Worlds

1 code implementation7 Jul 2023 Tianqi Li, Guansong Pang, Xiao Bai, Jin Zheng, Lei Zhou, Xin Ning

Open-Set Recognition (OSR) is dedicated to addressing the unknown class issue, but existing OSR methods are not designed to model the semantic information of the unseen classes.

Open Set Learning Zero-Shot Learning

Towards Adversarial Robustness via Transductive Learning

no code implementations15 Jun 2021 Jiefeng Chen, Yang Guo, Xi Wu, Tianqi Li, Qicheng Lao, YIngyu Liang, Somesh Jha

Compared to traditional "test-time" defenses, these defense mechanisms "dynamically retrain" the model based on test time input via transductive learning; and theoretically, attacking these defenses boils down to bilevel optimization, which seems to raise the difficulty for adaptive attacks.

Adversarial Robustness Bilevel Optimization +1

Test-Time Adaptation and Adversarial Robustness

no code implementations1 Jan 2021 Xi Wu, Yang Guo, Tianqi Li, Jiefeng Chen, Qicheng Lao, YIngyu Liang, Somesh Jha

On the positive side, we show that, if one is allowed to access the training data, then Domain Adversarial Neural Networks (${\sf DANN}$), an algorithm designed for unsupervised domain adaptation, can provide nontrivial robustness in the test-time maximin threat model against strong transfer attacks and adaptive fixed point attacks.

Adversarial Robustness Test-time Adaptation +1

Improving Multi-Person Pose Estimation using Label Correction

no code implementations8 Nov 2018 Naoki Kato, Tianqi Li, Kohei Nishino, Yusuke Uchida

If a model is trained with data including such missing labels, the output of the model for the location, even though it is correct, is penalized as a false positive, which is likely to cause negative effects on the performance of the model.

Missing Labels Multi-Person Pose Estimation

Full-body High-resolution Anime Generation with Progressive Structure-conditional Generative Adversarial Networks

no code implementations6 Sep 2018 Koichi Hamada, Kentaro Tachibana, Tianqi Li, Hiroto Honda, Yusuke Uchida

Our method tackles the limitations by progressively increasing the resolution of both generated images and structural conditions during training.

Unity Video Generation

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