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Lewei Lu

43 accepted papers

2026

ELV-Halluc: Benchmarking Semantic Aggregation Hallucinations in Video Understanding

CVPR 2026

We revisit video hallucination in multimodal large language models (Video-MLLMs) from a semantic aggregation perspective. While prior work attributes hallucinations to language priors, missing frames, or visual encoder biases, these explanations overlook errors arising during the aggregation of corr

Cited by 0SourcecodeScholar
2026

EVA: Efficient Reinforcement Learning for End-to-End Video Agent

CVPR 2026

Video understanding with multimodal large language models (MLLMs) remains challenging due to the long token sequences of videos, which contain extensive temporal dependencies and redundant frames.Existing approaches typically treat MLLMs as passive recognizers, processing entire videos or uniformly

Cited by 0SourcecodeScholar
2026

From Pixels to Words -- Towards Native Vision-Language Primitives at Scale

ICLR 2026poster

The edifice of native Vision-Language Models (VLMs) has emerged as a rising contender to typical modular VLMs, shaped by evolving model architectures and training paradigms. Yet, two lingering clouds cast shadows over its widespread exploration and promotion: (-) What fundamental constraints set nat…

Cited by 0SourcecodeScholar
2026

Omni-Perception Policy Optimization for Multimodal Emotion Reasoning

ICML 2026poster

Recent Omni-MLLMs are driving a paradigm shift in multimodal emotion recognition from label-only prediction toward *Multimodal Emotion Reasoning* (MER), where models output both emotions and textual explanations grounded in visual, acoustic, and linguistic signals. However, we show that current emot…

Cited by 0SourceScholar
2026

Scaling Spatial Intelligence with Multimodal Foundation Models

CVPR 2026

Despite remarkable progress, multimodal foundation models still exhibit surprising deficiencies in spatial intelligence. In this work, we explore scaling up multimodal foundation models to cultivate spatial intelligence within the SenseNova-SI family, built upon established multimodal foundations in

Cited by 0SourcecodeScholar
2026

SenseSearch: Empowering Vision-Language Models with High-Resolution Agentic Search-Reasoning via Reinforcement Learning

CVPR 2026

Vision-Language Models (VLMs) are limited by static knowledge and insufficient fine-grained visual analysis, hindering their performance on knowledge-intensive and visually complex tasks. While recent research has explored VLMs that employ external tools like search or cropping to enhance model perf

Cited by 0SourcecodeScholar
2026

VisuLogic: A Benchmark for Evaluating Visual Reasoning in Multi-modal Large Language Models

ICLR 2026poster

Visual reasoning is a core component of human intelligence and a critical capability for advanced multimodal models. Yet current reasoning evaluations of multimodal large language models (MLLMs) often rely on text descriptions and allow language-based reasoning shortcuts, failing to measure genuine…

Cited by 0SourcecodeScholar
2026

VisualPRM400K: An Effective Dataset for Training Multimodal Process Reward Models

ICLR 2026poster

We construct VisualPRM400K, a dataset comprising about 400K multimodal process supervision data. Building upon this dataset, we develop VisualPRM, an advanced multimodal Process Reward Model (PRM) capable of estimating the value score of each step during the reasoning process. Under the Best-of-N ev…

Cited by 0SourcecodeScholar
2025

Docopilot: Improving Multimodal Models for Document-Level Understanding

CVPR 2025poster

Despite significant progress in multimodal large language models (MLLMs), their performance on complex, multi-page document comprehension remains inadequate, largely due to the lack of high-quality, document-level datasets. While current retrieval-augmented generation (RAG) methods offer partial sol…

2025

Enhancing the Outcome Reward-based RL Training of MLLMs with Self-Consistency Sampling

NeurIPS 2025poster

Outcome‑reward reinforcement learning (RL) is a common—and increasingly significant—way to refine the step‑by‑step reasoning of multimodal large language models (MLLMs). In the multiple‑choice setting—a dominant format for multimodal reasoning benchmarks—the paradigm faces a significant yet often ov…

Cited by 0SourceScholar
2025

GUI-Reflection: Empowering Multimodal GUI Models with Self-Reflection Behavior

NeurIPS 2025poster

Multimodal Large Language Models (MLLMs) have shown great potential in revolutionizing Graphical User Interface (GUI) automation. However, existing GUI models mostly rely on learning from nearly error-free offline trajectories, thus lacking reflection and error recovery capabilities. To bridge this…

Cited by 0SourceScholar
2025

MaskGWM: A Generalizable Driving World Model with Video Mask Reconstruction

CVPR 2025poster

World models that forecast environmental changes from actions are vital for autonomous driving models with strong generalization. The prevailing driving world model mainly build on pixel-level video prediction model. Although these models can produce high-fidelity video sequences with advanced diffu…

2025

NaViL: Rethinking Scaling Properties of Native Multimodal Large Language Models under Data Constraints

NeurIPS 2025poster

Compositional training has been the de-facto paradigm in existing Multimodal Large Language Models (MLLMs), where pre-trained vision encoders are connected with pre-trained LLMs through continuous multimodal pre-training. However, the multimodal scaling property of this paradigm remains difficult…

Cited by 0SourceScholar
2025

OmniCorpus: A Unified Multimodal Corpus of 10 Billion-Level Images Interleaved with Text

ICLR 2025spotlight

Image-text interleaved data, consisting of multiple images and texts arranged in a natural document format, aligns with the presentation paradigm of internet data and closely resembles human reading habits. Recent studies have shown that such data aids multimodal in-context learning and maintains th…

2025

PVC: Progressive Visual Token Compression for Unified Image and Video Processing in Large Vision-Language Models

CVPR 2025poster

Large Vision-Language Models (VLMs) have been extended to understand both images and videos. Visual token compression is leveraged to reduce the considerable token length of visual inputs. To meet the needs of different tasks, existing high-performance models usually process images and videos separa…

2025

Spatial Preference Rewarding for MLLMs Spatial Understanding

ICCV 2025poster

Multimodal large language models(MLLMs) have demonstrated promising spatial understanding capabilities, such as referencing and grounding object descriptions. Despite their successes, MLLMs still fall short in fine-grained spatial perception abilities, such as generating detailed region descriptions…

2025

SynerGen-VL: Towards Synergistic Image Understanding and Generation with Vision Experts and Token Folding

CVPR 2025poster

The remarkable success of Large Language Models (LLMs) has extended to the multimodal domain, achieving outstanding performance in image understanding and generation. Recent efforts to develop unified Multimodal Large Language Models (MLLMs) that integrate these capabilities have shown promising res…

2025

Vision-RWKV: Efficient and Scalable Visual Perception with RWKV-Like Architectures

ICLR 2025spotlight

Transformers have revolutionized computer vision and natural language processing, but their high computational complexity limits their application in high-resolution image processing and long-context analysis. This paper introduces Vision-RWKV (VRWKV), a model that builds upon the RWKV architecture…

2024

ADDP: Learning General Representations for Image Recognition and Generation with Alternating Denoising Diffusion Process

ICLR 2024poster

Image recognition and generation have long been developed independently of each other. With the recent trend towards general-purpose representation learning, the development of general representations for both recognition and generation tasks is also promoted. However, preliminary attempts mainly fo…

2024

Auto MC-Reward: Automated Dense Reward Design with Large Language Models for Minecraft

CVPR 2024poster

Many reinforcement learning environments (e.g. Minecraft) provide only sparse rewards that indicate task completion or failure with binary values. The challenge in exploration efficiency in such environments makes it difficult for reinforcement-learning-based agents to learn complex tasks. To addres…

Cited by 38SourcePDFScholar
2024

ControlLLM: Augment Language Models with Tools by Searching on Graphs

ECCV 2024poster

"We present ControlLLM, a novel framework that enables large language models (LLMs) to utilize multi-modal tools for solving complex real-world tasks. Despite the remarkable performance of LLMs, they still struggle with tool invocation due to ambiguous user prompts, inaccurate tool selection and mis…

2024

Efficient Deformable ConvNets: Rethinking Dynamic and Sparse Operator for Vision Applications

CVPR 2024highlight

We introduce Deformable Convolution v4 (DCNv4) a highly efficient and effective operator designed for a broad spectrum of vision applications. DCNv4 addresses the limitations of its predecessor DCNv3 with two key enhancements: 1. removing softmax normalization in spatial aggregation to enhance its d…

2024

InternVL: Scaling up Vision Foundation Models and Aligning for Generic Visual-Linguistic Tasks

CVPR 2024poster

The exponential growth of large language models (LLMs) has opened up numerous possibilities for multi-modal AGI systems. However the progress in vision and vision-language foundation models which are also critical elements of multi-modal AGI has not kept pace with LLMs. In this work we design a larg…

2024

LLMs Meet VLMs: Boost Open Vocabulary Object Detection with Fine-grained Descriptors

ICLR 2024poster

Inspired by the outstanding zero-shot capability of vision language models (VLMs) in image classification tasks, open-vocabulary object detection has attracted increasing interest by distilling the broad VLM knowledge into detector training. However, most existing open-vocabulary detectors learn by…

Cited by 26SourcePDFScholar
2024

Learning 1D Causal Visual Representation with De-focus Attention Networks

NeurIPS 2024poster

Modality differences have led to the development of heterogeneous architectures for vision and language models. While images typically require 2D non-causal modeling, texts utilize 1D causal modeling. This distinction poses significant challenges in constructing unified multi-modal models. This pape…

2024

Masked AutoDecoder is Effective Multi-Task Vision Generalist

CVPR 2024poster

Inspired by the success of general-purpose models in NLP recent studies attempt to unify different vision tasks in the same sequence format and employ autoregressive Transformers for sequence prediction. They apply uni-directional attention to capture sequential dependencies and generate task sequen…

2024

Modeling Continuous Motion for 3D Point Cloud Object Tracking

AAAI 2024technical

The task of 3D single object tracking (SOT) with LiDAR point clouds is crucial for various applications, such as autonomous driving and robotics. However, existing approaches have primarily relied on appearance matching or motion modeling within only two successive frames, thereby overlooking the lo…

Cited by 6SourcePDFScholar
2024

Needle In A Multimodal Haystack

NeurIPS 2024poster

With the rapid advancement of multimodal large language models (MLLMs), their evaluation has become increasingly comprehensive. However, understanding long multimodal content, as a foundational ability for real-world applications, remains underexplored. In this work, we present Needle In A Multimoda…

2024

Parameter-Inverted Image Pyramid Networks

NeurIPS 2024spotlight

Image pyramids are commonly used in modern computer vision tasks to obtain multi-scale features for precise understanding of images. However, image pyramids process multiple resolutions of images using the same large-scale model, which requires significant computational cost. To overcome this issue,…

2024

The All-Seeing Project V2: Towards General Relation Comprehension of the Open World

ECCV 2024poster

"We present the All-Seeing Project V2: a new model and dataset designed for understanding object relations in images. Specifically, we propose the All-Seeing Model V2 () that integrates the formulation of text generation, object localization, and relation comprehension into a relation conversation (…

2024

VisionLLM v2: An End-to-End Generalist Multimodal Large Language Model for Hundreds of Vision-Language Tasks

NeurIPS 2024poster

We present VisionLLM v2, an end-to-end generalist multimodal large model (MLLM) that unifies visual perception, understanding, and generation within a single framework. Unlike traditional MLLMs limited to text output, VisionLLM v2 significantly broadens its application scope. It excels not only in c…

2024

Weakly Supervised Monocular 3D Detection with a Single-View Image

CVPR 2024poster

Monocular 3D detection (M3D) aims for precise 3D object localization from a single-view image which usually involves labor-intensive annotation of 3D detection boxes. Weakly supervised M3D has recently been studied to obviate the 3D annotation process by leveraging many existing 2D annotations but i…

Cited by 7SourcePDFScholar
2023

BEVFormer v2: Adapting Modern Image Backbones to Bird's-Eye-View Recognition via Perspective Supervision

CVPR 2023highlight

We present a novel bird's-eye-view (BEV) detector with perspective supervision, which converges faster and better suits modern image backbones. Existing state-of-the-art BEV detectors are often tied to certain depth pre-trained backbones like VoVNet, hindering the synergy between booming image backb…

Cited by 316SourcePDFScholar
2023

Distilling Focal Knowledge From Imperfect Expert for 3D Object Detection

CVPR 2023poster

Multi-camera 3D object detection blossoms in recent years and most of state-of-the-art methods are built up on the bird's-eye-view (BEV) representations. Albeit remarkable performance, these works suffer from low efficiency. Typically, knowledge distillation can be used for model compression. Howeve…

2023

InternImage: Exploring Large-Scale Vision Foundation Models With Deformable Convolutions

CVPR 2023highlight

Compared to the great progress of large-scale vision transformers (ViTs) in recent years, large-scale models based on convolutional neural networks (CNNs) are still in an early state. This work presents a new large-scale CNN-based foundation model, termed InternImage, which can obtain the gain from…

2023

Planning-Oriented Autonomous Driving

CVPR 2023poster

Modern autonomous driving system is characterized as modular tasks in sequential order, i.e., perception, prediction, and planning. In order to perform a wide diversity of tasks and achieve advanced-level intelligence, contemporary approaches either deploy standalone models for individual tasks, or…

2023

Towards All-in-One Pre-Training via Maximizing Multi-Modal Mutual Information

CVPR 2023poster

To effectively exploit the potential of large-scale models, various pre-training strategies supported by massive data from different sources are proposed, including supervised pre-training, weakly-supervised pre-training, and self-supervised pre-training. It has been proved that combining multiple p…

2021

Deformable DETR: Deformable Transformers for End-to-End Object Detection

ICLR 2021oral

DETR has been recently proposed to eliminate the need for many hand-designed components in object detection while demonstrating good performance. However, it suffers from slow convergence and limited feature spatial resolution, due to the limitation of Transformer attention modules in processing ima…

2021

FuseFormer: Fusing Fine-Grained Information in Transformers for Video Inpainting

ICCV 2021poster

Transformer, as a strong and flexible architecture for modelling long-range relations, has been widely explored in vision tasks. However, when used in video inpainting that requires fine-grained representation, existed method still suffers from yielding blurry edges in detail due to the hard patch s…

Cited by 179PDFcodeScholar
2020

VL-BERT: Pre-training of Generic Visual-Linguistic Representations

ICLR 2020poster

We introduce a new pre-trainable generic representation for visual-linguistic tasks, called Visual-Linguistic BERT (VL-BERT for short). VL-BERT adopts the simple yet powerful Transformer model as the backbone, and extends it to take both visual and linguistic embedded features as input. In it, each…

Cited by 2015SourcecodeScholar