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Geewook Kim

14 accepted papers

2026

State-Space Hierarchical Compression with Gated Attention and Learnable Sampling for Hour-Long Video Understanding in Large Multimodal Models

AAAI 2026technical

We propose an efficient framework to compress massive video-frame features before feeding them into large multimodal models, thereby mitigating the severe token explosion arising from hour-long videos. Our design leverages a bidirectional state-space model equipped with a gated skip connection and a

Cited by 0SourcePDFScholar
2025

How Does Vision-Language Adaptation Impact the Safety of Vision Language Models?

ICLR 2025poster

Vision-Language adaptation (VL adaptation) transforms Large Language Models (LLMs) into Large Vision-Language Models (LVLMs) for multimodal tasks, but this process often compromises the inherent safety capabilities embedded in the original LLMs. Despite potential harmfulness due to weakened safety m…

Cited by 1SourcePDFScholar
2025

MMRefine: Unveiling the Obstacles to Robust Refinement in Multimodal Large Language Models

ACL 2025finding

This paper introduces MMRefine, a MultiModal Refinement benchmark designed to evaluate the error refinement capabilities of Multimodal Large Language Models (MLLMs). As the emphasis shifts toward enhancing reasoning during inference, MMRefine provides a framework that evaluates MLLMs’ abilities to d…

2024

On Efficient Language and Vision Assistants for Visually-Situated Natural Language Understanding: What Matters in Reading and Reasoning

EMNLP 2024main

Recent advancements in language and vision assistants have showcased impressive capabilities but suffer from a lack of transparency, limiting broader research and reproducibility. While open-source models handle general image tasks effectively, they face challenges with the high computational demand…

2024

Prometheus-Vision: Vision-Language Model as a Judge for Fine-Grained Evaluation

ACL 2024findings

Assessing long-form responses generated by Vision-Language Models (VLMs) is challenging. It not only requires checking whether the VLM follows the given instruction but also verifying whether the text output is properly grounded on the given image. Inspired by the recent approach of evaluating LMs w…

2023

SCOB: Universal Text Understanding via Character-wise Supervised Contrastive Learning with Online Text Rendering for Bridging Domain Gap

ICCV 2023poster

Inspired by the great success of language model (LM)-based pre-training, recent studies in visual document understanding have explored LM-based pre-training methods for modeling text within document images. Among them, pre-training that reads all text from an image has shown promise, but often exhib…

Cited by 2PDFcodeScholar
2023

Visually-Situated Natural Language Understanding with Contrastive Reading Model and Frozen Large Language Models

EMNLP 2023long main

Recent advances in Large Language Models (LLMs) have stimulated a surge of research aimed at extending their applications to the visual domain. While these models exhibit promise in generating abstract image captions and facilitating natural conversations, their performance on text-rich images still…

Cited by 0SourcecodeScholar
2022

OCR-Free Document Understanding Transformer

ECCV 2022poster

"Understanding document images (e.g., invoices) is a core but challenging task since it requires complex functions such as reading text and a holistic understanding of the document. Current Visual Document Understanding (VDU) methods outsource the task of reading text to off-the-shelf Optical Charac…

2021

Cost-effective End-to-end Information Extraction for Semi-structured Document Images

EMNLP 2021main

A real-world information extraction (IE) system for semi-structured document images often involves a long pipeline of multiple modules, whose complexity dramatically increases its development and maintenance cost. One can instead consider an end-to-end model that directly maps the input to the targe…

2020

Scale down Transformer by Grouping Features for a Lightweight Character-level Language Model

COLING 2020main

This paper introduces a method that efficiently reduces the computational cost and parameter size of Transformer. The proposed model, refer to as Group-Transformer, splits feature space into multiple groups, factorizes the calculation paths, and reduces computations for the group interaction. Extens…

2019

Graph Embedding with Shifted Inner Product Similarity and Its Improved Approximation Capability

AISTATS 2019poster

We propose shifted inner-product similarity (SIPS), which is a novel yet very simple extension of the ordinary inner-product similarity (IPS) for neural-network based graph embedding (GE). In contrast to IPS, that is limited to approximating positive-definite (PD) similarities, SIPS goes beyond the…

Cited by 12SourcePDFScholar
2019

What Is Wrong With Scene Text Recognition Model Comparisons? Dataset and Model Analysis

ICCV 2019oral

Many new proposals for scene text recognition (STR) models have been introduced in recent years. While each claim to have pushed the boundary of the technology, a holistic and fair comparison has been largely missing in the field due to the inconsistent choices of training and evaluation datasets. T…

Cited by 729PDFcodeScholar