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Zhihong Chen

24 accepted papers

2026

OpenGPT-4o-Image: A Comprehensive Dataset for Advanced Image Generation and Editing

ICML 2026poster

The performance of unified multimodal models for image generation and editing is fundamentally constrained by the quality and comprehensiveness of their training data. While existing datasets have covered basic tasks like style transfer and simple object manipulation, they often lack the systematic …

Cited by 0SourceScholar
2025

Automated Structured Radiology Report Generation

ACL 2025long

Automated radiology report generation from chest X-ray (CXR) images has the potential to improve clinical efficiency and reduce radiologists’ workload. However, most datasets, including the publicly available MIMIC-CXR and CheXpert Plus, consist entirely of free-form reports, which are inherently va…

Cited by 0SourcePDFScholar
2025

CheXalign: Preference fine-tuning in chest X-ray interpretation models without human feedback

ACL 2025long

Radiologists play a crucial role in translating medical images into actionable reports. However, the field faces staffing shortages and increasing workloads. While automated approaches using vision-language models (VLMs) show promise as assistants, they require exceptionally high accuracy. Most curr…

2025

MLLM-Bench: Evaluating Multimodal LLMs with Per-sample Criteria

NAACL 2025long

Multimodal large language models (MLLMs) have broadened the scope of AI applications. Existing automatic evaluation methodologies for MLLMs are mainly limited in evaluating objective queries without considering real-world user experiences, inadequately addressing the nuances of creative and associat…

2024

AceGPT, Localizing Large Language Models in Arabic

NAACL 2024long

This paper is devoted to the development of a localized Large Language Model (LLM) specifically for Arabic, a language imbued with unique cultural characteristics inadequately addressed by current mainstream models. Significant concerns emerge when addressing cultural sensitivity and local values. T…

2024

CMB: A Comprehensive Medical Benchmark in Chinese

NAACL 2024long

Large Language Models (LLMs) provide a possibility to make a great breakthrough in medicine. The establishment of a standardized medical benchmark becomes a fundamental cornerstone to measure progression. However, medical environments in different regions have their local characteristics, e.g., the…

2024

GREEN: Generative Radiology Report Evaluation and Error Notation

EMNLP 2024finding

Evaluating radiology reports is a challenging problem as factual correctness is extremely important due to its medical nature. Existing automatic evaluation metrics either suffer from failing to consider factual correctness (e.g., BLEU and ROUGE) or are limited in their interpretability (e.g., F1Che…

Cited by 19SourcePDFScholar
2024

RaVL: Discovering and Mitigating Spurious Correlations in Fine-Tuned Vision-Language Models

NeurIPS 2024poster

Fine-tuned vision-language models (VLMs) often capture spurious correlations between image features and textual attributes, resulting in degraded zero-shot performance at test time. Existing approaches for addressing spurious correlations (i) primarily operate at the global image-level rather than i…

2024

RadGraph-XL: A Large-Scale Expert-Annotated Dataset for Entity and Relation Extraction from Radiology Reports

ACL 2024findings

In order to enable extraction of structured clinical data from unstructured radiology reports, we introduce RadGraph-XL, a large-scale, expert-annotated dataset for clinical entity and relation extraction. RadGraph-XL consists of 2,300 radiology reports, which are annotated with over 410,000 entitie…

2024

WhodunitBench: Evaluating Large Multimodal Agents via Murder Mystery Games

NeurIPS 2024spotlight

Recently, large language models (LLMs) have achieved superior performance, empowering the development of large multimodal agents (LMAs). An LMA is anticipated to execute practical tasks requires various capabilities including multimodal perception, interaction, reasoning, and decision making. Howeve…

Cited by 1SourcePDFScholar
2023

A Simple Yet Effective Subsequence-Enhanced Approach for Cross-Domain NER

AAAI 2023technical

Cross-domain named entity recognition (NER), aiming to address the limitation of labeled resources in the target domain, is a challenging yet important task. Most existing studies alleviate the data discrepancy across different domains at the coarse level via combing NER with language modelings or i…

2023

Advancing Visual Grounding With Scene Knowledge: Benchmark and Method

CVPR 2023poster

Visual grounding (VG) aims to establish fine-grained alignment between vision and language. Ideally, it can be a testbed for vision-and-language models to evaluate their understanding of the images and texts and their reasoning abilities over their joint space. However, most existing VG datasets are…

2023

Bridging Vision and Language Encoders: Parameter-Efficient Tuning for Referring Image Segmentation

ICCV 2023poster

Parameter efficient tuning (PET) has received considerable attention owing to its applicability to reduce the number of parameters that need to be updated while maintaining competitive performance and providing better hardware resource savings. Although substantial progress has been made, most exist…

Cited by 73PDFcodeScholar
2023

EASAL: Entity-Aware Subsequence-Based Active Learning for Named Entity Recognition

AAAI 2023technical

Active learning is a critical technique for reducing labelling load by selecting the most informative data. Most previous works applied active learning on Named Entity Recognition (token-level task) similar to the text classification (sentence-level task). They failed to consider the heterogeneity o…

2023

HuatuoGPT, Towards Taming Language Model to Be a Doctor

EMNLP 2023long findings

In this paper, we present HuatuoGPT, a Large Language Model (LLM) for medical consultation. The core recipe of HuatuoGPT is to leverage both distilled data from **ChatGPT** and real-world data from **doctors** in the supervised fine-tuning stage. This is not only because purely using **ChatGPT**-di…

Cited by 0SourcecodeScholar
2023

Improving Radiology Summarization with Radiograph and Anatomy Prompts

ACL 2023findings

The impression is crucial for the referring physicians to grasp key information since it is concluded from the findings and reasoning of radiologists. To alleviate the workload of radiologists and reduce repetitive human labor in impression writing, many researchers have focused on automatic impress…

2023

On the Difference of BERT-style and CLIP-style Text Encoders

ACL 2023findings

Masked language modeling (MLM) has been one of the most popular pretraining recipes in natural language processing, e.g., BERT, one of the representative models. Recently, contrastive language-image pretraining (CLIP) has also attracted attention, especially its vision models that achieve excellent…

2023

Toward Expanding the Scope of Radiology Report Summarization to Multiple Anatomies and Modalities

ACL 2023short

Radiology report summarization (RRS) is a growing area of research. Given the Findings section of a radiology report, the goal is to generate a summary (called an Impression section) that highlights the key observations and conclusions of the radiology study. However, RRS currently faces essential l…

2023

Towards Unifying Medical Vision-and-Language Pre-Training via Soft Prompts

ICCV 2023poster

Medical vision-and-language pre-training (Med-VLP) has shown promising improvements on many downstream medical tasks owing to its applicability to extracting generic representations from medical images and texts. Practically, there exist two typical types, i.e., the fusion-encoder type and the dual-…

Cited by 39PDFcodeScholar
2022

Graph Enhanced Contrastive Learning for Radiology Findings Summarization

ACL 2022long

The impression section of a radiology report summarizes the most prominent observation from the findings section and is the most important section for radiologists to communicate to physicians. Summarizing findings is time-consuming and can be prone to error for inexperienced radiologists, and thus…

2021

Cross-modal Memory Networks for Radiology Report Generation

ACL 2021long

Medical imaging plays a significant role in clinical practice of medical diagnosis, where the text reports of the images are essential in understanding them and facilitating later treatments. By generating the reports automatically, it is beneficial to help lighten the burden of radiologists and sig…

2021

Generalizable Representation Learning for Mixture Domain Face Anti-Spoofing

AAAI 2021technical

Face anti-spoofing approach based on domain generalization (DG) has drawn growing attention due to its robustness for unseen scenarios. Existing DG methods assume that the domain label is known. However, in real-world applications, the collected dataset always contains mixture domains, where the dom…

Cited by 126SourcePDFScholar
2020

Selective Transfer With Reinforced Transfer Network for Partial Domain Adaptation

CVPR 2020poster

One crucial aspect of partial domain adaptation (PDA) is how to select the relevant source samples in the shared classes for knowledge transfer. Previous PDA methods tackle this problem by re-weighting the source samples based on their high-level information (deep features). However, since the domai…

Cited by 80PDFScholar