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Kwan Ho Ryan Chan

12 accepted papers

2026

REALISTA: Realistic Latent Adversarial Attacks that Elicit LLM Hallucinations

ICML 2026poster

Large language models (LLMs) achieve strong performance across many tasks but remain vulnerable to hallucinations, motivating the need to find adversarial prompts that realistically elicit such failures. We formulate hallucination elicitation as a constrained optimization problem, where the goal is …

Cited by 0SourceScholar
2025

Concept Lancet: Image Editing with Compositional Representation Transplant

CVPR 2025poster

Diffusion models are widely used for image editing tasks. Existing editing methods often design a representation manipulation procedure by curating an edit direction in the text embedding or score space. However, such a procedure faces a key challenge: overestimating the edit strength harms visual c…

Cited by 0SourcePDFScholar
2025

Conformal Information Pursuit for Interactively Guiding Large Language Models

NeurIPS 2025poster

A significant use case of instruction-finetuned Large Language Models (LLMs) is to solve question-answering tasks interactively. In this setting, an LLM agent is tasked with making a prediction by sequentially querying relevant information from the user, as opposed to a single-turn conversation. Thi…

Cited by 0SourceScholar
2025

Do LLMs ``know'' internally when they follow instructions?

ICLR 2025poster

Instruction-following is crucial for building AI agents with large language models (LLMs), as these models must adhere strictly to user-provided constraints and guidelines. However, LLMs often fail to follow even simple and clear instructions. To improve instruction-following behavior and prevent u…

2025

Learning Interpretable Queries for Explainable Image Classification with Information Pursuit

ICCV 2025poster

Information Pursuit (IP) is a recently introduced learning framework to construct classifiers that are interpretable-by-design. Given a set of task-relevant and interpretable data queries, IP selects a small subset of the most informative queries and makes predictions based on the gathered query-ans…

Cited by 0SourcePDFScholar
2025

SECA: Semantically Equivalent and Coherent Attacks for Eliciting LLM Hallucinations

NeurIPS 2025poster

Large Language Models (LLMs) are increasingly deployed in high-risk domains. However, state-of-the-art LLMs often produce hallucinations, raising serious concerns about their reliability. Prior work has explored adversarial attacks for hallucination elicitation in LLMs, but it often produces unreali…

Cited by 0SourcecodeScholar
2024

Bootstrapping Variational Information Pursuit with Large Language and Vision Models for Interpretable Image Classification

ICLR 2024poster

Variational Information Pursuit (V-IP) is an interpretable-by-design framework that makes predictions by sequentially selecting a short chain of user-defined, interpretable queries about the data that are most informative for the task. The prediction is based solely on the obtained query answers, wh…

2024

PaCE: Parsimonious Concept Engineering for Large Language Models

NeurIPS 2024poster

Large Language Models (LLMs) are being used for a wide variety of tasks. While they are capable of generating human-like responses, they can also produce undesirable output including potentially harmful information, racist or sexist language, and hallucinations. Alignment methods are designed to red…

2023

Unsupervised Manifold Linearizing and Clustering

ICCV 2023poster

We consider the problem of simultaneously clustering and learning a linear representation of data lying close to a union of low-dimensional manifolds, a fundamental task in machine learning and computer vision. When the manifolds are assumed to be linear subspaces, this reduces to the classical prob…

Cited by 14PDFcodeScholar
2023

Variational Information Pursuit for Interpretable Predictions

ICLR 2023poster

There is a growing interest in the machine learning community in developing predictive algorithms that are interpretable by design. To this end, recent work proposes to sequentially ask interpretable queries about data until a high confidence prediction can be made based on the answers obtained (the…

2022

Efficient Maximal Coding Rate Reduction by Variational Forms

CVPR 2022poster

The principle of Maximal Coding Rate Reduction (MCR2) has recently been proposed as a training objective for learning discriminative low-dimensional structures intrinsic to high-dimensional data to allow for more robust training than standard approaches, such as cross-entropy minimization. However,…

Cited by 11PDFScholar
2020

Learning Diverse and Discriminative Representations via the Principle of Maximal Coding Rate Reduction

NeurIPS 2020poster

To learn intrinsic low-dimensional structures from high-dimensional data that most discriminate between classes, we propose the principle of {\em Maximal Coding Rate Reduction} ($\text{MCR}^2$), an information-theoretic measure that maximizes the coding rate difference between the whole dataset and…