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Ke Chen

70 accepted papers

2026

AffIn-Space: Learning Affine-Invariant Representations for 3D Spatial Understanding with MLLMs

ICML 2026poster

While Multimodal Large Language Models (MLLMs) have achieved remarkable progress in general visual understanding, they suffer from a fundamental geometric fragility: standard visual representations often degrade rapidly under changes in viewpoint and viewing distance. Our analysis identifies that ex…

Cited by 0SourceScholar
2026

CASL: Curvature-Augmented Self-supervised Learning for 3D Anomaly Detection

AAAI 2026technical

Deep learning-based 3D anomaly detection methods have demonstrated significant potential in industrial manufacturing. However, many approaches are specifically designed for anomaly detection tasks, which limits their generalizability to other 3D tasks. In contrast, self-supervised point cloud models

Cited by 0SourcePDFScholar
2026

CVSearch: Empowering Multimodal LLMs with Cognitive Visual Search for High-Resolution Image Perception

ICML 2026poster

High-resolution (HR) image perception presents a key bottleneck for multimodal large language models (MLLMs). While visual search offers a promising solution, existing methods struggle with the trade-off between coverage and efficiency. Visual expert-assisted search is efficient but prone to blind s…

Cited by 0SourceScholar
2026

CoPRS: Learning Positional Prior from Chain-of-Thought for Reasoning Segmentation

ICLR 2026poster

Existing works on reasoning segmentation either connect hidden features from a language model directly to a mask decoder or represent positions in text, which limits interpretability and semantic detail. To solve this, we present CoPRS, a Multi-modal Chain-of-Thought (MCoT)–based positional percepti…

Cited by 0SourceScholar
2026

HiLoRA: Hierarchical Low-Rank Adaptation for Personalized Federated Learning

CVPR 2026

Vision Transformers (ViTs) have been widely adopted in vision tasks due to their strong transferability. In Federated Learning (FL), where full fine-tuning is communication-heavy, Low-Rank Adaptation (LoRA) provides an efficient and communication-friendly way to adapt ViTs. However, existing LoRA-ba

Cited by 0SourceScholar
2026

MemoVAD: Resource-Efficient Video Anomaly Detection via Dynamic Semantic Memory in Edge Computing Scenarios

IJCAI 2026

Deploying Video Anomaly Detection (VAD) in real-world surveillance faces a fundamental tension between the demand for high-level semantics to ensure effectiveness and the limited computational resources of edge devices. Vision–Language Models (VLMs) provide rich open-vocabulary semantics, but their

Cited by 1Scholar
2026

PROMPTSEP: GENERATIVE AUDIO SEPARATION VIA MULTIMODAL PROMPTING

ICASSP 2026oral

Recent breakthroughs in language-queried audio source separation (LASS) have shown that generative models can achieve higher separation audio quality than traditional masking-based approaches. However, two key limitations restrict their practical use: (1) users often require operations beyond separa…

Cited by 0SourcePDFScholar
2026

Revisiting Uncertainty: On Evidential Learning for Partially Relevant Video Retrieval

ICML 2026poster

Partially relevant video retrieval aims to retrieve untrimmed videos using text queries that describe only partial content. However, the inherent asymmetry between brief queries and rich video content inevitably introduces uncertainty into the retrieval process. In this setting, vague queries often …

Cited by 0SourceScholar
2026

Saliency-Guided Representation with Consistency Policy Learning for Visual Unsupervised Reinforcement Learning

CVPR 2026

Zero-shot unsupervised reinforcement learning (URL) offers a promising direction for building generalist agents capable of generalizing to unseen tasks without additional supervision. Among existing approaches, successor representations (SR) have emerged as a prominent paradigm due to their effectiv

Cited by 0SourcecodeScholar
2026

Scaling Transformers for End-to-End Discrete Audio Tokenization

ICML 2026poster

Discrete audio tokenizers are fundamental to empowering large language models with native audio processing and generation capabilities. Despite recent progress, existing approaches often rely on pretrained encoders, semantic distillation, or heterogeneous CNN-based architectures. These designs intro…

Cited by 0SourceScholar
2026

SegCompass: Exploring Interpretable Alignment with Sparse Autoencoders for Enhanced Reasoning Segmentation

CVPR 2026

While large language models provide strong compositional reasoning, existing reasoning segmentation pipelines fail to transparently connect this reasoning to visual perception. Current methods, such as latent query alignment, are end-to-end yet opaque "black boxes". Conversely, textual localization

Cited by 0SourcecodeScholar
2026

SpeechOp: Inference-Time Task Composition for Generative Speech Processing

ICLR 2026poster

While generative Text-to-Speech (TTS) systems leverage vast "in-the-wild" data to achieve remarkable success, speech-to-speech processing tasks like enhancement face data limitations, which lead data-hungry generative approaches to distort speech content and speaker identity. To bridge this gap, we…

Cited by 0SourceScholar
2026

Towards True Speech-to-Speech Models Without Text Guidance

ICLR 2026poster

Spoken dialogue systems often rely on cascaded pipelines that transcribe, process, and resynthesize speech. While effective, this design discards paralinguistic cues and limits expressivity. Recent end-to-end methods reduce latency and better preserve these cues, yet still rely on text intermediates…

Cited by 0SourcecodeScholar
2026

UAV-CB: A Complex-Background RGB-T Dataset and Local Frequency Bridge Network for UAV Detection

CVPR 2026

Detecting Unmanned Aerial Vehicles (UAVs) in low-altitude environments is essential for perception and defense systems but remains highly challenging due to complex backgrounds, camouflage, and multimodal interference. In real-world scenarios, UAVs are frequently visually blended with surrounding st

Cited by 0SourcecodeScholar
2025

Adapting Pre-trained 3D Models for Point Cloud Video Understanding via Cross-frame Spatio-temporal Perception

CVPR 2025poster

Point cloud video understanding is becoming increasingly important in fields such as robotics, autonomous driving, and augmented reality, as they can accurately represent object motion and environmental changes. Despite the progress made in self-supervised learning methods for point cloud video unde…

2025

AllGCD: Leveraging All Unlabeled Data for Generalized Category Discovery

ICCV 2025poster

Generalized Category Discovery (GCD) aims to identify both known and novel categories in unlabeled data by leveraging knowledge from labeled datasets. Current methods employ supervised contrastive learning on labeled data to capture known category structures but neglect unlabeled data, limiting thei…

Cited by 0SourcePDFScholar
2025

CogSQL: A Cognitive Framework for Enhancing Large Language Models in Text-to-SQL Translation

AAAI 2025technical

Large language models (LLMs) have significantly advanced the performance of various natural language processing tasks, including text-to-SQL. Current LLM-based text-to-SQL schemes mainly focus on improving the understanding of natural language questions (NLQs) or refining the quality of generated SQ…

2025

FLAM: Frame-Wise Language-Audio Modeling

ICML 2025poster

Recent multi-modal audio-language models (ALMs) excel at text-audio retrieval but struggle with frame-wise audio understanding. Prior works use temporal-aware labels or unsupervised training to improve frame-wise capabilities, but they still lack fine-grained labeling capability to pinpoint when an…

Cited by 0SourcePDFScholar
2025

FloE: On-the-Fly MoE Inference on Memory-constrained GPU

ICML 2025poster

With the widespread adoption of Mixture-of-Experts (MoE) models, there is a growing demand for efficient inference on memory-constrained devices. While offloading expert parameters to CPU memory and loading activated experts on demand has emerged as a potential solution, the large size of activated…

Cited by 0SourcePDFScholar
2025

GSPN-2: Efficient Parallel Sequence Modeling

NeurIPS 2025poster

Efficient vision transformer remains a bottleneck for high-resolution images and long-video related real-world applications. Generalized Spatial Propagation Network (GSPN) \cite{wang2025parallel} addresses this by replacing quadratic self-attention with a line-scan propagation scheme, bringing the c…

Cited by 0SourceScholar
2025

In-Dataset Trajectory Return Regularization for Offline Preference-based Reinforcement Learning

AAAI 2025technical

Offline preference-based reinforcement learning (PbRL) typically operates in two phases: first, use human preferences to learn a reward model and annotate rewards for a reward-free offline dataset; second, learn a policy by optimizing the learned reward via offline RL. However, accurately modeling s…

2025

PMA: Towards Parameter-Efficient Point Cloud Understanding via Point Mamba Adapter

CVPR 2025poster

Applying pre-trained models to assist point cloud understanding has recently become a mainstream paradigm in 3D perception. However, existing application strategies are straightforward, utilizing only the final output of the pre-trained model for various task heads. It neglects the rich complementar…

2025

Point Cloud Mixture-of-Domain-Experts Model for 3D Self-supervised Learning

IJCAI 2025

Point clouds, as a primary representation of 3D data, can be categorized into scene domain point clouds and object domain point clouds. Point cloud self-supervised learning (SSL) has become a mainstream paradigm for learning 3D representations. However, existing point cloud SSL primarily focuses on

Cited by 0SourcePDFScholar
2025

Train Small, Infer Large: Memory-Efficient LoRA Training for Large Language Models

ICLR 2025poster

Large Language Models (LLMs) have significantly advanced natural language processing with exceptional task generalization capabilities. Low-Rank Adaption (LoRA) offers a cost-effective fine-tuning solution, freezing the original model parameters and training only lightweight, low-rank adapter matric…

2025

Ultrasound-Guided Robotic Blood Drawing and In Vivo Studies on Submillimetre Vessels of Rats

ICRA 2025

Billions of vascular access procedures are performed annually worldwide, serving as a crucial first step in various clinical diagnostic and therapeutic procedures. For pediatric or elderly individuals, whose vessels are small in size (typically 2 to 3 mm in diameter for adults and <1 mm in children)

Cited by 2SourceScholar
2025

Unsupervised Zero-Shot Reinforcement Learning via Dual-Value Forward-Backward Representation

ICLR 2025poster

Online unsupervised reinforcement learning (URL) can discover diverse skills via reward-free pre-training and exhibits impressive downstream task adaptation abilities through further fine-tuning. However, online URL methods face challenges in achieving zero-shot generalization, i.e., directly applyi…

Cited by 0SourcePDFScholar
2025

kNN-SVC: Robust Zero-Shot Singing Voice Conversion with Additive Synthesis and Concatenation Smoothness Optimization

ICASSP 2025accepted

Robustness is critical in zero-shot singing voice conversion (SVC). This paper introduces two novel methods to strengthen the robustness of the kNN-VC framework for SVC. First, kNN-VC’s core representation, WavLM, lacks harmonic emphasis, resulting in dull sounds and ringing artifacts. To address th…

Cited by 0SourceScholar
2024

CARAT: Contrastive Feature Reconstruction and Aggregation for Multi-Modal Multi-Label Emotion Recognition

AAAI 2024technical

Multi-modal multi-label emotion recognition (MMER) aims to identify relevant emotions from multiple modalities. The challenge of MMER is how to effectively capture discriminative features for multiple labels from heterogeneous data. Recent studies are mainly devoted to exploring various fusion strat…

2024

Draft & Verify: Lossless Large Language Model Acceleration via Self-Speculative Decoding

ACL 2024long

We present a novel inference scheme, self-speculative decoding, for accelerating Large Language Models (LLMs) without the need for an auxiliary model. This approach is characterized by a two-stage process: drafting and verification. The drafting stage generates draft tokens at a slightly lower quali…

2024

MDX-GAN: Enhancing Perceptual Quality in Multi-Class Source Separation Via Adversarial Training

ICASSP 2024accepted

Audio source separation aims to extract individual sound sources from an audio mixture. Recent studies on source separation focus primarily on minimizing signal-level distance, typically measured by source-to-distortion ratio (SDR). However, scant attention has been given to the perceptual quality o…

Cited by 0SourceScholar
2024

MusicLDM: Enhancing Novelty in text-to-music Generation Using Beat-Synchronous mixup Strategies

ICASSP 2024accepted

Diffusion models have shown promising results in cross-modal generation tasks, including text-to-image and text-to-audio generation. However, generating music, as a special type of audio, presents unique challenges due to limited availability of music data and sensitive issues related to copyright a…

Cited by 0SourceScholar
2024

Retrieval Guided Music Captioning via Multimodal Prefixes

IJCAI 2024poster

In this paper we put forward a new approach to music captioning, the task of automatically generating natural language descriptions for songs. These descriptions are useful both for categorization and analysis, and also from an accessibility standpoint as they form an important component of closed c…

2024

Variational Hybrid-Attention Framework for Multi-Label Few-Shot Aspect Category Detection

AAAI 2024technical

Multi-label few-shot aspect category detection (FS-ACD) is a challenging sentiment analysis task, which aims to learn a multi-label learning paradigm with limited training data. The difficulty of this task is how to use limited data to generalize effective discriminative representations for differen…

2023

Deep Partial Multi-Label Learning with Graph Disambiguation

IJCAI 2023poster

In partial multi-label learning (PML), each data example is equipped with a candidate label set, which consists of multiple ground-truth labels and other false-positive labels. Recently, graph-based methods, which demonstrate a good ability to estimate accurate confidence scores from candidate label…

Cited by 10SourcePDFScholar
2023

Effective Continual Learning for Text Classification with Lightweight Snapshots

AAAI 2023technical

Continual learning is known for suffering from catastrophic forgetting, a phenomenon where previously learned concepts are forgotten upon learning new tasks. A natural remedy is to use trained models for old tasks as ‘teachers’ to regularize the update of the current model to prevent such forgetting…

2023

FedBFPT: An Efficient Federated Learning Framework for Bert Further Pre-training

IJCAI 2023poster

This study proposes FEDBFPT (Federated BERT Further Pre-Training), a Federated Learning (FL) framework for further pre-training the BERT language model in specialized domains while addressing privacy concerns. FEDBFPT enables multiple clients to collaboratively train the shallower layers of BERT, wh…

2023

Large-Scale Contrastive Language-Audio Pretraining with Feature Fusion and Keyword-to-Caption Augmentation

ICASSP 2023accepted

Contrastive learning has shown remarkable success in the field of multimodal representation learning. In this paper, we propose a pipeline of contrastive language-audio pretraining to develop an audio representation by combining audio data with natural language descriptions. To accomplish this targe…

Cited by 0SourceScholar
2023

Manifold-Aware Self-Training for Unsupervised Domain Adaptation on Regressing 6D Object Pose

IJCAI 2023poster

Domain gap between synthetic and real data in visual regression (e.g., 6D pose estimation) is bridged in this paper via global feature alignment and local refinement on the coarse classification of discretized anchor classes in target space, which imposes a piece-wise target manifold regularization…

2023

NVRadarNet: Real-Time Radar Obstacle and Free Space Detection for Autonomous Driving

ICRA 2023poster

Detecting obstacles is crucial for safe and efficient autonomous driving. To this end, we present NVRadarNet, a deep neural network (DNN) that detects dynamic obstacles and drivable free space using automotive RADAR sensors. The network utilizes temporally accumulated data from multiple RADAR sensor…

Cited by 34SourceScholar
2023

Quality-Aware Self-Training on Differentiable Synthesis of Rare Relational Data

AAAI 2023technical

Data scarcity is a very common real-world problem that poses a major challenge to data-driven analytics. Although a lot of data-balancing approaches have been proposed to mitigate this problem, they may drop some useful information or fall into the overfitting problem. Generative Adversarial Networ…

2023

Weakly Supervised Segmentation With Point Annotations for Histopathology Images via Contrast-Based Variational Model

CVPR 2023poster

Image segmentation is a fundamental task in the field of imaging and vision. Supervised deep learning for segmentation has achieved unparalleled success when sufficient training data with annotated labels are available. However, annotation is known to be expensive to obtain, especially for histopath…

2022

BiCo-Net: Regress Globally, Match Locally for Robust 6D Pose Estimation

IJCAI 2022poster

The challenges of learning a robust 6D pose function lie in 1) severe occlusion and 2) systematic noises in depth images. Inspired by the success of point-pair features, the goal of this paper is to recover the 6D pose of an object instance segmented from RGB-D images by locally matching pairs of or…

2022

Bytecover2: Towards Dimensionality Reduction of Latent Embedding for Efficient Cover Song Identification

ICASSP 2022accepted

Convolutional neural network (CNN)-based methods have dominated the recent research of cover song identification (CSI). A typical example is the ByteCover system we proposed, which has achieved state-of-the-art results on all the mainstream datasets of CSI. In this paper, we propose an up-graded ver…

Cited by 0SourceScholar
2022

Continual Federated Learning Based on Knowledge Distillation

IJCAI 2022poster

Federated learning (FL) is a promising approach for learning a shared global model on decentralized data owned by multiple clients without exposing their privacy. In real-world scenarios, data accumulated at the client-side varies in distribution over time. As a consequence, the global model tends t…

Cited by 86SourcePDFScholar
2022

Fine-Grained Object Classification via Self-Supervised Pose Alignment

CVPR 2022poster

Semantic patterns of fine-grained objects are determined by subtle appearance difference of local parts, which thus inspires a number of part-based methods. However, due to uncontrollable object poses in images, distinctive details carried by local regions can be spatially distributed or even self-o…

Cited by 78PDFcodeScholar
2022

HTS-AT: A Hierarchical Token-Semantic Audio Transformer for Sound Classification and Detection

ICASSP 2022accepted

Audio classification is an important task of mapping audio samples into their corresponding labels. Recently, the transformer model with self-attention mechanisms has been adopted in this field. However, existing audio transformers require large GPU memories and long training time, meanwhile relying…

Cited by 0SourceScholar
2022

Quasi-Balanced Self-Training on Noise-Aware Synthesis of Object Point Clouds for Closing Domain Gap

ECCV 2022poster

"Semantic analyses of object point clouds are largely driven by releasing of benchmarking datasets, including synthetic ones whose instances are sampled from object CAD models. However, learning from synthetic data may not generalize to practical scenarios, where point clouds are typically incomplet…

2022

SkipBERT: Efficient Inference with Shallow Layer Skipping

ACL 2022long

In this paper, we propose SkipBERT to accelerate BERT inference by skipping the computation of shallow layers. To achieve this, our approach encodes small text chunks into independent representations, which are then materialized to approximate the shallow representation of BERT. Since the use of suc…

2022

Tonet: Tone-Octave Network for Singing Melody Extraction from Polyphonic Music

ICASSP 2022accepted

Singing melody extraction is an important problem in the field of music information retrieval. Existing methods typically rely on frequency-domain representations to estimate the sung frequencies. However, this design does not lead to human-level performance in the perception of melody information f…

Cited by 0SourceScholar
2022

Zero-Shot Audio Source Separation through Query-Based Learning from Weakly-Labeled Data

AAAI 2022technical

Deep learning techniques for separating audio into different sound sources face several challenges. Standard architectures require training separate models for different types of audio sources. Although some universal separators employ a single model to target multiple sources, they have difficulty…

2021

3D AffordanceNet: A Benchmark for Visual Object Affordance Understanding

CVPR 2021poster

The ability to understand the ways to interact with objects from visual cues, a.k.a. visual affordance, is essential to vision-guided robotic research. This involves categorizing, segmenting and reasoning of visual affordance. Relevant studies in 2D and 2.5D image domains have been made previously,…

Cited by 136PDFcodeScholar
2021

Balance Control of a Novel Wheel-legged Robot: Design and Experiments

ICRA 2021poster

This paper presents a balance control technique for a novel wheel-legged robot. We first derive a dynamic model of the robot and then apply a linear feedback controller based on output regulation and linear quadratic regulator (LQR) methods to maintain the standing of the robot on the ground without…

Cited by 94SourceScholar
2021

Effective Slot Filling via Weakly-Supervised Dual-Model Learning

AAAI 2021technical

Slot filling is a challenging task in Spoken Language Understanding (SLU). Supervised methods usually require large amounts of annotation to maintain desirable performance. A solution to relieve the heavy dependency on labeled data is to employ bootstrapping, which leverages unlabeled data. However,…

2021

Geometry-Aware Self-Training for Unsupervised Domain Adaptation on Object Point Clouds

ICCV 2021poster

The point cloud representation of an object can have a large geometric variation in view of inconsistent data acquisition procedure, which thus leads to domain discrepancy due to diverse and uncontrollable shape representation cross datasets. To improve discrimination on unseen distribution of point…

Cited by 82PDFcodeScholar
2021

Learning Audio Embeddings with User Listening Data for Content-Based Music Recommendation

ICASSP 2021accepted

Personalized recommendation on new track releases has always been a challenging problem in the music industry. To combat this problem, we first explore user listening history and demographics to construct a user embedding representing the user’s music preference. With the user embedding and audio da…

Cited by 0SourceScholar
2021

Real-Time Vanishing Point Detector Integrating Under-Parameterized RANSAC and Hough Transform

ICCV 2021poster

We propose a novel approach that integrates under-parameterized RANSAC (UPRANSAC) with Hough Transform to detect vanishing points (VPs) from un-calibrated monocular images. In our algorithm, the UPRANSAC chooses one hypothetical inlier in a sample set to find a portion of the VP's degrees of freedom…

Cited by 13PDFScholar
2021

Sparse Steerable Convolutions: An Efficient Learning of SE(3)-Equivariant Features for Estimation and Tracking of Object Poses in 3D Space

NeurIPS 2021poster

As a basic component of SE(3)-equivariant deep feature learning, steerable convolution has recently demonstrated its advantages for 3D semantic analysis. The advantages are, however, brought by expensive computations on dense, volumetric data, which prevent its practical use for efficient processing…

2020

MVLidarNet: Real-Time Multi-Class Scene Understanding for Autonomous Driving Using Multiple Views

IROS 2020poster

Autonomous driving requires the inference of actionable information such as detecting and classifying objects, and determining the drivable space. To this end, we present Multi-View LidarNet (MVLidarNet), a two-stage deep neural network for multi-class object detection and drivable space segmentatio…

Cited by 39SourceScholar
2019

Structured Knowledge Distillation for Semantic Segmentation

CVPR 2019oral

In this paper, we investigate the issue of knowledge distillation for training compact semantic segmentation networks by making use of cumbersome networks. We start from the straightforward scheme, pixel-wise distillation, which applies the distillation scheme originally introduced for image classif…

Cited by 929PDFScholar
2019

Transferable Positive/negative Speech Emotion Recognition via Class-wise Adversarial Domain Adaptation

ICASSP 2019accepted

Speech emotion recognition plays an important role in building more intelligent and human-like agents. Due to the difficulty of collecting speech emotional data, an increasingly popular solution is leveraging a related and rich source corpus to help address the target corpus. However, domain shift b…

Cited by 0SourceScholar
2018

Intervention Aided Reinforcement Learning for Safe and Practical Policy Optimization in Navigation

CoRL 2018

Combining deep neural networks with reinforcement learning has shown great potential in the next-generation intelligent control. However, there are challenges in terms of safety and cost in practical applications. In this pa- per, we propose the Intervention Aided Reinforcement Learning (IARL) frame

2015

Unsupervised Visual Alignment With Similarity Graphs

CVPR 2015poster

Alignment of semantically meaningful visual patterns, such as object classes, is an important pre-processing step for a number of applications such as object detection and image categorization. Considering the expensive manpower spent on the annotation of supervised alignment methods, unsupervised…

Cited by 17SourcePDFScholar