Search Results for author: Tianhong Li

Found 16 papers, 5 papers with code

Leveraging Unpaired Data for Vision-Language Generative Models via Cycle Consistency

no code implementations5 Oct 2023 Tianhong Li, Sangnie Bhardwaj, Yonglong Tian, Han Zhang, Jarred Barber, Dina Katabi, Guillaume Lajoie, Huiwen Chang, Dilip Krishnan

We demonstrate image generation and captioning performance on par with state-of-the-art text-to-image and image-to-text models with orders of magnitude fewer (only 3M) paired image-text data.

Text-to-Image Generation

Unsupervised Learning for Human Sensing Using Radio Signals

no code implementations6 Jul 2022 Tianhong Li, Lijie Fan, Yuan Yuan, Dina Katabi

Thus, in this paper, we explore the feasibility of adapting RGB-based unsupervised representation learning to RF signals.

Action Recognition Contrastive Learning +3

Targeted Supervised Contrastive Learning for Long-Tailed Recognition

1 code implementation CVPR 2022 Tianhong Li, Peng Cao, Yuan Yuan, Lijie Fan, Yuzhe Yang, Rogerio Feris, Piotr Indyk, Dina Katabi

This forces all classes, including minority classes, to maintain a uniform distribution in the feature space, improves class boundaries, and provides better generalization even in the presence of long-tail data.

Contrastive Learning Long-tail Learning

Addressing Feature Suppression in Unsupervised Visual Representations

no code implementations17 Dec 2020 Tianhong Li, Lijie Fan, Yuan Yuan, Hao He, Yonglong Tian, Rogerio Feris, Piotr Indyk, Dina Katabi

However, contrastive learning is susceptible to feature suppression, i. e., it may discard important information relevant to the task of interest, and learn irrelevant features.

Attribute Contrastive Learning +1

In-Home Daily-Life Captioning Using Radio Signals

no code implementations ECCV 2020 Lijie Fan, Tianhong Li, Yuan Yuan, Dina Katabi

This paper aims to caption daily life --i. e., to create a textual description of people's activities and interactions with objects in their homes.

Privacy Preserving Video Captioning

Learning Longterm Representations for Person Re-Identification Using Radio Signals

no code implementations CVPR 2020 Lijie Fan, Tianhong Li, Rongyao Fang, Rumen Hristov, Yuan Yuan, Dina Katabi

RF signals traverse clothes and reflect off the human body; thus they can be used to extract more persistent human-identifying features like body size and shape.

Person Re-Identification Privacy Preserving

Few Sample Knowledge Distillation for Efficient Network Compression

1 code implementation CVPR 2020 Tianhong Li, Jianguo Li, Zhuang Liu, Chang-Shui Zhang

Deep neural network compression techniques such as pruning and weight tensor decomposition usually require fine-tuning to recover the prediction accuracy when the compression ratio is high.

Knowledge Distillation Network Pruning +2

Knowledge Distillation from Few Samples

no code implementations27 Sep 2018 Tianhong Li, Jianguo Li, Zhuang Liu, ChangShui Zhang

Taking the assumption that both "teacher" and "student" have the same feature map sizes at each corresponding block, we add a $1\times 1$ conv-layer at the end of each block in the student-net, and align the block-level outputs between "teacher" and "student" by estimating the parameters of the added layer with limited samples.

Knowledge Distillation

Through-Wall Human Pose Estimation Using Radio Signals

no code implementations CVPR 2018 Ming-Min Zhao, Tianhong Li, Mohammad Abu Alsheikh, Yonglong Tian, Hang Zhao, Antonio Torralba, Dina Katabi

Yet, unlike vision-based pose estimation, the radio-based system can estimate 2D poses through walls despite never trained on such scenarios.

RF-based Pose Estimation

Quadratic Upper Bound for Recursive Teaching Dimension of Finite VC Classes

no code implementations18 Feb 2017 Lunjia Hu, Ruihan Wu, Tianhong Li, Li-Wei Wang

The RTD of a concept class $\mathcal C \subseteq \{0, 1\}^n$, introduced by Zilles et al. (2011), is a combinatorial complexity measure characterized by the worst-case number of examples necessary to identify a concept in $\mathcal C$ according to the recursive teaching model.

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