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Hang Zhang

60 accepted papers

2026

CLAP: Unsupervised 3D Representation Learning for Fusion 3D Perception via Curvature Sampling and Prototype Learning

ICLR 2026poster

Unsupervised 3D representation learning reduces the burden of labeling multimodal 3D data for fusion perception tasks. Among different pre-training paradigms, differentiable-rendering-based methods have shown most promise. However, existing works separately conduct pre-training for each modalities d…

Cited by 0SourcecodeScholar
2026

Can Protective Watermarking Safeguard the Copyright of 3D Gaussian Splatting?

AAAI 2026technical

3D Gaussian Splatting (3DGS) has emerged as a powerful representation for 3D scenes, widely adopted due to its exceptional efficiency and high-fidelity visual quality. Given the significant value of 3DGS assets, recent works have introduced specialized watermarking schemes to ensure copyright protec

Cited by 0SourcePDFScholar
2026

Color When It Counts: Grayscale-Guided Online Triggering for Always-On Streaming Video Sensing

CVPR 2026

Always-on sensing is essential for next-generation edge/wearable AI systems, yet continuous high-fidelity RGB video capture remains prohibitively expensive for resource-constrained mobile and edge platforms. We present a new paradigm for efficient streaming video understanding: grayscale-always, col

Cited by 0SourcecodeScholar
2026

DeepSight: Long-Horizon World Modeling via Latent States Prediction for End-to-End Autonomous Driving

ICML 2026poster

End-to-end autonomous driving systems are increasingly integrating Vision-Language Model (VLM) architectures, incorporating text reasoning or visual reasoning to enhance the robustness and accuracy of driving decisions. However, the reasoning mechanisms employed in most methods are direct adaptation…

Cited by 0SourceScholar
2026

EagleVision: A Dual-Stage Framework with BEV-grounding-based Chain-of-Thought for Spatial Intelligence

CVPR 2026

Video-based spatial reasoning -- such as estimating distances, judging directions, or understanding layouts from multiple views -- requires selecting informative frames and, when needed, actively seeking additional viewpoints during inference. Existing multimodal large language models (MLLMs) consum

Cited by 0SourceScholar
2026

From Five Dimensions to Many: Large Language Models as Precise and Interpretable Psychological Profilers

ICLR 2026poster

Psychological constructs within individuals are widely believed to be interconnected. We investigated whether and how Large Language Models (LLMs) can model the correlational structure of human psychological traits from minimal quantitative inputs. We prompted various LLMs with Big Five Personality…

Cited by 0SourcecodeScholar
2026

Learning Transferable Temporal Primitives for Video Reasoning via Synthetic Videos

CVPR 2026

The transition from image to video understanding requires vision-language models (VLMs) to shift from recognizing static patterns to reasoning over temporal dynamics such as motion trajectories, speed changes, and state transitions. Yet current post-training methods fall short due to two critical li

Cited by 0SourcecodeScholar
2026

MindDriver: Introducing Progressive Multimodal Reasoning for Autonomous Driving

CVPR 2026

Vision-Language Models (VLM) exhibit strong reasoning capabilities, showing promise for end-to-end autonomous driving systems. Chain-of-Thought (CoT), as VLM's widely used reasoning strategy, is facing critical challenges. Existing textual CoT has a large gap between text semantic space and trajecto

Cited by 0SourcecodeScholar
2026

Multi-level Style Preference Optimization: An Adaptive Detection Framework for Human-Machine Hybrid Text

AAAI 2026technical

Large language model (LLM) generated texts now rival human quality, creating four text categories: purely machine-generated, machine-rewritten, machine-polished, and human-written content. Traditional detection methods face significant challenges in human-machine hybrid scenarios where LLMs perform

Cited by 0SourcePDFScholar
2026

PECHC: Robust Tactile Grasping Stabilization in Vision-Denied Peripersonal Space

IJCAI 2026

In the final “Last-Centimeter” phase of manipulation, visual occlusion and calibration errors often make vision unreliable, causing robots to suffer high failure rates due to local pose uncertainty and deviations between simulated and real-world dynamics. To address these challenges, this paper prop

Cited by 0Scholar
2026

Persistent Autoregressive Mapping with Traffic Rules for Autonomous Driving

AAAI 2026technical

Safe autonomous driving requires both accurate HD map construction and persistent awareness of traffic rules, even when their associated signs are no longer visible. However, existing methods either focus solely on geometric elements or treat rules as temporary classifications, failing to capture th

Cited by 0SourcePDFScholar
2026

Plug-and-Play Clarifier: A Zero-Shot Multimodal Framework for Egocentric Intent Disambiguation

AAAI 2026technical

The performance of egocentric AI agents is fundamentally limited by multimodal intent ambiguity. This challenge arises from a combination of underspecified language, imperfect visual data, and deictic gestures, which frequently leads to task failure. Existing monolithic Vision-Language Models (VLMs)

Cited by 0SourcePDFScholar
2026

SCoNE: Spherical Consistent Neighborhoods Ensemble for Effective and Efficient Multi-View Anomaly Detection

AAAI 2026technical

The core problem in multi-view anomaly detection is to represent local neighborhoods of normal instances consistently across all views. Recent approaches consider a representation of local neighborhood in each view independently, and then capture the consistent neighbors across all views via a learn

Cited by 0SourcePDFScholar
2026

Sat3DGen: Comprehensive Street-Level 3D Scene Generation from Single Satellite Image

ICLR 2026poster

Generating a street-level 3D scene from a single satellite image is a crucial yet challenging task. Current methods present a stark trade-off: geometry-colorization models achieve high geometric fidelity but are typically building-focused and lack semantic diversity. In contrast, proxy-based models…

Cited by 0SourcecodeScholar
2026

Splats in Splats: Robust and Effective 3D Steganography Towards Gaussian Splatting

AAAI 2026technical

3D Gaussian splatting (3DGS) has demonstrated impressive 3D reconstruction performance with explicit scene representations. Given the widespread application of 3DGS in 3D reconstruction and generation tasks, there is an urgent need to protect the copyright of 3DGS assets. However, existing copyright

Cited by 0SourcePDFScholar
2026

UniMapGen: A Generative Framework for Large-Scale Map Construction from Multi-modal Data

AAAI 2026technical

Large-scale map construction is foundational for critical applications such as autonomous driving and navigation systems. Traditional large-scale map construction approaches mainly rely on costly and inefficient special data collection vehicles and labor-intensive annotation processes. While existin

Cited by 0SourcePDFScholar
2025

2.5 Years in Class: A Multimodal Textbook for Vision-Language Pretraining

ICCV 2025poster

Compared to image-text pair data, interleaved corpora enable Vision-Language Models (VLMs) to understand the world more naturally like humans. However, such existing datasets are crawled from webpage, facing challenges like low knowledge density, loose image-text relations, and poor logical coherenc…

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

GraphProt: Certified Black-Box Shielding Against Backdoored Graph Models

IJCAI 2025

Graph learning models have been empirically proven to be vulnerable to backdoor threats, wherein adversaries submit trigger-embedded inputs to manipulate the model predictions. Current graph backdoor defenses manifest several limitations: 1) dependence on model-related details, 2) necessitation of a

Cited by 0SourcePDFScholar
2025

OmniBind: Large-scale Omni Multimodal Representation via Binding Spaces

ICLR 2025poster

Recently, human-computer interaction with various modalities has shown promising applications, like GPT-4o and Gemini. Meanwhile, multimodal representation models have emerged as the foundation for these versatile multimodal understanding and generation pipeline. Models like CLIP, CLAP and ImageBind…

Cited by 11SourcePDFScholar
2025

Temporal-aware Query Routing for Real-time Video Instance Segmentation

ICCV 2025poster

With the rise of applications such as embodied intelligence, developing high real-time online video instance segmentation (VIS) has become increasingly important. However, through time profiling of the components in advanced online VIS architecture (i.e., transformer-based architecture), we find tha…

Cited by 0SourcePDFScholar
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
2025

VideoRefer Suite: Advancing Spatial-Temporal Object Understanding with Video LLM

CVPR 2025poster

Video Large Language Models (Video LLMs) have recently exhibited remarkable capabilities in general video understanding.However, they mainly focus on holistic comprehension and struggle with capturing fine-grained spatial and temporal details. Besides, the lack of high-quality object-level video ins…

2025

XFormParser: A Simple and Effective Multimodal Multilingual Semi-structured Form Parser

COLING 2025main

In the domain of Document AI, parsing semi-structured image form is a crucial Key Information Extraction (KIE) task. The advent of pre-trained multimodal models significantly empowers Document AI frameworks to extract key information from form documents in different formats such as PDF, Word, and im…

2024

APOLLO: An Optimized Training Approach for Long-form Numerical Reasoning

COLING 2024main

Long-form numerical reasoning aims to generate a reasoning program to calculate the answer for a given question. Previous work followed a retriever-generator framework, where the retriever selects key facts from a long-form document, and the generator generates a reasoning program based on the retri…

2024

AnnoLLM: Making Large Language Models to Be Better Crowdsourced Annotators

NAACL 2024industry

Many natural language processing (NLP) tasks rely on labeled data to train machine learning models with high performance. However, data annotation is time-consuming and expensive, especially when the task involves a large amount of data or requires specialized domains. Recently, GPT-3.5 series model…

2024

Boosting Textural NER with Synthetic Image and Instructive Alignment

ACL 2024findings

Named entity recognition (NER) is a pivotal task reliant on textual data, often impeding the disambiguation of entities due to the absence of context. To tackle this challenge, conventional methods often incorporate images crawled from the internet as auxiliary information. However, the images often…

2024

Empowering and Assessing the Utility of Large Language Models in Crop Science

NeurIPS 2024poster

Large language models (LLMs) have demonstrated remarkable efficacy across knowledge-intensive tasks. Nevertheless, their untapped potential in crop science presents an opportunity for advancement. To narrow this gap, we introduce CROP, which includes a novel instruction tuning dataset specifically d…

Cited by 1SourcePDFScholar
2024

Knowledge Enhanced Pre-training for Cross-lingual Dense Retrieval

COLING 2024main

In recent years, multilingual pre-trained language models (mPLMs) have achieved significant progress in cross-lingual dense retrieval. However, most mPLMs neglect the importance of knowledge. Knowledge always conveys similar semantic concepts in a language-agnostic manner, while query-passage pairs…

Cited by 0SourcePDFScholar
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
2024

SeaLLMs - Large Language Models for Southeast Asia

ACL 2024system demonstrations

Despite the remarkable achievements of large language models (LLMs) in various tasks, there remains a linguistic bias that favors high-resource languages, such as English, often at the expense of low-resource and regional languages. To address this imbalance, we introduce SeaLLMs, an innovative seri…

2024

Stabilize the Latent Space for Image Autoregressive Modeling: A Unified Perspective

NeurIPS 2024poster

Latent-based image generative models, such as Latent Diffusion Models (LDMs) and Mask Image Models (MIMs), have achieved notable success in image generation tasks. These models typically leverage reconstructive autoencoders like VQGAN or VAE to encode pixels into a more compact latent space and lear…

2023

CAPSTONE: Curriculum Sampling for Dense Retrieval with Document Expansion

EMNLP 2023long main

The dual-encoder has become the de facto architecture for dense retrieval. Typically, it computes the latent representations of the query and document independently, thus failing to fully capture the interactions between the query and document. To alleviate this, recent research has focused on obta…

Cited by 0SourcecodeScholar
2023

Noisy Pair Corrector for Dense Retrieval

EMNLP 2023long findings

Most dense retrieval models contain an implicit assumption: the training query-document pairs are exactly matched. Since it is expensive to annotate the corpus manually, training pairs in real-world applications are usually collected automatically, which inevitably introduces mismatched-pair noise.…

Cited by 0SourceScholar
2023

Open-Vocabulary Semantic Segmentation With Mask-Adapted CLIP

CVPR 2023poster

Open-vocabulary semantic segmentation aims to segment an image into semantic regions according to text descriptions, which may not have been seen during training. Recent two-stage methods first generate class-agnostic mask proposals and then leverage pre-trained vision-language models, e.g., CLIP, t…

2023

Spatially Covariant Lesion Segmentation

IJCAI 2023poster

Compared to natural images, medical images usually show stronger visual patterns and therefore this adds flexibility and elasticity to resource-limited clinical applications by injecting proper priors into neural networks. In this paper, we propose spatially covariant pixel-aligned classifier (SCP)…

Cited by 9SourcePDFScholar
2023

Towards a Persistence Diagram that is Robust to Noise and Varied Densities

ICML 2023poster

Recent works have identified that existing methods, which construct persistence diagrams in Topological Data Analysis (TDA), are not robust to noise and varied densities in a point cloud. We analyze the necessary properties of an approach that can address these two issues, and propose a new filter f…

Cited by 1SourcePDFScholar
2022

Adversarial Retriever-Ranker for Dense Text Retrieval

ICLR 2022poster

Current dense text retrieval models face two typical challenges. First, it adopts a siamese dual-encoder architecture to encode query and document independently for fast indexing and searching, whereas neglecting the finer-grained term-wise interactions. This results in a sub-optimal recall performa…

2022

CodeRetriever: A Large Scale Contrastive Pre-Training Method for Code Search

EMNLP 2022main

In this paper, we propose the CodeRetriever model, which learns the function-level code semantic representations through large-scale code-text contrastive pre-training. We adopt two contrastive learning schemes in CodeRetriever: unimodal contrastive learning and bimodal contrastive learning. For uni…

2022

Metric-guided Distillation: Distilling Knowledge from the Metric to Ranker and Retriever for Generative Commonsense Reasoning

EMNLP 2022main

Commonsense generation aims to generate a realistic sentence describing a daily scene under the given concepts, which is very challenging, since it requires models to have relational reasoning and compositional generalization capabilities. Previous work focuses on retrieving prototype sentences for…

2022

Sentiment-Aware Word and Sentence Level Pre-training for Sentiment Analysis

EMNLP 2022main

Most existing pre-trained language representation models (PLMs) are sub-optimal in sentiment analysis tasks, as they capture the sentiment information from word-level while under-considering sentence-level information. In this paper, we propose SentiWSP, a novel Sentiment-aware pre-trained language…

2021

A Bi-Directional LSTM Network for Estimating Continuous Upper Limb Movement From Surface Electromyography

RA-L 2021

In human-machine interaction systems, continuous movement estimation methods occupy an important position because they are more natural and intuitive than pattern-recognition methods. Essentially, arm position is decided by the shoulder and elbow joint angles. However, the various deformations of mu

Cited by 74SourceScholar
2021

A Novel and Efficient Feature Extraction Method for Deep Learning Based Continuous Estimation

RA-L 2021

Simultaneous and proportional control (SPC) methods based on surface electromyogram (sEMG) can provide a more intuitive and natural interaction in rehabilitation assistive robots and prostheses. Recently, an increasing number of researchers have utilized deep learning methods to continuously estimat

Cited by 27SourceScholar
2021

Efficient Folded Attention for Medical Image Reconstruction and Segmentation

AAAI 2021technical

Recently, 3D medical image reconstruction (MIR) and segmentation (MIS) based on deep neural networks have been developed with promising results, and attention mechanism has been further designed for performance enhancement. However, the large size of 3D volume images poses a great computational chal…

2021

Poolingformer: Long Document Modeling with Pooling Attention

ICML 2021spotlight

In this paper, we introduce a two-level attention schema, Poolingformer, for long document modeling. Its first level uses a smaller sliding window pattern to aggregate information from neighbors. Its second level employs a larger window to increase receptive fields with pooling attention to reduce b…

2019

Bag of Tricks for Image Classification with Convolutional Neural Networks

CVPR 2019poster

Much of the recent progress made in image classification research can be credited to training procedure refinements, such as changes in data augmentations and optimization methods. In the literature, however, most refinements are either briefly mentioned as implementation details or only visible in…

Cited by 2019PDFcodeScholar
2018

Context Encoding for Semantic Segmentation

CVPR 2018poster

Recent work has made significant progress in improving spatial resolution for pixelwise labeling with Fully Convolutional Network (FCN) framework by employing Dilated/Atrous convolution, utilizing multi-scale features and refining boundaries. In this paper, we explore the impact of global contextua…