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We address the problem of text-based activity retrieval in video. Given a sentence describing an activity, our task is to retrieve matching clips from an untrimmed video. To capture the inherent structures present in both text and video, we…

计算机视觉与模式识别 · 计算机科学 2018-12-27 Huijuan Xu , Kun He , Bryan A. Plummer , Leonid Sigal , Stan Sclaroff , Kate Saenko

Recent advances in long-context reasoning abilities of language models led to interesting applications in large-scale multi-document summarization. However, prior work has shown that these long-context models are not effective at their…

计算与语言 · 计算机科学 2025-04-18 Adithya Pratapa , Teruko Mitamura

Efficiently retrieving and synthesizing information from large-scale multimodal collections has become a critical challenge. However, existing video retrieval datasets suffer from scope limitations, primarily focusing on matching…

Retrieval-Augmented Generation (RAG) has demonstrated remarkable success in enhancing Large Language Models (LLMs) through external knowledge integration, yet its application has primarily focused on textual content, leaving the rich domain…

信息检索 · 计算机科学 2025-02-04 Xubin Ren , Lingrui Xu , Long Xia , Shuaiqiang Wang , Dawei Yin , Chao Huang

Retrieval-Augmented Generation (RAG) methods enhance LLM performance by efficiently filtering relevant context for LLMs, reducing hallucinations and inference cost. However, most existing RAG methods focus on single-step retrieval, which is…

Retrieval-augmented generation (RAG) systems combine the strengths of language generation and information retrieval to power many real-world applications like chatbots. Use of RAG for understanding of videos is appealing but there are two…

计算机视觉与模式识别 · 计算机科学 2024-08-20 Md Adnan Arefeen , Biplob Debnath , Md Yusuf Sarwar Uddin , Srimat Chakradhar

Comprehending long videos remains a significant challenge for Large Multi-modal Models (LMMs). Current LMMs struggle to process even minutes to hours videos due to their lack of explicit memory and retrieval mechanisms. To address this…

计算机视觉与模式识别 · 计算机科学 2025-05-07 Sameer Malik , Moyuru Yamada , Ayush Singh , Dishank Aggarwal

Long-form video understanding presents significant challenges for interactive retrieval systems, as conventional methods struggle to process extensive video content efficiently. Existing approaches often rely on single models, inefficient…

Precise video retrieval requires multi-modal correlations to handle unseen vocabulary and scenes, becoming more complex for lengthy videos where models must perform effectively without prior training on a specific dataset. We introduce a…

计算机视觉与模式识别 · 计算机科学 2025-04-08 Mohamed Eltahir , Osamah Sarraj , Mohammed Bremoo , Mohammed Khurd , Abdulrahman Alfrihidi , Taha Alshatiri , Mohammad Almatrafi , Tanveer Hussain

Information retrieval in real-time search presents unique challenges distinct from those encountered in classical web search. These challenges are particularly pronounced due to the rapid change of user search intent, which is influenced by…

信息检索 · 计算机科学 2023-12-05 Nan Yang , Shusen Zhang , Yannan Zhang , Xiaoling Bai , Hualong Deng , Tianhua Zhou , Jin Ma

Retrieval-augmented generation (RAG) enhances large language models (LLMs) by incorporating external knowledge to generate a response within a context with improved accuracy and reduced hallucinations. However, multi-modal RAG systems face…

机器学习 · 计算机科学 2025-01-09 Matin Mortaheb , Mohammad A. Amir Khojastepour , Srimat T. Chakradhar , Sennur Ulukus

Generating high-quality answers consistently by providing contextual information embedded in the prompt passed to the Large Language Model (LLM) is dependent on the quality of information retrieval. As the corpus of contextual information…

信息检索 · 计算机科学 2024-08-01 Sai Ganesh , Anupam Purwar , Gautam B

Retrieval-Augmented Language Models (RALMs) have significantly improved performance in open-domain question answering (QA) by leveraging external knowledge. However, RALMs still struggle with unanswerable queries, where the retrieved…

计算与语言 · 计算机科学 2024-08-09 Seong-Il Park , Seung-Woo Choi , Na-Hyun Kim , Jay-Yoon Lee

As the IT industry advances, system log data becomes increasingly crucial. Many computer systems rely on log texts for management due to restricted access to source code. The need for log anomaly detection is growing, especially in…

机器学习 · 计算机科学 2023-11-10 Gunho No , Yukyung Lee , Hyeongwon Kang , Pilsung Kang

Cross-modal retrieval between videos and texts has gained increasing research interest due to the rapid emergence of videos on the web. Generally, a video contains rich instance and event information and the query text only describes a part…

计算机视觉与模式识别 · 计算机科学 2022-09-28 Chengzhi Lin , Ancong Wu , Junwei Liang , Jun Zhang , Wenhang Ge , Wei-Shi Zheng , Chunhua Shen

Video anomaly detection aims to find the events in a video that do not conform to the expected behavior. The prevalent methods mainly detect anomalies by snippet reconstruction or future frame prediction error. However, the error is highly…

计算机视觉与模式识别 · 计算机科学 2022-09-08 Congqi Cao , Yue Lu , Yanning Zhang

Retrieval-augmented language models (RALMs) hold promise to produce language understanding systems that are are factual, efficient, and up-to-date. An important desideratum of RALMs, is that retrieved information helps model performance…

计算与语言 · 计算机科学 2024-05-07 Ori Yoran , Tomer Wolfson , Ori Ram , Jonathan Berant

As online video content rapidly grows, the task of text-video retrieval (TVR) becomes increasingly important. A key challenge in TVR is the information asymmetry between video and text: videos are inherently richer in information, while…

计算机视觉与模式识别 · 计算机科学 2025-03-11 Zechen Bai , Tianjun Xiao , Tong He , Pichao Wang , Zheng Zhang , Thomas Brox , Mike Zheng Shou

Retrieval-augmented generation (RAG) systems rely on retrieval models for identifying relevant contexts and answer generation models for utilizing those contexts. However, retrievers exhibit imperfect recall and precision, limiting…

计算与语言 · 计算机科学 2026-04-29 Jerry Huang , Siddarth Madala , Risham Sidhu , Cheng Niu , Hao Peng , Julia Hockenmaier , Tong Zhang

The emergence of large language models (LLMs) has revolutionized machine learning and related fields, showcasing remarkable abilities in comprehending, generating, and manipulating human language. However, their conventional usage through…