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Yuchen Yuan

8 accepted papers

2026

Metis: Learning to Jailbreak LLMs via Self-Evolving Metacognitive Policy Optimization

ICML 2026poster

Red teaming is critical for uncovering vulnerabilities in Large Language Models (LLMs). While automated methods have improved scalability, existing approaches often rely on static heuristics or stochastic search, rendering them brittle against advanced safety alignment. To address this, we introduce…

Cited by 0SourceScholar
2026

OrthAlign: Orthogonal Subspace Decomposition for Non-Interfering Multi-Objective Alignment

ICLR 2026poster

Large language model (LLM) alignment faces a critical dilemma when addressing multiple human preferences: improvements in one dimension frequently come at the expense of others, creating unavoidable trade-offs between competing objectives like helpfulness and harmlessness. While prior work mainly fo…

Cited by 0SourcecodeScholar
2026

When Safe Unimodal Inputs Collide: Optimizing Reasoning Chains for Cross-Modal Safety in Multimodal Large Language Models

AAAI 2026technical

Multimodal Large Language Models (MLLMs) are susceptible to the implicit reasoning risk, wherein innocuous unimodal inputs synergistically assemble into risky multimodal data that produce harmful outputs. We attribute this vulnerability to the difficulty of MLLMs maintaining safety alignment through

Cited by 0SourcePDFScholar
2019

Perspective-Guided Convolution Networks for Crowd Counting

ICCV 2019poster

In this paper, we propose a novel perspective-guided convolution (PGC) for convolutional neural network (CNN) based crowd counting (i.e. PGCNet), which aims to overcome the dramatic intra-scene scale variations of people due to the perspective effect. While most state-of-the-arts adopt multi-scale o…

Cited by 245PDFcodeScholar
2019

Recognizing Part Attributes With Insufficient Data

ICCV 2019poster

Recognizing the attributes of objects and their parts is central to many computer vision applications. Although great progress has been made to apply object-level recognition, recognizing the attributes of parts remains less applicable since the training data for part attributes recognition is usual…

Cited by 22PDFcodeScholar
2018

Compact Generalized Non-local Network

NeurIPS 2018poster

The non-local module is designed for capturing long-range spatio-temporal dependencies in images and videos. Although having shown excellent performance, it lacks the mechanism to model the interactions between positions across channels, which are of vital importance in recognizing fine-grained obje…

2018

Multi-Attention Multi-Class Constraint for Fine-grained Image Recognition

ECCV 2018poster

Attention-based learning for fine-grained image recognition remains a challenging task, where most of the existing methods treat each object part in isolation, while neglecting the correlations among them. In addition, the multi-stage or multi-scale mechanisms involved make the existing methods less…

Cited by 501SourcePDFScholar
2015

Robust Saliency Detection via Regularized Random Walks Ranking

CVPR 2015poster

In the field of saliency detection, many graph-based algorithms heavily depend on the accuracy of the pre-processed superpixel segmentation, which leads to significant sacrifice of detail information from the input image. In this paper, we propose a novel bottom-up saliency detection approach that t…

Cited by 279SourcePDFScholar