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Self-supervised learning allows for better utilization of unlabelled data. The feature representation obtained by self-supervision can be used in downstream tasks such as classification, object detection, segmentation, and anomaly…

Computer Vision and Pattern Recognition · Computer Science 2020-06-18 Rabia Ali , Muhammad Umar Karim Khan , Chong Min Kyung

The increasing ubiquity of video content and the corresponding demand for efficient access to meaningful information have elevated video summarization and video highlights as a vital research area. However, many state-of-the-art methods…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Pritam Mishra , Coloma Ballester , Dimosthenis Karatzas

The practicality of a video surveillance system is adversely limited by the amount of queries that can be placed on human resources and their vigilance in response. To transcend this limitation, a major effort under way is to include…

Computer Vision and Pattern Recognition · Computer Science 2014-05-16 Samaneh Khoshrou , Jaime S. Cardoso , Luis F. Teixeira

Few-shot learning and self-supervised learning address different facets of the same problem: how to train a model with little or no labeled data. Few-shot learning aims for optimization methods and models that can learn efficiently to…

Computer Vision and Pattern Recognition · Computer Science 2019-06-13 Spyros Gidaris , Andrei Bursuc , Nikos Komodakis , Patrick Pérez , Matthieu Cord

We present a method to extract a video sequence from a single motion-blurred image. Motion-blurred images are the result of an averaging process, where instant frames are accumulated over time during the exposure of the sensor.…

Computer Vision and Pattern Recognition · Computer Science 2018-04-12 Meiguang Jin , Givi Meishvili , Paolo Favaro

Current video summarization methods rely heavily on supervised computer vision techniques, which demands time-consuming and subjective manual annotations. To overcome these limitations, we investigated self-supervised video summarization.…

Computer Vision and Pattern Recognition · Computer Science 2024-08-21 Tomoya Sugihara , Shuntaro Masuda , Ling Xiao , Toshihiko Yamasaki

Few-shot learning aims to recognize novel classes from a few examples. Although significant progress has been made in the image domain, few-shot video classification is relatively unexplored. We argue that previous methods underestimate the…

Computer Vision and Pattern Recognition · Computer Science 2021-10-14 Yongqin Xian , Bruno Korbar , Matthijs Douze , Lorenzo Torresani , Bernt Schiele , Zeynep Akata

The usage of convolutional neural networks (CNNs) for unsupervised image segmentation was investigated in this study. In the proposed approach, label prediction and network parameter learning are alternately iterated to meet the following…

Computer Vision and Pattern Recognition · Computer Science 2020-08-26 Wonjik Kim , Asako Kanezaki , Masayuki Tanaka

The goal of weakly supervised video anomaly detection is to learn a detection model using only video-level labeled data. However, prior studies typically divide videos into fixed-length segments without considering the complexity or…

Computer Vision and Pattern Recognition · Computer Science 2023-12-05 Chen Zhang , Guorong Li , Yuankai Qi , Hanhua Ye , Laiyun Qing , Ming-Hsuan Yang , Qingming Huang

Speaker diarization, which is to find the speech segments of specific speakers, has been widely used in human-centered applications such as video conferences or human-computer interaction systems. In this paper, we propose a self-supervised…

Audio and Speech Processing · Electrical Eng. & Systems 2020-02-14 Yifan Ding , Yong Xu , Shi-Xiong Zhang , Yahuan Cong , Liqiang Wang

Temporal action segmentation in untrimmed videos has gained increased attention recently. However, annotating action classes and frame-wise boundaries is extremely time consuming and cost intensive, especially on large-scale datasets. To…

Computer Vision and Pattern Recognition · Computer Science 2023-03-10 Wei Lin , Anna Kukleva , Horst Possegger , Hilde Kuehne , Horst Bischof

Video summarization aims to select representative frames to retain high-level information, which is usually solved by predicting the segment-wise importance score via a softmax function. However, softmax function suffers in retaining…

Computer Vision and Pattern Recognition · Computer Science 2020-08-20 Junyan Wang , Yang Bai , Yang Long , Bingzhang Hu , Zhenhua Chai , Yu Guan , Xiaolin Wei

We present a new method to learn video representations from large-scale unlabeled video data. Ideally, this representation will be generic and transferable, directly usable for new tasks such as action recognition and zero or few-shot…

Computer Vision and Pattern Recognition · Computer Science 2020-02-28 AJ Piergiovanni , Anelia Angelova , Michael S. Ryoo

Several unsupervised and self-supervised approaches have been developed in recent years to learn visual features from large-scale unlabeled datasets. Their main drawback however is that these methods are hardly able to recognize visual…

Computer Vision and Pattern Recognition · Computer Science 2022-06-08 Alessandra Alfani , Federico Becattini , Lorenzo Seidenari , Alberto Del Bimbo

Self-supervised learning has drawn attention through its effectiveness in learning in-domain representations with no ground-truth annotations; in particular, it is shown that properly designed pretext tasks (e.g., contrastive prediction…

Computer Vision and Pattern Recognition · Computer Science 2022-01-17 Jonghwan Mun , Minchul Shin , Gunsoo Han , Sangho Lee , Seongsu Ha , Joonseok Lee , Eun-Sol Kim

We address the weakly supervised video highlight detection problem for learning to detect segments that are more attractive in training videos given their video event label but without expensive supervision of manually annotating highlight…

Computer Vision and Pattern Recognition · Computer Science 2020-08-14 Fa-Ting Hong , Xuanteng Huang , Wei-Hong Li , Wei-Shi Zheng

In this paper, we test the hypothesis that interesting events in unstructured videos are inherently audiovisual. We combine deep image representations for object recognition and scene understanding with representations from an audiovisual…

Computer Vision and Pattern Recognition · Computer Science 2021-02-12 Karel Mundnich , Alexandra Fenster , Aparna Khare , Shiva Sundaram

In recent years, learning-based image registration methods have gradually moved away from direct supervision with target warps to instead use self-supervision, with excellent results in several registration benchmarks. These approaches…

Computer Vision and Pattern Recognition · Computer Science 2022-05-17 Sean I. Young , Yaël Balbastre , Adrian V. Dalca , William M. Wells , Juan Eugenio Iglesias , Bruce Fischl

Convolutional neural networks provide visual features that perform remarkably well in many computer vision applications. However, training these networks requires significant amounts of supervision. This paper introduces a generic framework…

Machine Learning · Statistics 2017-04-19 Piotr Bojanowski , Armand Joulin

The goal of this paper is to bypass the need for labelled examples in few-shot video understanding at run time. While proven effective, in many practical video settings even labelling a few examples appears unrealistic. This is especially…

Computer Vision and Pattern Recognition · Computer Science 2022-04-20 Pengwan Yang , Yuki M. Asano , Pascal Mettes , Cees G. M. Snoek