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Yuhang Zang

46 accepted papers

2026

ARM-Thinker: Reinforcing Multimodal Generative Reward Models with Agentic Tool Use and Visual Reasoning

CVPR 2026

Reward models are critical for aligning vision-language systems with human preferences, yet current approaches suffer from hallucination, weak visual grounding, and an inability to use tools for verification, limiting their reliability on complex multimodal reasoning tasks.We present **ARM-Thinker**

Cited by 0SourcecodeScholar
2026

Advancing Complex Video Object Segmentation via Progressive Concept Construction

ICLR 2026poster

We propose Segment Concept (SeC), a concept-driven video object segmentation (VOS) framework that shifts from conventional feature matching to the progressive construction and utilization of high-level, object-centric representations. SeC employs Large Vision-Language Models (LVLMs) to integrate vis…

Cited by 0SourcecodeScholar
2026

Beyond Fixed: Training-Free Variable-Length Denoising for Diffusion Large Language Models

ICLR 2026poster

Diffusion Large Language Models (DLLMs) are emerging as a powerful alternative to the dominant Autoregressive Large Language Models, offering efficient parallel generation and capable global context modeling. However, the practical application of DLLMs is hindered by a critical architectural constra…

Cited by 0SourceScholar
2026

CapRL: Stimulating Dense Image Caption Capabilities via Reinforcement Learning

ICLR 2026poster

Image captioning is a fundamental task that bridges the visual and linguistic domains, playing a critical role in pre-training Large Vision-Language Models (LVLMs). Current state-of-the-art captioning models are typically trained with Supervised Fine-Tuning (SFT), a paradigm that relies on expensive…

Cited by 0SourceScholar
2026

DiCache: Let Diffusion Model Determine Its Own Cache

ICLR 2026poster

Recent years have witnessed the rapid development of acceleration techniques for diffusion models, especially caching-based acceleration methods. These studies seek to answer two fundamental questions: _"When to cache"_ and _"How to use cache"_, typically relying on predefined empirical laws or data…

Cited by 0SourcecodeScholar
2026

Fine-Grained GRPO for Precise Preference Alignment in Flow Models

CVPR 2026

The incorporation of online reinforcement learning (RL) into diffusion and flow-based generative models has recently gained attention as a powerful paradigm for aligning model behavior with human preferences. By leveraging stochastic sampling via Stochastic Differential Equations (SDEs) during the d

Cited by 0SourcecodeScholar
2026

SEAgent: Self-Evolving Computer Use Agent with Autonomous Learning from Experience

ICML 2026poster

Repurposing large vision-language models (LVLMs) as computer use agents (CUAs) has led to substantial breakthroughs, primarily driven by human-labeled data. However, these models often struggle with novel and specialized software, particularly in scenarios lacking human annotations. To address this …

Cited by 0SourceScholar
2026

SIM-CoT: Supervised Implicit Chain-of-Thought

ICLR 2026poster

Implicit Chain-of-Thought (CoT) methods offer a token-efficient alternative to explicit CoT reasoning in Large Language Models (LLMs), but a persistent performance gap has limited their adoption. We identify a core latent instability issue when scaling the computational budget of implicit CoT: as th…

Cited by 0SourcecodeScholar
2026

STAR-Bench: Probing Deep Spatio-Temporal Reasoning as Audio 4D Intelligence

ICLR 2026poster

Despite rapid progress in Multi-modal Large Language Models and Large Audio-Language Models, existing audio benchmarks largely test semantics that can be recovered from text captions, masking deficits in fine-grained perceptual reasoning. We formalize audio 4D intelligence that is defined as reasoni…

Cited by 8SourcecodeScholar
2026

ScaleCap: Scalable Image Captioning via Dual-Modality Debiasing

ICLR 2026poster

This paper presents ScaleCap, a scalable image captioning strategy that generates comprehensive and detailed image captions. The key challenges of high-quality image captioning lie in the inherent biases of LVLMs: multimodal bias resulting in imbalanced descriptive granularity, offering detailed acc…

Cited by 0SourcecodeScholar
2026

Spatial-SSRL: Enhancing Spatial Understanding via Self-Supervised Reinforcement Learning

CVPR 2026

Spatial understanding remains a weakness of Large Vision-Language Models (LVLMs). Existing supervised fine-tuning (SFT) and recent reinforcement learning with verifiable rewards (RLVR) pipelines depend on costly supervision, specialized tools, or constrained environments that limit scale. We introdu

Cited by 0SourcecodeScholar
2026

TRivia: Self-supervised Fine-tuning of Vision-Language Models for Table Recognition

CVPR 2026

Table recognition (TR) aims to transform table images into semi-structured representations such as HTML or Markdown.As a core component of document parsing, TR has long relied on supervised learning, with recent efforts dominated by fine-tuning vision-language models (VLMs) using labeled data.While

Cited by 0SourcecodeScholar
2026

Think Visually, Reason Textually: Vision-Language Synergy in Abstract Reasoning

CVPR 2026

Abstract reasoning from minimal examples remains a core unsolved problem for frontier foundation models such as GPT-5. These models still fail to infer structured transformation rules from a handful of examples, which is a key hallmark of human intelligence. The Abstraction and Reasoning Corpus for

Cited by 0SourcecodeScholar
2026

Visual Self-Refine: A Pixel-Guided Paradigm for Accurate Chart Parsing

ICLR 2026poster

While Large Vision-Language Models (LVLMs) have demonstrated remarkable capabilities for reasoning and self-correction at the textual level, these strengths provide minimal benefits for complex tasks centered on visual perception, such as Chart Parsing. Existing models often struggle with visually d…

Cited by 0SourcecodeScholar
2025

Bootstrap3D: Improving Multi-view Diffusion Model with Synthetic Data

ICCV 2025poster

Recent years have witnessed remarkable progress in multi-view diffusion models for 3D content creation. However, there remains a significant gap in image quality and prompt-following ability compared to 2D diffusion models. A critical bottleneck is the scarcity of high-quality 3D data with detailed…

2025

Bootstrapping Grounded Chain-of-Thought in Multimodal LLMs for Data-Efficient Model Adaptation

ICCV 2025poster

Multimodal Large Language Models (MLLMs) have demonstrated remarkable capabilities in interpreting images using natural language. However, without using large-scale datasets for retraining, these models are difficult to adapt to specialized vision tasks, e.g., chart understanding. This problem is ca…

2025

ByTheWay: Boost Your Text-to-Video Generation Model to Higher Quality in a Training-free Way

CVPR 2025poster

The text-to-video (T2V) generation models, offering convenient visual creation, have recently garnered increasing attention. Despite their substantial potential, the generated videos may present artifacts, including structural implausibility, temporal inconsistency, and a lack of motion, often resul…

2025

Conical Visual Concentration for Efficient Large Vision-Language Models

CVPR 2025poster

In large vision-language models (LVLMs), images serve as inputs that carry a wealth of information. As the idiom "A picture is worth a thousand words" implies, representing a single image in current LVLMs can require hundreds or even thousands of tokens. This results in significant computational cos…

2025

Deciphering Cross-Modal Alignment in Large Vision-Language Models via Modality Integration Rate

ICCV 2025poster

The early stage of multi-modal pre-training plays a pivotal role in aligning two modalities for Large Vision-Language Models (LVLMs), while evaluating its training quality usually requires the costly supervised fine-tuning (SFT) stage to verify the downstream benchmark scores. Loss, perplexity, and…

2025

Dispider: Enabling Video LLMs with Active Real-Time Interaction via Disentangled Perception, Decision, and Reaction

CVPR 2025poster

Active Real-time interaction with video LLMs introduces a new paradigm for human-computer interaction, where the model not only understands user intent but also responds while continuously processing streaming video on the fly. Unlike offline video LLMs, which analyze the entire video before answeri…

2025

HiFlow: Training-free High-Resolution Image Generation with Flow-Aligned Guidance

NeurIPS 2025poster

Text-to-image (T2I) diffusion/flow models have drawn considerable attention recently due to their remarkable ability to deliver flexible visual creations. Still, high-resolution image synthesis presents formidable challenges due to the scarcity and complexity of high-resolution content. Recent appro…

Cited by 0SourceScholar
2025

InternLM-XComposer2.5-Reward: A Simple Yet Effective Multi-Modal Reward Model

ACL 2025finding

Despite the promising performance of Large Vision Language Models (LVLMs) in visual understanding, they occasionally generate incorrect outputs. While reward models (RMs) with reinforcement learning or test-time scaling offer the potential for improving generation quality, a critical gap remains: pu…

2025

MIA-DPO: Multi-Image Augmented Direct Preference Optimization For Large Vision-Language Models

ICLR 2025poster

Visual preference alignment involves training Large Vision-Language Models (LVLMs) to predict human preferences between visual inputs. This is typically achieved by using labeled datasets of chosen/rejected pairs and employing optimization algorithms like direct preference optimization (DPO). Existi…

2025

MM-IFEngine: Towards Multimodal Instruction Following

ICCV 2025poster

The Instruction Following (IF) ability measures how well Multi-modal Large Language Models (MLLMs) understand exactly what users are telling them and doing it right.Existing multimodal instruction following training data is scarce, the benchmarks are simple with atomic instructions, and the evaluati…

2025

MotionClone: Training-Free Motion Cloning for Controllable Video Generation

ICLR 2025poster

Motion-based controllable video generation offers the potential for creating captivating visual content. Existing methods typically necessitate model training to encode particular motion cues or incorporate fine-tuning to inject certain motion patterns, resulting in limited flexibility and generaliz…

Cited by 34SourcePDFScholar
2025

OVO-Bench: How Far is Your Video-LLMs from Real-World Online Video Understanding?

CVPR 2025poster

Temporal Awareness, the ability to reason dynamically based on the timestamp when a question is raised, is the key distinction between offline and online video LLMs. Unlike offline models, which rely on complete videos for static, post hoc analysis, online models process video streams incrementally…

2025

SAM2Long: Enhancing SAM 2 for Long Video Segmentation with a Training-Free Memory Tree

ICCV 2025poster

The Segment Anything Model 2 (SAM 2) has emerged as a powerful foundation model for object segmentation in both images and videos. The crucial design of SAM 2 for video segmentation is its memory module, which prompts object-aware memories from previous frames for current frame prediction. However,…

2025

SongGen: A Single Stage Auto-regressive Transformer for Text-to-Song Generation

ICML 2025poster

Text-to-song generation, the task of creating vocals and accompaniment from textual inputs, poses significant challenges due to domain complexity and data scarcity. Existing approaches often employ multi-stage generation procedures, leading to cumbersome training and inference pipelines, as well as…

2025

Towards Storage-Efficient Visual Document Retrieval: An Empirical Study on Reducing Patch-Level Embeddings

ACL 2025finding

Despite the strong performance of ColPali/ColQwen2 in Visualized Document Retrieval (VDR), its patch-level embedding approach leads to excessive memory usage. This empirical study investigates methods to reduce patch embeddings per page while minimizing performance degradation. We evaluate two token…

2025

Unified Multimodal Chain-of-Thought Reward Model through Reinforcement Fine-Tuning

NeurIPS 2025poster

Recent advances in multimodal Reward Models (RMs) have shown significant promise in delivering reward signals to align vision models with human preferences. However, current RMs are generally restricted to providing direct responses or engaging in shallow reasoning processes with limited depth, ofte…

Cited by 0SourceScholar
2025

VideoRoPE: What Makes for Good Video Rotary Position Embedding?

ICML 2025oral

While Rotary Position Embedding (RoPE) and its variants are widely adopted for their long-context capabilities, the extension of the 1D RoPE to video, with its complex spatio-temporal structure, remains an open challenge. This work first introduces a comprehensive analysis that identifies four key c…

2025

WildAvatar: Learning In-the-wild 3D Avatars from the Web

CVPR 2025poster

Existing research on avatar creation is typically limited to laboratory datasets, which require high costs against scalability and exhibit insufficient representation of the real world. On the other hand, the web abounds with off-the-shelf real-world human videos, but these videos vary in quality an…

Cited by 2SourcePDFScholar
2025

X-Prompt: Generalizable Auto-Regressive Visual Learning with In-Context Prompting

ICCV 2025poster

Recent advances in large language models have enabled task prompting for open-ended text generation. In the vision domain, a longstanding goal is developing models capable of general visual learning, encompassing tasks such as image generation, editing, low-level processing, and dense perception. Al…

Cited by 0SourcePDFScholar
2024

Are We on the Right Way for Evaluating Large Vision-Language Models?

NeurIPS 2024poster

Large vision-language models (LVLMs) have recently achieved rapid progress, sparking numerous studies to evaluate their multi-modal capabilities. However, we dig into current evaluation works and identify two primary issues: 1) Visual content is unnecessary for many samples. The answers can be direc…

2024

InternLM-XComposer2-4KHD: A Pioneering Large Vision-Language Model Handling Resolutions from 336 Pixels to 4K HD

NeurIPS 2024poster

The Large Vision-Language Model (LVLM) field has seen significant advancements, yet its progression has been hindered by challenges in comprehending fine-grained visual content due to limited resolution. Recent efforts have aimed to enhance the high-resolution understanding capabilities of LVLMs, ye…

2024

Long-CLIP: Unlocking the Long-Text Capability of CLIP

ECCV 2024poster

"Contrastive Language-Image Pre-training (CLIP) has been the cornerstone for zero-shot classification, text-image retrieval, and text-image generation by aligning image and text modalities. Despite its widespread adoption, a significant limitation of CLIP lies in the inadequate length of text input.…

2024

MMDU: A Multi-Turn Multi-Image Dialog Understanding Benchmark and Instruction-Tuning Dataset for LVLMs

NeurIPS 2024poster

Generating natural and meaningful responses to communicate with multi-modal human inputs is a fundamental capability of Large Vision-Language Models (LVLMs). While current open-source LVLMs demonstrate promising performance in simplified scenarios such as single-turn single-image input, they fall sh…

2024

MMLONGBENCH-DOC: Benchmarking Long-context Document Understanding with Visualizations

NeurIPS 2024spotlight

Understanding documents with rich layouts and multi-modal components is a long-standing and practical task. Recent Large Vision-Language Models (LVLMs) have made remarkable strides in various tasks, particularly in single-page document understanding (DU). However, their abilities on long-context DU…

Cited by 27SourcePDFScholar
2024

MVSGaussian: Fast Generalizable Gaussian Splatting Reconstruction from Multi-View Stereo

ECCV 2024poster

"We present MVSGaussian, a new generalizable 3D Gaussian representation approach derived from Multi-View Stereo (MVS) that can efficiently reconstruct unseen scenes. Specifically, 1) we leverage MVS to encode geometry-aware Gaussian representations and decode them into Gaussian parameters. 2) To fur…

2024

Overcoming the Pitfalls of Vision-Language Model Finetuning for OOD Generalization

ICLR 2024poster

Existing vision-language models exhibit strong generalization on a variety of visual domains and tasks. However, such models mainly perform zero-shot recognition in a closed-set manner, and thus struggle to handle open-domain visual concepts by design. There are recent finetuning methods, such as pr…

2024

ShareGPT4Video: Improving Video Understanding and Generation with Better Captions

NeurIPS 2024poster

We present the ShareGPT4Video series, aiming to facilitate the video understanding of large video-language models (LVLMs) and the video generation of text-to-video models (T2VMs) via dense and precise captions. The series comprises: 1) ShareGPT4Video, 40K GPT4V annotated dense captions of videos wit…

Cited by 156SourcePDFScholar
2024

Streaming Long Video Understanding with Large Language Models

NeurIPS 2024poster

This paper presents VideoStreaming, an advanced vision-language large model (VLLM) for video understanding, that capably understands arbitrary-length video with a constant number of video tokens streamingly encoded and adaptively selected. The challenge of video understanding in the vision language…

Cited by 44SourcePDFScholar
2022

Open-Vocabulary DETR with Conditional Matching

ECCV 2022poster

"Open-vocabulary object detection, which is concerned with the problem of detecting novel objects guided by natural language, has gained increasing attention from the community. Ideally, we would like to extend an open-vocabulary detector such that it can produce bounding box predictions based on us…

2021

FASA: Feature Augmentation and Sampling Adaptation for Long-Tailed Instance Segmentation

ICCV 2021poster

Recent methods for long-tailed instance segmentation still struggle on rare object classes with few training data. We propose a simple yet effective method, Feature Augmentation and Sampling Adaptation (FASA), that addresses the data scarcity issue by augmenting the feature space especially for rare…

Cited by 148PDFcodeScholar
2021

Seesaw Loss for Long-Tailed Instance Segmentation

CVPR 2021poster

Instance segmentation has witnessed a remarkable progress on class-balanced benchmarks. However, they fail to perform as accurately in real-world scenarios, where the category distribution of objects naturally comes with a long tail. Instances of head classes dominate a long-tailed dataset and they…

Cited by 326PDFcodeScholar
2019

Efficient and Accurate Arbitrary-Shaped Text Detection With Pixel Aggregation Network

ICCV 2019poster

Scene text detection, an important step of scene text reading systems, has witnessed rapid development with convolutional neural networks. Nonetheless, two main challenges still exist and hamper its deployment to real-world applications. The first problem is the trade-off between speed and accuracy.…

Cited by 666PDFcodeScholar