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Liangcai Gao

16 accepted papers

2026

Clair Obscur: an Illumination-Aware Method for Real-World Image Vectorization

CVPR 2026

Image vectorization aims to convert raster images into editable, scalable vector representations while preserving visual fidelity. Existing vectorization methods struggle to represent complex real-world images, often producing fragmented shapes at the cost of semantic conciseness. In this paper, we

Cited by 0SourceScholar
2026

Uni-DocRobust: Universal Plug-and-Play Robustness Enhancement for Multi-modal LLMs via Feature Restoration

ICML 2026poster

Real-world degradations, such as noise, blur, and low resolution, significantly impair the performance of Multi-modal Large Language Models (MLLMs) in document understanding tasks. Despite recent advancements, progress in this field remains stifled by two critical bottlenecks: the scarcity of large-…

Cited by 0SourceScholar
2025

Do Large Language Models excel in Complex Logical Reasoning with Formal Language?

EMNLP 2025

Large Language Models (LLMs) have been shown to achieve breakthrough performances on complex logical reasoning tasks. Nevertheless, most existing research focuses on employing formal language to guide LLMs for deriving reliable reasoning paths, with systematic evaluations of these capabilities still

2025

DocVideoQA: Towards Comprehensive Understanding of Document-Centric Videos through Question Answering

ICASSP 2025accepted

Remote work and online courses have become important methods of knowledge dissemination, leading to a large number of document-based instructional videos. Unlike traditional video datasets, these videos mainly feature rich-text images and audio that are densely packed with information closely tied t…

Cited by 0SourceScholar
2025

GlyphSR: A Simple Glyph-Aware Framework for Scene Text Image Super-Resolution

AAAI 2025technical

The goal of scene text image super-resolution (STISR) is to enhance the clarity of text within line images, thereby improving readability and enabling more accurate text recognition. However, existing STISR methods often rely heavily on Text Prior (TP) derived from trained recognizers, which can be…

Cited by 0SourcePDFScholar
2025

LogicPro: Improving Complex Logical Reasoning via Program-Guided Learning

ACL 2025long

In this paper, we propose a new data synthesis method called LogicPro, which leverages LeetCode-style algorithm Problems and their corresponding Program solutions to synthesize Complex Logical Reasoning data in text format. First, we synthesize complex reasoning problems through source algorithm pro…

2025

TAMER: Tree-Aware Transformer for Handwritten Mathematical Expression Recognition

AAAI 2025technical

Handwritten Mathematical Expression Recognition (HMER) has extensive applications in automated grading and office automation. However, existing sequence-based decoding methods, which directly predict LaTeX sequences, struggle to understand and model the inherent tree structure of LaTeX and often fa…

2025

Uni-MuMER: Unified Multi-Task Fine-Tuning of Vision-Language Model for Handwritten Mathematical Expression Recognition

NeurIPS 2025spotlight

Handwritten Mathematical Expression Recognition (HMER) remains a persistent challenge in Optical Character Recognition (OCR) due to the inherent freedom of symbol layouts and variability in handwriting styles. Prior methods have faced performance bottlenecks by proposing isolated architectural modif…

Cited by 0SourcecodeScholar
2024

Maskstr: Guide Scene Text Recognition Models with Masking

ICASSP 2024accepted

Text recognition in information loss scenarios like blurriness, occlusion, and perspective distortion is challenging in real-world applications. To enhance robustness, some studies use extra unlabeled data for encoder pretraining. Others focus on improving decoder context reasoning. However, pretrai…

Cited by 0SourceScholar
2024

Recognition-Guided Diffusion Model for Scene Text Image Super-Resolution

ICASSP 2024accepted

Scene Text Image Super-Resolution (STISR) aims to enhance the resolution and legibility of text within low-resolution (LR) images, consequently elevating recognition accuracy in Scene Text Recognition (STR). Previous methods predominantly employ discriminative Convolutional Neural Networks (CNNs) au…

Cited by 0SourceScholar
2023

GeoDRL: A Self-Learning Framework for Geometry Problem Solving using Reinforcement Learning in Deductive Reasoning

ACL 2023findings

Ensuring both interpretability and correctness is a great challenge in automated geometry problem solving (GPS), and the scarcity of labeled data hinders learning mathematical reasoning from samples. Therefore, we present GeoDRL, a self-learning geometry problem solving framework that integrates log…

2023

Improving Table Structure Recognition With Visual-Alignment Sequential Coordinate Modeling

CVPR 2023poster

Table structure recognition aims to extract the logical and physical structure of unstructured table images into a machine-readable format. The latest end-to-end image-to-text approaches simultaneously predict the two structures by two decoders, where the prediction of the physical structure (the bo…

Cited by 40SourcePDFScholar
2022

CoMER: Modeling Coverage for Transformer-Based Handwritten Mathematical Expression Recognition

ECCV 2022poster

"The Transformer-based encoder-decoder architecture has recently made significant advances in recognizing handwritten mathematical expressions. However, the transformer model still suffers from the lack of coverage problem, making its expression recognition rate (ExpRate) inferior to its RNN counter…

2022

Cycle Representation Learning for Inductive Relation Prediction

ICML 2022spotlight

In recent years, algebraic topology and its modern development, the theory of persistent homology, has shown great potential in graph representation learning. In this paper, based on the mathematics of algebraic topology, we propose a novel solution for inductive relation prediction, an important le…

2022

Neural Approximation of Graph Topological Features

NeurIPS 2022accept

Topological features based on persistent homology capture high-order structural information so as to augment graph neural network methods. However, computing extended persistent homology summaries remains slow for large and dense graphs and can be a serious bottleneck for the learning pipeline. Insp…

2021

Link Prediction with Persistent Homology: An Interactive View

ICML 2021spotlight

Link prediction is an important learning task for graph-structured data. In this paper, we propose a novel topological approach to characterize interactions between two nodes. Our topological feature, based on the extended persistent homology, encodes rich structural information regarding the multi-…