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Chengwei Chen

5 accepted papers

2024

Prompt Gradient Projection for Continual Learning

ICLR 2024spotlight

Prompt-tuning has demonstrated impressive performance in continual learning by querying relevant prompts for each input instance, which can avoid the introduction of task identifier. Its forgetting is therefore reduced as this instance-wise query mechanism enables us to select and update only releva…

2024

PromptAD: Learning Prompts with only Normal Samples for Few-Shot Anomaly Detection

CVPR 2024poster

The vision-language model has brought great improvement to few-shot industrial anomaly detection which usually needs to design of hundreds of prompts through prompt engineering. For automated scenarios we first use conventional prompt learning with many-class paradigm as the baseline to automaticall…

2022

Comprehensive Regularization in a Bi-directional Predictive Network for Video Anomaly Detection

AAAI 2022technical

Video anomaly detection aims to automatically identify unusual objects or behaviours by learning from normal videos. Previous methods tend to use simplistic reconstruction or prediction constraints, which leads to the insufficiency of learned representations for normal data. As such, we propose a no…

Cited by 79SourcePDFScholar
2021

Novelty Detection via Contrastive Learning with Negative Data Augmentation

IJCAI 2021poster

Novelty detection is the process of determining whether a query example differs from the learned training distribution. Previous generative adversarial networks based methods and self-supervised approaches suffer from instability training, mode dropping, and low discriminative ability. We overcome s…

Cited by 17SourcePDFScholar
2020

Latent Regularized Generative Dual Adversarial Network For Abnormal Detection

IJCAI 2020poster

With the development of adversarial attack in deep learning, it is critical for abnormal detector to not only discover the out-of-distribution samples but also provide defence against the adversarial attacker. Since few previous universal detector is known to work well on both tasks, we consider aga…

Cited by 0SourcePDFScholar