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Hubert P. H. Shum

9 accepted papers

2026

ViTE: Virtual Graph Trajectory Expert Router for Pedestrian Trajectory Prediction

AAAI 2026technical

Pedestrian trajectory prediction is critical for ensuring safety in autonomous driving, surveillance systems, and urban planning applications. While early approaches primarily focus on one-hop pairwise relationships, recent studies attempt to capture high-order interactions by stacking multiple Grap

Cited by 0SourcePDFScholar
2024

MAGR: Manifold-Aligned Graph Regularization for Continual Action Quality Assessment

ECCV 2024oral

"Action Quality Assessment (AQA) evaluates diverse skills but models struggle with non-stationary data. We propose Continual AQA (CAQA) to refine models using sparse new data. Feature replay preserves memory without storing raw inputs. However, the misalignment between static old features and the dy…

2024

RAPiD-Seg: Range-Aware Pointwise Distance Distribution Networks for 3D LiDAR Segmentation

ECCV 2024oral

"[-4] 3D point clouds play a pivotal role in outdoor scene perception, especially in the context of autonomous driving. Recent advancements in 3D LiDAR segmentation often focus intensely on the spatial positioning and distribution of points for accurate segmentation. However, these methods, while ro…

2024

Self-Regulated Sample Diversity in Large Language Models

NAACL 2024findings

Sample diversity depends on the task; within mathematics, precision and determinism are paramount, while storytelling thrives on creativity and surprise. This paper presents a simple self-regulating approach where we adjust sample diversity inference parameters dynamically based on the input prompt—…

Cited by 0SourcePDFScholar
2023

Hard No-Box Adversarial Attack on Skeleton-Based Human Action Recognition with Skeleton-Motion-Informed Gradient

ICCV 2023poster

Recently, methods for skeleton-based human activity recognition have been shown to be vulnerable to adversarial attacks. However, these attack methods require either the full knowledge of the victim (i.e. white-box attacks), access to training data (i.e. transfer-based attacks) or frequent model que…

Cited by 17PDFcodeScholar
2023

Less Is More: Reducing Task and Model Complexity for 3D Point Cloud Semantic Segmentation

CVPR 2023poster

Whilst the availability of 3D LiDAR point cloud data has significantly grown in recent years, annotation remains expensive and time-consuming, leading to a demand for semi-supervised semantic segmentation methods with application domains such as autonomous driving. Existing work very often employs r…

2023

Unaligned 2D to 3D Translation with Conditional Vector-Quantized Code Diffusion using Transformers

ICCV 2023poster

Generating 3D images of complex objects conditionally from a few 2D views is a difficult synthesis problem, compounded by issues such as domain gap and geometric misalignment. For instance, a unified framework such as Generative Adversarial Networks cannot achieve this unless they explicitly define…

Cited by 7PDFcodeScholar
2022

Geometric Features Informed Multi-Person Human-Object Interaction Recognition in Videos

ECCV 2022poster

"Human-Object Interaction (HOI) recognition in videos is important for analyzing human activity. Most existing work focusing on visual features usually suffer from occlusion in the real-world scenarios. Such a problem will be further complicated when multiple people and objects are involved in HOIs.…

2016

Arbitrary view action recognition via transfer dictionary learning on synthetic training data

ICRA 2016

Human action recognition is an important problem in robotic vision. Traditional recognition algorithms usually require the knowledge of view angle, which is not always available in robotic applications such as active vision. In this paper, we propose a new framework to recognize actions with arbitra

Cited by 10SourceScholar