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Sungrae Park

11 accepted papers

2026

Bounded Hyperbolic Tangent: A Stable and Efficient Alternative to Pre-Layer Normalization in Large Language Models

ICML 2026poster

Pre-Layer Normalization (Pre-LN) is the de facto choice for large language models (LLMs) and is crucial for stable pretraining and effective transfer learning. However, Pre-LN is inefficient due to repeated statistical calculations and suffers from the curse of depth. As layers grow, the magnitude a…

Cited by 0SourceScholar
2025

ZERA: Zero-init Instruction Evolving Refinement Agent – From Zero Instructions to Structured Prompts via Principle-based Optimization

EMNLP 2025

Automatic Prompt Optimization (APO) improves large language model (LLM) performance by refining prompts for specific tasks. However, prior APO methods typically focus only on user prompts, rely on unstructured feedback, and require large sample sizes and long iteration cycles—making them costly and

2024

SRFormer: Text Detection Transformer with Incorporated Segmentation and Regression

AAAI 2024technical

Existing techniques for text detection can be broadly classified into two primary groups: segmentation-based and regression-based methods. Segmentation models offer enhanced robustness to font variations but require intricate post-processing, leading to high computational overhead. Regression-based…

2022

BROS: A Pre-trained Language Model Focusing on Text and Layout for Better Key Information Extraction from Documents

AAAI 2022technical

Key information extraction (KIE) from document images requires understanding the contextual and spatial semantics of texts in two-dimensional (2D) space. Many recent studies try to solve the task by developing pre-trained language models focusing on combining visual features from document images wit…

2022

Domain Generalization by Mutual-Information Regularization with Pre-trained Models

ECCV 2022poster

"Domain generalization (DG) aims to learn a generalized model to an unseen target domain using only limited source domains. Previous attempts to DG fail to learn domain-invariant representations only from the source domains due to the significant domain shifts between training and test domains. Inst…

2022

Multi-modal Text Recognition Networks: Interactive Enhancements between Visual and Semantic Features

ECCV 2022poster

"Linguistic knowledge has brought great benefits to scene text recognition by providing semantics to refine character sequences. However, since linguistic knowledge has been applied individually on the output sequence, previous methods have not fully utilized the semantics to understand visual clues…

2021

SWAD: Domain Generalization by Seeking Flat Minima

NeurIPS 2021poster

Domain generalization (DG) methods aim to achieve generalizability to an unseen target domain by using only training data from the source domains. Although a variety of DG methods have been proposed, a recent study shows that under a fair evaluation protocol, called DomainBed, the simple empirical r…

2021

Show, Attend and Distill: Knowledge Distillation via Attention-based Feature Matching

AAAI 2021technical

Knowledge distillation extracts general knowledge from a pretrained teacher network and provides guidance to a target student network. Most studies manually tie intermediate features of the teacher and student, and transfer knowledge through predefined links. However, manual selection often construc…

2020

Character Region Attention For Text Spotting

ECCV 2020poster

A scene text spotter is composed of text detection and recognition modules. Many studies have been conducted to unify these modules into an end-to-end trainable model to achieve better performance. A typical architecture places detection and recognition modules into separate branches, and a RoI pool…

Cited by 89SourcePDFScholar
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

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