Search Results for author: Liangchen Liu

Found 15 papers, 1 papers with code

Data-induced multiscale losses and efficient multirate gradient descent schemes

no code implementations5 Feb 2024 Juncai He, Liangchen Liu, Yen-Hsi Richard Tsai

This paper investigates the impact of multiscale data on machine learning algorithms, particularly in the context of deep learning.

Point Deformable Network with Enhanced Normal Embedding for Point Cloud Analysis

no code implementations20 Dec 2023 Xingyilang Yin, Xi Yang, Liangchen Liu, Nannan Wang, Xinbo Gao

Additional offsets and modulation scalars are learned on the whole point features, which shift the deformable reference points to the regions of interest.

Automated Measurement of Pericoronary Adipose Tissue Attenuation and Volume in CT Angiography

no code implementations22 Nov 2023 Andrew M. Nguyen, Tejas Sudharshan Mathai, Liangchen Liu, Jianfei Liu, Ronald M. Summers

In this pilot work, we developed a fully automated approach for the measurement of PCAT mean attenuation and volume in the region around both coronary arteries.

Gradient constrained sharpness-aware prompt learning for vision-language models

no code implementations14 Sep 2023 Liangchen Liu, Nannan Wang, Dawei Zhou, Xinbo Gao, Decheng Liu, Xi Yang, Tongliang Liu

This paper targets a novel trade-off problem in generalizable prompt learning for vision-language models (VLM), i. e., improving the performance on unseen classes while maintaining the performance on seen classes.

Expert Uncertainty and Severity Aware Chest X-Ray Classification by Multi-Relationship Graph Learning

no code implementations6 Sep 2023 Mengliang Zhang, Xinyue Hu, Lin Gu, Liangchen Liu, Kazuma Kobayashi, Tatsuya Harada, Ronald M. Summers, Yingying Zhu

In this paper, we re-extract disease labels from CXR reports to make them more realistic by considering disease severity and uncertainty in classification.

Graph Learning

Linear Regression on Manifold Structured Data: the Impact of Extrinsic Geometry on Solutions

no code implementations5 Jul 2023 Liangchen Liu, Juncai He, Richard Tsai

We assume that the data manifold is smooth and is embedded in a Euclidean space, and our objective is to reveal the impact of the data manifold's extrinsic geometry on the regression.

regression

Unified Multi-View Orthonormal Non-Negative Graph Based Clustering Framework

no code implementations3 Nov 2022 Liangchen Liu, Qiuhong Ke, Chaojie Li, Feiping Nie, Yingying Zhu

In this paper, we formulate a novel clustering model, which exploits the non-negative feature property and, more importantly, incorporates the multi-view information into a unified joint learning framework: the unified multi-view orthonormal non-negative graph based clustering framework (Umv-ONGC).

Clustering

Memory Efficient Temporal & Visual Graph Model for Unsupervised Video Domain Adaptation

no code implementations13 Aug 2022 Xinyue Hu, Lin Gu, Liangchen Liu, Ruijiang Li, Chang Su, Tatsuya Harada, Yingying Zhu

Existing video domain adaption (DA) methods need to store all temporal combinations of video frames or pair the source and target videos, which are memory cost expensive and can't scale up to long videos.

Domain Adaptation Graph Attention

Nearest Neighbor Sampling of Point Sets using Rays

no code implementations25 Nov 2019 Liangchen Liu, Louis Ly, Colin Macdonald, Yen-Hsi Richard Tsai

We propose a new framework for the sampling, compression, and analysis of distributions of point sets and other geometric objects embedded in Euclidean spaces.

DBRec: Dual-Bridging Recommendation via Discovering Latent Groups

no code implementations27 Sep 2019 Jingwei Ma, Jiahui Wen, Mingyang Zhong, Liangchen Liu, Chaojie Li, Weitong Chen, Yin Yang, Honghui Tu, Xue Li

In addition, we propose to jointly learn user-user group (item-item group) hierarchies, so that we can effectively discover latent groups and learn compact user/item representations.

Collaborative Filtering Recommendation Systems

What is the Best Way for Extracting Meaningful Attributes from Pictures?

no code implementations17 Oct 2016 Liangchen Liu, Arnold Wiliem, Shaokang Chen, Brian C. Lovell

With this metric, automatic quantitative evaluation can be performed on the attribute sets; thus, reducing the enormous effort to perform manual evaluation.

Attribute

Determining the best attributes for surveillance video keywords generation

no code implementations21 Feb 2016 Liangchen Liu, Arnold Wiliem, Shaokang Chen, Kun Zhao, Brian C. Lovell

In this paper, we propose a novel approach, based on the shared structure exhibited amongst meaningful attributes, that enables us to compare between different automatic attribute discovery approaches. We then validate our approach by comparing various attribute discovery methods such as PiCoDeS on two attribute datasets.

Attribute

Automatic and Quantitative evaluation of attribute discovery methods

no code implementations5 Feb 2016 Liangchen Liu, Arnold Wiliem, Shaokang Chen, Brian C. Lovell

In our evaluation, we gleaned some insights that could be beneficial in developing automatic attribute discovery methods to generate meaningful attributes.

Attribute Image Classification

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