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Zichuan Xu

6 accepted papers

2024

Fewer Steps, Better Performance: Efficient Cross-Modal Clip Trimming for Video Moment Retrieval Using Language

AAAI 2024technical

Given an untrimmed video and a sentence query, video moment retrieval using language (VMR) aims to locate a target query-relevant moment. Since the untrimmed video is overlong, almost all existing VMR methods first sparsely down-sample each untrimmed video into multiple fixed-length video clips and…

Cited by 19Source ↗PDF ↗Scholar ↗
2022

Memory-Guided Semantic Learning Network for Temporal Sentence Grounding

AAAI 2022technical

Temporal sentence grounding (TSG) is crucial and fundamental for video understanding. Although existing methods train well-designed deep networks with large amount of data, we find that they can easily forget the rarely appeared cases during training due to the off-balance data distribution, which i…

Cited by 66Source ↗PDF ↗Scholar ↗
2022

Rethinking the Video Sampling and Reasoning Strategies for Temporal Sentence Grounding

EMNLP 2022finding

Temporal sentence grounding (TSG) aims to identify the temporal boundary of a specific segment from an untrimmed video by a sentence query. All existing works first utilize a sparse sampling strategy to extract a fixed number of video frames and then interact them with query for reasoning.However, w…

Cited by 22Source ↗PDF ↗Scholar ↗
2022

Unsupervised Temporal Video Grounding with Deep Semantic Clustering

AAAI 2022technical

Temporal video grounding (TVG) aims to localize a target segment in a video according to a given sentence query. Though respectable works have made decent achievements in this task, they severely rely on abundant video-query paired data, which is expensive to collect in real-world scenarios. In this…

Cited by 59Source ↗PDF ↗Scholar ↗
2021

Context-Aware Biaffine Localizing Network for Temporal Sentence Grounding

CVPR 2021poster

This paper addresses the problem of temporal sentence grounding (TSG), which aims to identify the temporal boundary of a specific segment from an untrimmed video by a sentence query. Previous works either compare pre-defined candidate segments with the query and select the best one by ranking, or di…

Cited by 176PDF ↗code ↗Scholar ↗
2021

Spatiotemporal Graph Neural Network based Mask Reconstruction for Video Object Segmentation

AAAI 2021technical

This paper addresses the task of segmenting class-agnostic objects in semi-supervised setting. Although previous detection based methods achieve relatively good performance, these approaches extract the best proposal by a greedy strategy, which may lose the local patch details outside the chosen can…

Cited by 27Source ↗PDF ↗Scholar ↗