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Sicong Leng

12 accepted papers

2026

LongVT: Incentivizing "Thinking with Long Videos" via Native Tool Calling

CVPR 2026

Large multimodal models (LMMs) have shown great potential for video reasoning with textual Chain-of-Thought. However, they remain vulnerable to hallucinations, especially when processing long-form videos where evidence is sparse and temporally dispersed. Inspired by how humans comprehend long videos

Cited by 50SourcecodeScholar
2026

RynnVLA-001: Using Human Demonstrations to Improve Robot Manipulation

ICRA 2026poster

This paper presents RynnVLA-001, a vision-language-action (VLA) model built upon large-scale video generative pretraining from human demonstrations. We propose a novel two-stage pretraining methodology. The first stage, Ego-Centric Video Generative Pretraining, trains an Image-to-Video model to pred…

2025

Advancing Expert Specialization for Better MoE

NeurIPS 2025oral

Mixture-of-Experts (MoE) models enable efficient scaling of large language models (LLMs) by activating only a subset of experts per input. However, we observe that the commonly used auxiliary load balancing loss often leads to expert overlap and overly uniform routing, which hinders expert speciali…

Cited by 0SourceScholar
2025

Breaking the Memory Barrier of Contrastive Loss via Tile-Based Strategy

CVPR 2025highlight

Contrastive loss is a powerful approach for representation learning, where larger batch sizes enhance performance by providing more negative samples to better distinguish between similar and dissimilar data. However, the full instantiation of the similarity matrix demands substantial GPU memory, mak…

2025

From Easy to Hard: The MIR Benchmark for Progressive Interleaved Multi-Image Reasoning

ICCV 2025poster

Multi-image Interleaved Reasoning aims to improve Multimodal Large Language Models' (MLLMs) ability to jointly comprehend and reason across multiple images and their associated textual contexts, introducing unique challenges beyond single-image or non-interleaved multi-image tasks.While current mult…

Cited by 0SourcePDFScholar
2025

Mitigating Object Hallucinations in Large Vision-Language Models with Assembly of Global and Local Attention

CVPR 2025poster

Despite great success across various multimodal tasks, Large Vision-Language Models (LVLMs) often encounter object hallucinations with generated textual responses being inconsistent with the actual objects in images. We examine different LVLMs and pinpoint that one root cause of object hallucination…

2025

The Curse of Multi-Modalities: Evaluating Hallucinations of Large Multimodal Models across Language, Visual, and Audio

NeurIPS 2025poster

Recent advancements in large multimodal models (LMMs) have significantly enhanced performance across diverse tasks, with ongoing efforts to further integrate additional modalities such as video and audio. However, most existing LMMs remain vulnerable to hallucinations, the discrepancy between the fa…

Cited by 0SourcecodeScholar
2024

BenchX: A Unified Benchmark Framework for Medical Vision-Language Pretraining on Chest X-Rays

NeurIPS 2024poster

Medical Vision-Language Pretraining (MedVLP) shows promise in learning generalizable and transferable visual representations from paired and unpaired medical images and reports. MedVLP can provide useful features to downstream tasks and facilitate adapting task-specific models to new setups using fe…

2024

Constrained Layout Generation with Factor Graphs

CVPR 2024poster

This paper addresses the challenge of object-centric layout generation under spatial constraints seen in multiple domains including floorplan design process. The design process typically involves specifying a set of spatial constraints that include object attributes like size and inter-object relati…

Cited by 6SourcePDFScholar
2024

Mitigating Object Hallucinations in Large Vision-Language Models through Visual Contrastive Decoding

CVPR 2024highlight

Large Vision-Language Models (LVLMs) have advanced considerably intertwining visual recognition and language understanding to generate content that is not only coherent but also contextually attuned. Despite their success LVLMs still suffer from the issue of object hallucinations where models genera…

Cited by 211SourcePDFScholar
2023

Tell2Design: A Dataset for Language-Guided Floor Plan Generation

ACL 2023long

We consider the task of generating designs directly from natural language descriptions, and consider floor plan generation as the initial research area. Language conditional generative models have recently been very successful in generating high-quality artistic images. However, designs must satisfy…

2021

Interventional Video Grounding With Dual Contrastive Learning

CVPR 2021poster

Video grounding aims to localize a moment from an untrimmed video for a given textual query. Existing approaches focus more on the alignment of visual and language stimuli with various likelihood-based matching or regression strategies, i.e., P(Y|X). Consequently, these models may suffer from spurio…

Cited by 174PDFcodeScholar