Search Results for author: Yiwei Lu

Found 13 papers, 5 papers with code

Disguised Copyright Infringement of Latent Diffusion Models

no code implementations10 Apr 2024 Yiwei Lu, Matthew Y. R. Yang, Zuoqiu Liu, Gautam Kamath, YaoLiang Yu

Copyright infringement may occur when a generative model produces samples substantially similar to some copyrighted data that it had access to during the training phase.

Indiscriminate Data Poisoning Attacks on Pre-trained Feature Extractors

no code implementations20 Feb 2024 Yiwei Lu, Matthew Y. R. Yang, Gautam Kamath, YaoLiang Yu

In this paper, we extend the exploration of the threat of indiscriminate attacks on downstream tasks that apply pre-trained feature extractors.

Data Poisoning Domain Adaptation +2

$f$-MICL: Understanding and Generalizing InfoNCE-based Contrastive Learning

no code implementations15 Feb 2024 Yiwei Lu, Guojun Zhang, Sun Sun, Hongyu Guo, YaoLiang Yu

In self-supervised contrastive learning, a widely-adopted objective function is InfoNCE, which uses the heuristic cosine similarity for the representation comparison, and is closely related to maximizing the Kullback-Leibler (KL)-based mutual information.

Contrastive Learning

Exploring the Limits of Model-Targeted Indiscriminate Data Poisoning Attacks

1 code implementation7 Mar 2023 Yiwei Lu, Gautam Kamath, YaoLiang Yu

Building on existing parameter corruption attacks and refining the Gradient Canceling attack, we perform extensive experiments to confirm our theoretical findings, test the predictability of our transition threshold, and significantly improve existing indiscriminate data poisoning baselines over a range of datasets and models.

Data Poisoning Model Poisoning

An Argumentation-Based Legal Reasoning Approach for DL-Ontology

no code implementations7 Sep 2022 Zhe Yu, Yiwei Lu

Ontology is a popular method for knowledge representation in different domains, including the legal domain, and description logics (DL) is commonly used as its description language.

Autonomous Vehicles Legal Reasoning

Indiscriminate Data Poisoning Attacks on Neural Networks

1 code implementation19 Apr 2022 Yiwei Lu, Gautam Kamath, YaoLiang Yu

Data poisoning attacks, in which a malicious adversary aims to influence a model by injecting "poisoned" data into the training process, have attracted significant recent attention.

Data Poisoning

$f$-Mutual Information Contrastive Learning

no code implementations29 Sep 2021 Guojun Zhang, Yiwei Lu, Sun Sun, Hongyu Guo, YaoLiang Yu

Self-supervised contrastive learning is an emerging field due to its power in providing good data representations.

Contrastive Learning

AdaCrowd: Unlabeled Scene Adaptation for Crowd Counting

1 code implementation23 Oct 2020 Mahesh Kumar Krishna Reddy, Mrigank Rochan, Yiwei Lu, Yang Wang

In particular, we propose a new problem called unlabeled scene-adaptive crowd counting.

Crowd Counting

Few-shot Scene-adaptive Anomaly Detection

1 code implementation ECCV 2020 Yiwei Lu, Frank Yu, Mahesh Kumar Krishna Reddy, Yang Wang

In this paper, we propose a novel few-shot scene-adaptive anomaly detection problem to address the limitations of previous approaches.

Anomaly Detection Meta-Learning

Structure Learning with Similarity Preserving

no code implementations3 Dec 2019 Zhao Kang, Xiao Lu, Yiwei Lu, Chong Peng, Zenglin Xu

Leveraging on the underlying low-dimensional structure of data, low-rank and sparse modeling approaches have achieved great success in a wide range of applications.

Clustering

Future Frame Prediction Using Convolutional VRNN for Anomaly Detection

no code implementations5 Sep 2019 Yiwei Lu, Mahesh Kumar Krishna Reddy, Seyed shahabeddin Nabavi, Yang Wang

Anomaly detection in videos aims at reporting anything that does not conform the normal behaviour or distribution.

Anomaly Detection

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