Search Results for author: Xuefeng Liu

Found 18 papers, 8 papers with code

Blending Imitation and Reinforcement Learning for Robust Policy Improvement

no code implementations3 Oct 2023 Xuefeng Liu, Takuma Yoneda, Rick L. Stevens, Matthew R. Walter, Yuxin Chen

Integral to RPI are Robust Active Policy Selection (RAPS) and Robust Policy Gradient (RPG), both of which reason over whether to perform state-wise imitation from the oracles or learn from its own value function when the learner's performance surpasses that of the oracles in a specific state.

Imitation Learning reinforcement-learning +1

Bold but Cautious: Unlocking the Potential of Personalized Federated Learning through Cautiously Aggressive Collaboration

1 code implementation ICCV 2023 Xinghao Wu, Xuefeng Liu, Jianwei Niu, Guogang Zhu, Shaojie Tang

The reasoning behind this approach is understandable, as localizing parameters that are easily influenced by non-IID data can prevent the potential negative effect of collaboration.

Personalized Federated Learning

Take Your Pick: Enabling Effective Personalized Federated Learning within Low-dimensional Feature Space

no code implementations26 Jul 2023 Guogang Zhu, Xuefeng Liu, Shaojie Tang, Jianwei Niu, Xinghao Wu, Jiaxing Shen

FedPick achieves PFL in the low-dimensional feature space by selecting task-relevant features adaptively for each client from the features generated by the global encoder based on its local data distribution.

Personalized Federated Learning

3Deformer: A Common Framework for Image-Guided Mesh Deformation

no code implementations19 Jul 2023 Hao Su, Xuefeng Liu, Jianwei Niu, Ji Wan, Xinghao Wu

Unlike these studies, our 3Deformer is a non-training and common framework, which only requires supervision of readily-available semantic images, and is compatible with editing various objects unlimited by datasets.

Active Policy Improvement from Multiple Black-box Oracles

1 code implementation17 Jun 2023 Xuefeng Liu, Takuma Yoneda, Chaoqi Wang, Matthew R. Walter, Yuxin Chen

We introduce MAPS and MAPS-SE, a class of policy improvement algorithms that perform imitation learning from multiple suboptimal oracles.

Imitation Learning Reinforcement Learning (RL)

Unlocking the Potential of Federated Learning for Deeper Models

no code implementations5 Jun 2023 Haolin Wang, Xuefeng Liu, Jianwei Niu, Shaojie Tang, Jiaxing Shen

Our further investigation shows that the decline is due to the continuous accumulation of dissimilarities among client models during the layer-by-layer back-propagation process, which we refer to as "divergence accumulation."

Federated Learning

OpenVIS: Open-vocabulary Video Instance Segmentation

1 code implementation26 May 2023 Pinxue Guo, Tony Huang, Peiyang He, Xuefeng Liu, Tianjun Xiao, Zhaoyu Chen, Wenqiang Zhang

Open-vocabulary Video Instance Segmentation (OpenVIS) can simultaneously detect, segment, and track arbitrary object categories in a video, without being constrained to categories seen during training.

Instance Segmentation Segmentation +2

Cost-Effective Online Contextual Model Selection

no code implementations13 Jul 2022 Xuefeng Liu, Fangfang Xia, Rick L. Stevens, Yuxin Chen

In particular, we focus on the task of selecting pre-trained classifiers, and propose a contextual active model selection algorithm (CAMS), which relies on a novel uncertainty sampling query criterion defined on a given policy class for adaptive model selection.

Model Selection

MARVEL: Raster Manga Vectorization via Primitive-wise Deep Reinforcement Learning

1 code implementation10 Oct 2021 Hao Su, Jianwei Niu, Xuefeng Liu, Jiahe Cui, Ji Wan

Manga is a fashionable Japanese-style comic form that is composed of black-and-white strokes and is generally displayed as raster images on digital devices.

reinforcement-learning Reinforcement Learning (RL) +1

Visformer: The Vision-friendly Transformer

5 code implementations ICCV 2021 Zhengsu Chen, Lingxi Xie, Jianwei Niu, Xuefeng Liu, Longhui Wei, Qi Tian

The past year has witnessed the rapid development of applying the Transformer module to vision problems.

Image Classification

SelectScale: Mining More Patterns from Images via Selective and Soft Dropout

no code implementations30 Nov 2020 Zhengsu Chen, Jianwei Niu, Xuefeng Liu, Shaojie Tang

Instead of randomly dropping units, SelectScale selects the important features in networks and adjusts them during training.

An End-to-end Method for Producing Scanning-robust Stylized QR Codes

no code implementations16 Nov 2020 Hao Su, Jianwei Niu, Xuefeng Liu, Qingfeng Li, Ji Wan, Mingliang Xu, Tao Ren

Quick Response (QR) code is one of the most worldwide used two-dimensional codes.~Traditional QR codes appear as random collections of black-and-white modules that lack visual semantics and aesthetic elements, which inspires the recent works to beautify the appearances of QR codes.

Style Transfer

Targeting SARS-CoV-2 with AI- and HPC-enabled Lead Generation: A First Data Release

1 code implementation28 May 2020 Yadu Babuji, Ben Blaiszik, Tom Brettin, Kyle Chard, Ryan Chard, Austin Clyde, Ian Foster, Zhi Hong, Shantenu Jha, Zhuozhao Li, Xuefeng Liu, Arvind Ramanathan, Yi Ren, Nicholaus Saint, Marcus Schwarting, Rick Stevens, Hubertus van Dam, Rick Wagner

Researchers across the globe are seeking to rapidly repurpose existing drugs or discover new drugs to counter the the novel coronavirus disease (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).

BIG-bench Machine Learning

A Survey on Incorporating Domain Knowledge into Deep Learning for Medical Image Analysis

no code implementations25 Apr 2020 Xiaozheng Xie, Jianwei Niu, Xuefeng Liu, Zhengsu Chen, Shaojie Tang, Shui Yu

Although deep learning models like CNNs have achieved great success in medical image analysis, the small size of medical datasets remains a major bottleneck in this area.

Anomaly Detection Organ Segmentation +1

MangaGAN: Unpaired Photo-to-Manga Translation Based on The Methodology of Manga Drawing

no code implementations22 Apr 2020 Hao Su, Jianwei Niu, Xuefeng Liu, Qingfeng Li, Jiahe Cui, Ji Wan

Manga is a world popular comic form originated in Japan, which typically employs black-and-white stroke lines and geometric exaggeration to describe humans' appearances, poses, and actions.

Generative Adversarial Network Translation

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