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Junxi Chen

8 accepted papers

2026

Joint Learning of General and Diverse Patterns with Mixture of Memory Experts for Weakly-Supervised Video Anomaly Detection

CVPR 2026

Weakly-supervised Video Anomaly Detection (wVAD) aims to detect abnormal events using only binary labels, making it challenging to capture both the diversity of anomalies and their shared semantic cues. Existing methods either focus on a generic anomaly pattern, achieving strong generalization but w

Cited by 0SourceScholar
2025

Generalizing Single-Frame Supervision to Event-Level Understanding for Video Anomaly Detection

NeurIPS 2025poster

Video Anomaly Detection (VAD) aims to identify abnormal frames from discrete events within video sequences. Existing VAD methods suffer from heavy annotation burdens in fully-supervised paradigm, insensitivity to subtle anomalies in semi-supervised paradigm, and vulnerability to noise in weakly-supe…

Cited by 0SourceScholar
2025

Mind the Trojan Horse: Image Prompt Adapter Enabling Scalable and Deceptive Jailbreaking

CVPR 2025highlight

Recently, the Image Prompt Adapter (IP-Adapter) has been increasingly integrated into text-to-image diffusion models (T2I-DMs) to improve controllability. However, in this paper, we reveal that T2I-DMs equipped with the IP-Adapter (T2I-IP-DMs) enable a new jailbreak attack named the hijacking attack…

2024

Adversarially Robust Distillation by Reducing the Student-Teacher Variance Gap

ECCV 2024poster

"Adversarial robustness generally relies on large-scale architectures and datasets, hindering resource-efficient deployment. For scalable solutions, adversarially robust knowledge distillation has emerged as a principle strategy, facilitating the transfer of robustness from a large-scale teacher mod…

Cited by 2SourcePDFScholar
2024

Adversarially Robust Few-shot Learning via Parameter Co-distillation of Similarity and Class Concept Learners

CVPR 2024poster

Few-shot learning (FSL) facilitates a variety of computer vision tasks yet remains vulnerable to adversarial attacks. Existing adversarially robust FSL methods rely on either visual similarity learning or class concept learning. Our analysis reveals that these two learning paradigms are complementar…

Cited by 3SourcePDFScholar
2024

Prompt-Enhanced Multiple Instance Learning for Weakly Supervised Video Anomaly Detection

CVPR 2024poster

Weakly-supervised Video Anomaly Detection (wVAD) aims to detect frame-level anomalies using only video-level labels in training. Due to the limitation of coarse-grained labels Multi-Instance Learning (MIL) is prevailing in wVAD. However MIL suffers from insufficiency of binary supervision to model d…

2024

Robust Distillation via Untargeted and Targeted Intermediate Adversarial Samples

CVPR 2024poster

Adversarially robust knowledge distillation aims to compress large-scale models into lightweight models while preserving adversarial robustness and natural performance on a given dataset. Existing methods typically align probability distributions of natural and adversarial samples between teacher an…

Cited by 5SourcePDFScholar