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We are concerned with retrieving a query person from multiple videos captured by a non-overlapping camera network. Existing methods often rely on purely visual matching or consider temporal constraints but ignore the spatial information of…

Computer Vision and Pattern Recognition · Computer Science 2023-07-06 Xin Zhang , Xiaohua Xie , Jianhuang Lai , Wei-Shi Zheng

Many methods have been developed to help people find the video contents they want efficiently. However, there are still some unsolved problems in this area. For example, given a query video and a reference video, how to accurately localize…

Computer Vision and Pattern Recognition · Computer Science 2018-08-07 Yang Feng , Lin Ma , Wei Liu , Tong Zhang , Jiebo Luo

The objective of the sound source localization task is to enable machines to detect the location of sound-making objects within a visual scene. While the audio modality provides spatial cues to locate the sound source, existing approaches…

Multimedia · Computer Science 2023-08-21 Sung Jin Um , Dongjin Kim , Jung Uk Kim

Video temporal grounding aims to pinpoint a video segment that matches the query description. Despite the recent advance in short-form videos (\textit{e.g.}, in minutes), temporal grounding in long videos (\textit{e.g.}, in hours) is still…

Computer Vision and Pattern Recognition · Computer Science 2024-02-20 Yulin Pan , Xiangteng He , Biao Gong , Yiliang Lv , Yujun Shen , Yuxin Peng , Deli Zhao

Enabling bi-directional retrieval of images and texts is important for understanding the correspondence between vision and language. Existing methods leverage the attention mechanism to explore such correspondence in a fine-grained manner.…

Computer Vision and Pattern Recognition · Computer Science 2020-03-10 Hui Chen , Guiguang Ding , Xudong Liu , Zijia Lin , Ji Liu , Jungong Han

The creation of manipulated multimedia content involving human characters has reached in the last years unprecedented realism, calling for automated techniques to expose synthetically generated faces in images and videos. This work explores…

Computer Vision and Pattern Recognition · Computer Science 2020-07-31 Mattia Bonomi , Cecilia Pasquini , Giulia Boato

Many real-world tasks such as recommending videos with the kids tag can be reduced to finding most similar vectors associated with hard predicates. This task, filtered vector search, is challenging as prior state-of-the-art graph-based…

Databases · Computer Science 2025-07-22 Zhaoheng Li , Silu Huang , Wei Ding , Yongjoo Park , Jianjun Chen

Semi-supervised video object segmentation is a task of segmenting the target object in a video sequence given only a mask annotation in the first frame. The limited information available makes it an extremely challenging task. Most previous…

Computer Vision and Pattern Recognition · Computer Science 2021-08-10 Yunyao Mao , Ning Wang , Wengang Zhou , Houqiang Li

The forensic investigation of a terrorist attack poses a huge challenge to the investigative authorities, as several thousand hours of video footage need to be spotted. To assist law enforcement agencies (LEA) in identifying suspects and…

Artificial Intelligence · Computer Science 2018-11-29 Alexander Schindler , Martin Boyer , Andrew Lindley , David Schreiber , Thomas Philipp

This work describes algorithms for performing discrete object detection, specifically in the case of buildings, where usually only low quality RGB-only geospatial reflective imagery is available. We utilize new candidate search and feature…

Computer Vision and Pattern Recognition · Computer Science 2016-03-15 Joseph Paul Cohen , Wei Ding , Caitlin Kuhlman , Aijun Chen , Liping Di

Given a collection of videos, how to detect content-based copies efficiently with high accuracy? Detecting copies in large video collections still remains one of the major challenges of multimedia retrieval. While many video copy detection…

Multimedia · Computer Science 2018-04-20 Jörg P. Bachmann , Benjamin Hauskeller

Temporal consistency is critical in video prediction to ensure that outputs are coherent and free of artifacts. Traditional methods, such as temporal attention and 3D convolution, may struggle with significant object motion and may not…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Zihang Lai , Andrea Vedaldi

Document retrieval has been an important research problem over many years in the information retrieval community. State-of-the-art techniques utilize various methods in matching documents to a given document including keywords, phrases, and…

Information Retrieval · Computer Science 2016-04-21 Kalpa Gunaratna

We introduce the first work to tackle the image retrieval problem as a continuous operation. While the proposed approaches in the literature can be roughly categorized into two main groups: category- and instance-based retrieval, in this…

Computer Vision and Pattern Recognition · Computer Science 2019-04-02 Ziad Al-Halah , Andreas M. Lehrmann , Leonid Sigal

Commercial web search engines employ near-duplicate detection to ensure that users see each relevant result only once, albeit the underlying web crawls typically include (near-)duplicates of many web pages. We revisit the risks and…

As an important and challenging problem in computer vision, video saliency detection is typically cast as a spatiotemporal context modeling problem over consecutive frames. As a result, a key issue in video saliency detection is how to…

Computer Vision and Pattern Recognition · Computer Science 2017-07-26 Lina Wei , Fangfang Wang , Xi Li , Fei Wu , Jun Xiao

We consider the problem of using image queries to retrieve videos from a database. Our focus is on large-scale applications, where it is infeasible to index each database video frame independently. Our main contribution is a framework based…

Multimedia · Computer Science 2016-07-13 Andre Araujo , Jason Chaves , Haricharan Lakshman , Roland Angst , Bernd Girod

Current state-of-the-art approaches to cross-modal retrieval process text and visual input jointly, relying on Transformer-based architectures with cross-attention mechanisms that attend over all words and objects in an image. While…

Computer Vision and Pattern Recognition · Computer Science 2022-02-22 Gregor Geigle , Jonas Pfeiffer , Nils Reimers , Ivan Vulić , Iryna Gurevych

Multi-modal language models (LM) have recently shown promising performance in high-level reasoning tasks on videos. However, existing methods still fall short in tasks like causal or compositional spatiotemporal reasoning over actions, in…

Computer Vision and Pattern Recognition · Computer Science 2024-01-23 Apratim Bhattacharyya , Sunny Panchal , Mingu Lee , Reza Pourreza , Pulkit Madan , Roland Memisevic

Cross-modal retrieval is an important functionality in modern search engines, as it increases the user experience by allowing queries and retrieved objects to pertain to different modalities. In this paper, we focus on the image-sentence…

Computer Vision and Pattern Recognition · Computer Science 2021-06-02 Nicola Messina , Giuseppe Amato , Fabrizio Falchi , Claudio Gennaro , Stéphane Marchand-Maillet