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Zhihang Liu

6 accepted papers

2026

RegionRAG: Region-level Retrieval-Augmented Generation for Visual Document Understanding

AAAI 2026technical

Multi-modal Retrieval-Augmented Generation (RAG) has become a critical method for empowering LLMs by leveraging candidate visual documents. However, current methods consider the entire document as the basic retrieval unit, introducing substantial irrelevant visual content in two ways: 1) Relevant do

Cited by 0SourcePDFScholar
2026

ShowTable: Unlocking Creative Table Visualization with Collaborative Reflection and Refinement

CVPR 2026

While existing generation and unified models excel at general image generation, they struggle with tasks requiring deep reasoning, planning, and precise data-to-visual mapping abilities beyond general scenarios. To push beyond the existing limitations, we introduce a new and challenging task: creati

Cited by 0SourcecodeScholar
2026

SpaceVLLM: Endowing Multimodal Large Language Model with Spatio-Temporal Video Grounding Capability

AAAI 2026technical

Multimodal Large Language Models (MLLMs) have shown remarkable progress in temporal or spatial localization tasks, but struggle with joint spatio-temporal video grounding (STVG). We identify two key bottlenecks hindering this capability: (1) the sheer number of visual tokens makes long-range and fin

Cited by 0SourcePDFScholar
2025

CAPability: A Comprehensive Visual Caption Benchmark for Evaluating Both Correctness and Thoroughness

NeurIPS 2025poster

Visual captioning benchmarks have become outdated with the emergence of modern multimodal large language models (MLLMs), as the brief ground-truth sentences and traditional metrics fail to assess detailed captions effectively. While recent benchmarks attempt to address this by focusing on keyword ex…

Cited by 0SourceScholar
2025

Hybrid-Level Instruction Injection for Video Token Compression in Multi-modal Large Language Models

CVPR 2025poster

Recent Multi-modal Large Language Models (MLLMs) have been challenged by the computational overhead resulting from massive video frames, often alleviated through compression strategies. However, the visual content is not equally contributed to user instructions, existing strategies (e.g., average po…

2024

Towards Balanced Alignment: Modal-Enhanced Semantic Modeling for Video Moment Retrieval

AAAI 2024technical

Video Moment Retrieval (VMR) aims to retrieve temporal segments in untrimmed videos corresponding to a given language query by constructing cross-modal alignment strategies. However, these existing strategies are often sub-optimal since they ignore the modality imbalance problem, i.e., the semantic…