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Junnan Li

43 accepted papers

2026

CoAct-1: Computer-using Multi-agent System with Coding Actions

ICLR 2026poster

Autonomous agents that operate computers via Graphical User Interfaces (GUIs) often struggle with efficiency and reliability on complex, long-horizon tasks. While augmenting these agents with planners can improve task decomposition, they remain constrained by the inherent limitations of performing a…

Cited by 0SourcecodeScholar
2026

Learning to Reason over Continuous Tokens with Reinforcement Learning

ICLR 2026poster

Large Language Models (LLMs) have shown strong performance in complex reasoning tasks, especially when guided by Chain-of-Thought (CoT) prompting. However, conventional CoT reasoning in the discrete token space suffers from high computational and memory costs due to verbose intermediate steps. Recen…

Cited by 0SourceScholar
2026

One-Step Flow for Image Super-Resolution with Tunable Fidelity-Realism Trade-offs

ICLR 2026poster

Recent advances in diffusion and flow-based generative models have demonstrated remarkable success in image restoration tasks, achieving superior perceptual quality compared to traditional deep learning approaches. However, these methods either require numerous sampling steps to generate high-qualit…

Cited by 0SourcecodeScholar
2026

Scalable Chain of Thoughts via Elastic Reasoning

ICLR 2026poster

Large reasoning models (LRMs) have achieved remarkable progress on complex tasks by generating extended chains of thought (CoT). However, their uncontrolled output lengths pose significant challenges for real-world deployment, where inference-time budgets on tokens, latency, or compute are strictly…

Cited by 0SourcecodeScholar
2026

WALT: Web Agents that Learn Tools

ICLR 2026poster

Web agents promise to automate complex browser tasks, but current methods remain brittle -- relying on step-by-step UI interactions and heavy LLM reasoning that break under dynamic layouts and long horizons. Humans, by contrast, exploit website-provided functionality through high-level operations li…

Cited by 0SourcecodeScholar
2025

Aria-UI: Visual Grounding for GUI Instructions

ACL 2025finding

Digital agents for automating tasks across different platforms by directly manipulating the GUIs are increasingly important. For these agents, grounding from language instructions to target elements remains a significant challenge due to reliance on HTML or AXTree inputs. In this paper, we introduce…

Cited by 0SourcePDFScholar
2025

Generative Frame Sampler for Long Video Understanding

ACL 2025finding

Despite recent advances in Video Large Language Models (VideoLLMs), effectively understanding long-form videos remains a significant challenge. Perceiving lengthy videos containing thousands of frames poses substantial computational burden. To mitigate this issue, this paper introduces Generative Fr…

2025

Moirai-MoE: Empowering Time Series Foundation Models with Sparse Mixture of Experts

ICML 2025poster

Achieving effective unified pretraining on large time series corpora remains an open challenge in developing time series foundation models. Existing methods, such as Moirai, introduce multiple projection layers for time series of different frequencies to account for high data heterogeneity. We ident…

Cited by 0SourcePDFScholar
2025

ProBench: Judging Multimodal Foundation Models on Open-ended Multi-domain Expert Tasks

ACL 2025finding

Solving expert-level multimodal tasks is a key milestone in general intelligence. As the capabilities of multimodal large language models (MLLMs) continue to evolve, evaluation of frontier multimodal intelligence becomes necessary yet challenging. In this work, we introduce ProBench, a benchmark of…

Cited by 0SourcePDFScholar
2025

Reward-Guided Speculative Decoding for Efficient LLM Reasoning

ICML 2025poster

We introduce Reward-Guided Speculative Decoding (RSD), a novel framework aimed at improving the efficiency of inference in large language models (LLMs). RSD synergistically combines a lightweight draft model with a more powerful target model, incorporating a controlled bias to prioritize high-reward…

Cited by 14SourcePDFScholar
2025

The Emergence of Abstract Thought in Large Language Models Beyond Any Language

NeurIPS 2025poster

As large language models (LLMs) continue to advance, their capacity to function effectively across a diverse range of languages has shown marked improvement. Preliminary studies observe that the hidden activations of LLMs often resemble English, even when responding to non-English prompts. This has…

Cited by 0SourceScholar
2025

VideoAutoArena: An Automated Arena for Evaluating Large Multimodal Models in Video Analysis through User Simulation

CVPR 2025poster

Large multimodal models (LMMs) with advanced video analysis capabilities have recently garnered significant attention. However, most evaluations rely on traditional methods like multiple-choice question answering in benchmarks such as VideoMME and LongVideoBench, which are prone to lack the depth ne…

Cited by 6SourcePDFScholar
2024

Identification and validation of the dynamic model of a tendon-driven anthropomorphic finger

IROS 2024poster

This study addresses the absence of an identification framework to quantify a comprehensive dynamic model of human and anthropomorphic tendon-driven fingers, which is necessary to investigate the physiological properties of human fingers and improve the control of robotic hands. First, a generalized…

Cited by 0SourceScholar
2024

LongVideoBench: A Benchmark for Long-context Interleaved Video-Language Understanding

NeurIPS 2024poster

Large multimodal models (LMMs) are processing increasingly longer and richer inputs. Albeit the progress, few public benchmark is available to measure such development. To mitigate this gap, we introduce LongVideoBench, a question-answering benchmark that features video-language interleaved inputs u…

2024

Object Augmentation Algorithm: Computing virtual object motion and object induced interaction wrench from optical markers

IROS 2024

This study addresses the critical need for diverse and comprehensive data focused on human arm joint torques while performing activities of daily living (ADL). Previous studies have often overlooked the influence of objects on joint torques during ADL, resulting in limited datasets for analysis. To

Cited by 1SourcecodeScholar
2024

Optimizing Interaction Space: Enlarging the Capture Volume for Multiple Portable Motion Capture Devices

IROS 2024poster

Markerless motion capture devices such as the Leap Motion Controller (LMC) have been extensively used for tracking hand, wrist, and forearm positions as an alternative to Marker-based Motion Capture (MMC). However, previous studies have highlighted the subpar performance of LMC in reliably recording…

Cited by 1SourcecodeScholar
2024

The Fingertip Manipulability Assessment of Tendon-Driven Multi-Fingered Hands

RA-L 2024

The ability of robotic fingers to exert force and exhibit motion is vital for achieving dexterity in manipulation tasks. To evaluate dexterous capabilities in terms of both features, i.e., quantifying finger performance that facilitates task planning and design optimization, we introduce the Fingert

Cited by 2SourceScholar
2024

ULIP-2: Towards Scalable Multimodal Pre-training for 3D Understanding

CVPR 2024poster

Recent advancements in multimodal pre-training have shown promising efficacy in 3D representation learning by aligning multimodal features across 3D shapes their 2D counterparts and language descriptions. However the methods used by existing frameworks to curate such multimodal data in particular la…

2024

What Are We Measuring When We Evaluate Large Vision-Language Models? An Analysis of Latent Factors and Biases

NAACL 2024long

Vision-language (VL) models, pretrained on colossal image-text datasets, have attained broad VL competence that is difficult to evaluate. A common belief is that a small number of VL skills underlie the variety of VL tests. In this paper, we perform a large-scale transfer learning experiment aimed a…

2023

BLIP-2: Bootstrapping Language-Image Pre-training with Frozen Image Encoders and Large Language Models

ICML 2023poster

The cost of vision-and-language pre-training has become increasingly prohibitive due to end-to-end training of large-scale models. This paper proposes BLIP-2, a generic and efficient pre-training strategy that bootstraps vision-language pre-training from off-the-shelf frozen pre-trained image encode…

2023

BLIP-Diffusion: Pre-trained Subject Representation for Controllable Text-to-Image Generation and Editing

NeurIPS 2023poster

Subject-driven text-to-image generation models create novel renditions of an input subject based on text prompts. Existing models suffer from lengthy fine-tuning and difficulties preserving the subject fidelity. To overcome these limitations, we introduce BLIP-Diffusion, a new subject-driven image g…

2023

CodeT5+: Open Code Large Language Models for Code Understanding and Generation

EMNLP 2023long main

Large language models (LLMs) pretrained on vast source code have achieved prominent progress in code intelligence. However, existing code LLMs have two main limitations. First, they often adopt a specific architecture (encoder-only or decoder-only) or rely on a unified encoder-decoder network for d…

Cited by 0SourcecodeScholar
2023

From Images to Textual Prompts: Zero-Shot Visual Question Answering With Frozen Large Language Models

CVPR 2023poster

Large language models (LLMs) have demonstrated excellent zero-shot generalization to new language tasks. However, effective utilization of LLMs for zero-shot visual question-answering (VQA) remains challenging, primarily due to the modality disconnection and task disconnection between LLM and VQA ta…

2023

InstructBLIP: Towards General-purpose Vision-Language Models with Instruction Tuning

NeurIPS 2023poster

Large-scale pre-training and instruction tuning have been successful at creating general-purpose language models with broad competence. However, building general-purpose vision-language models is challenging due to the rich input distributions and task diversity resulting from the additional visual…

2023

Masked Unsupervised Self-training for Label-free Image Classification

ICLR 2023poster

State-of-the-art computer vision models are mostly trained with supervised learning using human-labeled images, which limits their scalability due to the expensive annotation cost. While self-supervised representation learning has achieved impressive progress, it still requires a second stage of fin…

2023

Tackling Data Heterogeneity in Federated Learning with Class Prototypes

AAAI 2023technical

Data heterogeneity across clients in federated learning (FL) settings is a widely acknowledged challenge. In response, personalized federated learning (PFL) emerged as a framework to curate local models for clients' tasks. In PFL, a common strategy is to develop local and global models jointly - the…

2022

Align and Prompt: Video-and-Language Pre-Training With Entity Prompts

CVPR 2022poster

Video-and-language pre-training has shown promising improvements on various downstream tasks. Most previous methods capture cross-modal interactions with a transformer-based multimodal encoder, not fully addressing the misalignment between unimodal video and text features. Besides, learning fine-gra…

Cited by 235PDFcodeScholar
2022

BLIP: Bootstrapping Language-Image Pre-training for Unified Vision-Language Understanding and Generation

ICML 2022spotlight

Vision-Language Pre-training (VLP) has advanced the performance for many vision-language tasks. However, most existing pre-trained models only excel in either understanding-based tasks or generation-based tasks. Furthermore, performance improvement has been largely achieved by scaling up the dataset…

2022

Open Vocabulary Object Detection with Pseudo Bounding-Box Labels

ECCV 2022poster

"Despite great progress in object detection, most existing methods work only on a limited set of object categories, due to the tremendous human effort needed for bounding-box annotations of training data. To alleviate the problem, recent open vocabulary and zero-shot detection methods attempt to det…

2022

Plug-and-Play VQA: Zero-shot VQA by Conjoining Large Pretrained Models with Zero Training

EMNLP 2022finding

Visual question answering (VQA) is a hallmark of vision and language reasoningand a challenging task under the zero-shot setting.We propose Plug-and-Play VQA (PNP-VQA),a modular framework for zero-shot VQA.In contrast to most existing works, which require substantial adaptation of pretrained languag…

2021

Align before Fuse: Vision and Language Representation Learning with Momentum Distillation

NeurIPS 2021spotlight

Large-scale vision and language representation learning has shown promising improvements on various vision-language tasks. Most existing methods employ a transformer-based multimodal encoder to jointly model visual tokens (region-based image features) and word tokens. Because the visual tokens and w…

2021

Prototypical Contrastive Learning of Unsupervised Representations

ICLR 2021poster

This paper presents Prototypical Contrastive Learning (PCL), an unsupervised representation learning method that bridges contrastive learning with clustering. PCL not only learns low-level features for the task of instance discrimination, but more importantly, it implicitly encodes semantic structur…

2020

The Devil is in Classification: A Simple Framework for Long-tail Instance Segmentation

ECCV 2020poster

Most existing object instance detection and segmentation models only work well on fairly balanced benchmarks where per-category training sample numbers are comparable, such as COCO. They tend to suffer performance drop on realistic datasets that are usually long-tailed. This work aims to study and a…

2019

Deep Reinforcement Learning in Soft Viscoelastic Actuator of Dielectric Elastomer

RA-L 2019

Dielectric elastomer actuators (DEAs) have been widely employed as artificial muscles in soft robots. Due to material viscoelasticity and nonlinear electromechanical coupling, it is challenging to accurately model a viscoelastic DEA, especially when the actuator is of a complex or irregular configur

Cited by 32SourceScholar
2019

Learning to Detect Human-Object Interactions With Knowledge

CVPR 2019poster

The recent advances in instance-level detection tasks lay a strong foundation for automated visual scenes understanding. However, the ability to fully comprehend a social scene still eludes us. In this work, we focus on detecting human-object interactions (HOIs) in images, an essential step towards…

Cited by 191PDFScholar
2018

Unsupervised Learning of View-invariant Action Representations

NeurIPS 2018poster

The recent success in human action recognition with deep learning methods mostly adopt the supervised learning paradigm, which requires significant amount of manually labeled data to achieve good performance. However, label collection is an expensive and time-consuming process. In this work, we prop…

Cited by 136SourcePDFScholar