← Search

Wook-Shin Han

12 accepted papers

2026

Bring My Cup! Personalizing Vision-Language-Action Models with Visual Attentive Prompting

ICML 2026poster

While Vision-Language-Action (VLA) models generalize well to generic instructions, they struggle with personalized commands such as "bring *my* cup," where the robot must act on one specific instance among visually similar objects. We study this setting of manipulating personal objects, in which a V…

Cited by 0SourceScholar
2026

Failure is Feedback: History-Aware Backtracking for Agentic Traversal in Multimodal Graphs

ICML 2026poster

Open-domain multimodal document retrieval aims to retrieve specific components (paragraphs, tables, or images) from large and interconnected document corpora. Existing graph-based retrieval approaches typically rely on a uniform similarity metric that overlooks hop-specific semantics, and their rigi…

Cited by 0SourceScholar
2026

SPARTA: Scalable and Principled Benchmark of Tree-Structured Multi-hop QA over Text and Tables

ICLR 2026poster

Real-world Table–Text question answering (QA) tasks require models that can reason across long text and source tables, traversing multiple hops and executing complex operations such as aggregation. Yet existing benchmarks are small, manually curated—and therefore error-prone—and contain shallow ques…

Cited by 0SourcecodeScholar
2025

HELIOS: Harmonizing Early Fusion, Late Fusion, and LLM Reasoning for Multi-Granular Table-Text Retrieval

ACL 2025long

Table-text retrieval aims to retrieve relevant tables and text to support open-domain question answering. Existing studies use either early or late fusion, but face limitations. Early fusion pre-aligns a table row with its associated passages, forming “stars,” which often include irrelevant contexts…

Cited by 4SourcePDFScholar
2025

LILaC: Late Interacting in Layered Component Graph for Open-domain Multimodal Multihop Retrieval

EMNLP 2025

Multimodal document retrieval aims to retrieve query-relevant components from documents composed of textual, tabular, and visual elements. An effective multimodal retriever needs to handle two main challenges: (1) mitigate the effect of irrelevant contents caused by fixed, single-granular retrieval

2025

SAFE: Schema-Driven Approximate Distance Join for Efficient Knowledge Graph Querying

EMNLP 2025

To reduce hallucinations in large language models (LLMs), researchers are increasingly investigating reasoning methods that integrate LLMs with external knowledge graphs (KGs). Existing approaches either map an LLM-generated query graph onto the KG or let the LLM traverse the entire graph; the forme

Cited by 0SourcePDFScholar
2025

TRIAL: Token Relations and Importance Aware Late-interaction for Accurate Text Retrieval

EMNLP 2025

Late-interaction based multi-vector retrieval systems have greatly advanced the field of information retrieval by enabling fast and accurate search over millions of documents. However, these systems rely on a naive summation of token-level similarity scores which often leads to inaccurate relevance

2023

Generalizable Implicit Neural Representations via Instance Pattern Composers

CVPR 2023highlight

Despite recent advances in implicit neural representations (INRs), it remains challenging for a coordinate-based multi-layer perceptron (MLP) of INRs to learn a common representation across data instances and generalize it for unseen instances. In this work, we introduce a simple yet effective frame…

2022

Autoregressive Image Generation Using Residual Quantization

CVPR 2022poster

For autoregressive (AR) modeling of high-resolution images, vector quantization (VQ) represents an image as a sequence of discrete codes. A short sequence length is important for an AR model to reduce its computational costs to consider long-range interactions of codes. However, we postulate that pr…

Cited by 386PDFcodeScholar
2022

Draft-and-Revise: Effective Image Generation with Contextual RQ-Transformer

NeurIPS 2022accept

Although autoregressive models have achieved promising results on image generation, their unidirectional generation process prevents the resultant images from fully reflecting global contexts. To address the issue, we propose an effective image generation framework of \emph{Draft-and-Revise} with \e…

Cited by 27SourcePDFScholar
2021

Regularizing Attention Networks for Anomaly Detection in Visual Question Answering

AAAI 2021technical

For stability and reliability of real-world applications, the robustness of DNNs in unimodal tasks has been evaluated. However, few studies consider abnormal situations that a visual question answering (VQA) model might encounter at test time after deployment in the real-world. In this study, we eva…