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Tianhang Xiang

4 accepted papers

2026

Action-and-object Aware Alignment for Partially Relevant Video Retrieval

AAAI 2026technical

Partially Relevant Video Retrieval (PRVR) aims to retrieve untrimmed videos containing relevant moments for a given text query. This task is extremely challenging, as untrimmed videos often include numerous actions and objects unrelated to the query. However, existing methods usually struggle with f

Cited by 0SourcePDFScholar
2026

FAM: Fine-Grained Alignment Matters in Multimodal Embedding Learning with Large Vision-Language Models

AAAI 2026technical

Learning multimodal representation is a fundamental task that supports a wide range of applications such as visual-text retrieval. While pioneering approaches e.g., CLIP paves the way by learning separated encoders for different modalities, they struggle to model complex interactions between modalit

Cited by 0SourcePDFScholar
2025

LSceneLLM: Enhancing Large 3D Scene Understanding Using Adaptive Visual Preferences

CVPR 2025poster

Research on 3D Vision-Language Models (3D-VLMs) is gaining increasing attention, which is crucial for developing embodied AI within 3D scenes, such as visual navigation and embodied question answering. Due to the high density of visual features, especially in large 3D scenes, accurately locating tas…

2023

CPCM: Contextual Point Cloud Modeling for Weakly-supervised Point Cloud Semantic Segmentation

ICCV 2023poster

We study the task of weakly-supervised point cloud semantic segmentation with sparse annotations (e.g., less than 0.1% points are labeled), aiming to reduce the expensive cost of dense annotations. Unfortunately, with extremely sparse annotated points, it is very difficult to extract both contextual…

Cited by 32PDFcodeScholar