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This review article surveys the current progresses made toward video-based anomaly detection. We address the most fundamental aspect for video anomaly detection, that is, video feature representation. Much research works have been done in…

Computer Vision and Pattern Recognition · Computer Science 2015-05-05 Yong Shean Chong , Yong Haur Tay

Videos are a rich source for self-supervised learning (SSL) of visual representations due to the presence of natural temporal transformations of objects. However, current methods typically randomly sample video clips for learning, which…

Computer Vision and Pattern Recognition · Computer Science 2022-09-30 Brian Chen , Ramprasaath R. Selvaraju , Shih-Fu Chang , Juan Carlos Niebles , Nikhil Naik

Recently, image super-resolution has been widely studied and achieved significant progress by leveraging the power of deep convolutional neural networks. However, there has been limited advancement in video super-resolution (VSR) due to the…

Computer Vision and Pattern Recognition · Computer Science 2019-05-08 Chao Li , Dongliang He , Xiao Liu , Yukang Ding , Shilei Wen

When driving, people make decisions based on current traffic as well as their desired route. They have a mental map of known routes and are often able to navigate without needing directions. Current self-driving models improve their…

Computer Vision and Pattern Recognition · Computer Science 2019-10-08 Iulia Paraicu , Marius Leordeanu

We present a novel technique for self-supervised video representation learning by: (a) decoupling the learning objective into two contrastive subtasks respectively emphasizing spatial and temporal features, and (b) performing it…

Computer Vision and Pattern Recognition · Computer Science 2021-09-02 Zehua Zhang , David Crandall

In this paper we propose an unsupervised feature extraction method to capture temporal information on monocular videos, where we detect and encode subject of interest in each frame and leverage contrastive self-supervised (CSS) learning to…

Computer Vision and Pattern Recognition · Computer Science 2022-11-28 Sina Honari , Victor Constantin , Helge Rhodin , Mathieu Salzmann , Pascal Fua

Modern self-supervised learning algorithms typically enforce persistency of instance representations across views. While being very effective on learning holistic image and video representations, such an objective becomes sub-optimal for…

Computer Vision and Pattern Recognition · Computer Science 2022-04-05 Liangzhe Yuan , Rui Qian , Yin Cui , Boqing Gong , Florian Schroff , Ming-Hsuan Yang , Hartwig Adam , Ting Liu

Event perception tasks such as recognizing and localizing actions in streaming videos are essential for scaling to real-world application contexts. We tackle the problem of learning actor-centered representations through the notion of…

Computer Vision and Pattern Recognition · Computer Science 2022-12-01 Sathyanarayanan N. Aakur , Sudeep Sarkar

During visuomotor tasks, robots must compensate for temporal delays inherent in their sensorimotor processing systems. Delay compensation becomes crucial in a dynamic environment where the visual input is constantly changing, e.g., during…

Computer Vision and Pattern Recognition · Computer Science 2018-03-12 Luiza Mici , German I. Parisi , Stefan Wermter

Traditional supervised learning methods are hitting a bottleneck because of their dependency on expensive manually labeled data and their weaknesses such as limited generalization ability and vulnerability to adversarial attacks. A…

Machine Learning · Computer Science 2021-06-08 Ran Liu

This work presents an unsupervised learning based approach to the ubiquitous computer vision problem of image matching. We start from the insight that the problem of frame-interpolation implicitly solves for inter-frame correspondences.…

Computer Vision and Pattern Recognition · Computer Science 2016-03-30 Gucan Long , Laurent Kneip , Jose M. Alvarez , Hongdong Li

Path prediction is a fundamental task for estimating how pedestrians or vehicles are going to move in a scene. Because path prediction as a task of computer vision uses video as input, various information used for prediction, such as the…

Computer Vision and Pattern Recognition · Computer Science 2018-11-02 Tsubasa Hirakawa , Takayoshi Yamashita , Toru Tamaki , Hironobu Fujiyoshi

This paper introduces a novel approach named CrossVideo, which aims to enhance self-supervised cross-modal contrastive learning in the field of point cloud video understanding. Traditional supervised learning methods encounter limitations…

Computer Vision and Pattern Recognition · Computer Science 2024-01-30 Yunze Liu , Changxi Chen , Zifan Wang , Li Yi

This paper describes recent developments in object specific pose and shape prediction from single images. The main contribution is a new approach to camera pose prediction by self-supervised learning of keypoints corresponding to locations…

Computer Vision and Pattern Recognition · Computer Science 2023-02-21 Zahra Gharaee , Felix Järemo Lawin , Per-Erik Forssén

Correspondences between frames encode rich information about dynamic content in videos. However, it is challenging to effectively capture and learn those due to their irregular structure and complex dynamics. In this paper, we propose a…

Computer Vision and Pattern Recognition · Computer Science 2019-05-21 Xingyu Liu , Joon-Young Lee , Hailin Jin

Video provides us with the spatio-temporal consistency needed for visual learning. Recent approaches have utilized this signal to learn correspondence estimation from close-by frame pairs. However, by only relying on close-by frame pairs,…

Computer Vision and Pattern Recognition · Computer Science 2022-12-07 Mohamed El Banani , Ignacio Rocco , David Novotny , Andrea Vedaldi , Natalia Neverova , Justin Johnson , Benjamin Graham

We address an essential problem in computer vision, that of unsupervised object segmentation in video, where a main object of interest in a video sequence should be automatically separated from its background. An efficient solution to this…

Computer Vision and Pattern Recognition · Computer Science 2017-04-20 Emanuela Haller , Marius Leordeanu

Recent advances in deep learning have achieved promising performance for medical image analysis, while in most cases ground-truth annotations from human experts are necessary to train the deep model. In practice, such annotations are…

Computer Vision and Pattern Recognition · Computer Science 2020-03-03 Jianbo Jiao , Richard Droste , Lior Drukker , Aris T. Papageorghiou , J. Alison Noble

Anticipating actions and objects before they start or appear is a difficult problem in computer vision with several real-world applications. This task is challenging partly because it requires leveraging extensive knowledge of the world…

Computer Vision and Pattern Recognition · Computer Science 2016-12-01 Carl Vondrick , Hamed Pirsiavash , Antonio Torralba

We propose a self-supervised approach for learning representations of objects from monocular videos and demonstrate it is particularly useful in situated settings such as robotics. The main contributions of this paper are: 1) a…

Computer Vision and Pattern Recognition · Computer Science 2019-06-12 Sören Pirk , Mohi Khansari , Yunfei Bai , Corey Lynch , Pierre Sermanet