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Pixel space augmentation has grown in popularity in many Deep Learning areas, due to its effectiveness, simplicity, and low computational cost. Data augmentation for videos, however, still remains an under-explored research topic, as most…

计算机视觉与模式识别 · 计算机科学 2022-11-10 Artjoms Gorpincenko , Michal Mackiewicz

With the advent of 2-dimensional Convolution Neural Networks (2D CNNs), the face recognition accuracy has reached above 99%. However, face recognition is still a challenge in real world conditions. A video, instead of an image, as an input…

计算机视觉与模式识别 · 计算机科学 2021-02-03 Nayaneesh Kumar Mishra , Satish Kumar Singh

Temporal convolution has been widely used for video classification. However, it is performed on spatio-temporal contexts in a limited view, which often weakens its capacity of learning video representation. To alleviate this problem, we…

计算机视觉与模式识别 · 计算机科学 2020-06-26 Xianhang Li , Yali Wang , Zhipeng Zhou , Yu Qiao

Learning the spatial-temporal representation of motion information is crucial to human action recognition. Nevertheless, most of the existing features or descriptors cannot capture motion information effectively, especially for long-term…

计算机视觉与模式识别 · 计算机科学 2017-02-13 Yemin Shi , Yonghong Tian , Yaowei Wang , Tiejun Huang

While one-dimensional convolutional neural networks (1D-CNNs) have been empirically proven effective in time series classification tasks, we find that there remain undesirable outcomes that could arise in their application, motivating us to…

机器学习 · 计算机科学 2023-10-10 Junru Zhang , Lang Feng , Yang He , Yuhan Wu , Yabo Dong

In this paper, we newly introduce the concept of temporal attention filters, and describe how they can be used for human activity recognition from videos. Many high-level activities are often composed of multiple temporal parts (e.g.,…

计算机视觉与模式识别 · 计算机科学 2016-12-28 AJ Piergiovanni , Chenyou Fan , Michael S. Ryoo

Semi-supervised video action recognition tends to enable deep neural networks to achieve remarkable performance even with very limited labeled data. However, existing methods are mainly transferred from current image-based methods (e.g.,…

计算机视觉与模式识别 · 计算机科学 2022-04-26 Junfei Xiao , Longlong Jing , Lin Zhang , Ju He , Qi She , Zongwei Zhou , Alan Yuille , Yingwei Li

We introduce Temporal consistency for Test-time adaptation (TempT) a novel method for test-time adaptation on videos through the use of temporal coherence of predictions across sequential frames as a self-supervision signal. TempT is an…

计算机视觉与模式识别 · 计算机科学 2023-04-20 Onur Cezmi Mutlu , Mohammadmahdi Honarmand , Saimourya Surabhi , Dennis P. Wall

Temporal relational reasoning, the ability to link meaningful transformations of objects or entities over time, is a fundamental property of intelligent species. In this paper, we introduce an effective and interpretable network module, the…

计算机视觉与模式识别 · 计算机科学 2018-07-26 Bolei Zhou , Alex Andonian , Aude Oliva , Antonio Torralba

Convolutional neural networks rely on image texture and structure to serve as discriminative features to classify the image content. Image enhancement techniques can be used as preprocessing steps to help improve the overall image quality…

计算机视觉与模式识别 · 计算机科学 2018-03-30 Vivek Sharma , Ali Diba , Davy Neven , Michael S. Brown , Luc Van Gool , Rainer Stiefelhagen

In this paper, we provide a deep analysis of temporal modeling for action recognition, an important but underexplored problem in the literature. We first propose a new approach to quantify the temporal relationships between frames captured…

计算机视觉与模式识别 · 计算机科学 2022-04-27 Quanfu Fan , Donghyun Kim , Chun-Fu , Chen , Stan Sclaroff , Kate Saenko , Sarah Adel Bargal

Recently, intermediate feature maps of pre-trained convolutional neural networks have shown significant perceptual quality improvements, when they are used in the loss function for training new networks. It is believed that these features…

计算机视觉与模式识别 · 计算机科学 2020-07-24 Taimoor Tariq , Okan Tarhan Tursun , Munchurl Kim , Piotr Didyk

This paper addresses temporal sentence grounding. Previous works typically solve this task by learning frame-level video features and align them with the textual information. A major limitation of these works is that they fail to…

计算机视觉与模式识别 · 计算机科学 2022-01-04 Daizong Liu , Xiaoye Qu , Pan Zhou , Yang Liu

While egocentric video is becoming increasingly popular, browsing it is very difficult. In this paper we present a compact 3D Convolutional Neural Network (CNN) architecture for long-term activity recognition in egocentric videos.…

计算机视觉与模式识别 · 计算机科学 2017-01-06 Yair Poleg , Ariel Ephrat , Shmuel Peleg , Chetan Arora

In this paper, we propose to learn temporal embeddings of video frames for complex video analysis. Large quantities of unlabeled video data can be easily obtained from the Internet. These videos possess the implicit weak label that they are…

计算机视觉与模式识别 · 计算机科学 2015-05-05 Vignesh Ramanathan , Kevin Tang , Greg Mori , Li Fei-Fei

Recently, video classification attracts intensive research efforts. However, most existing works are based on framelevel visual features, which might fail to model the temporal information, e.g. characteristics accumulated along time. In…

计算机视觉与模式识别 · 计算机科学 2016-08-18 Haimin Zhang

We address the problem of anomaly detection, that is, detecting anomalous events in a video sequence. Anomaly detection methods based on convolutional neural networks (CNNs) typically leverage proxy tasks, such as reconstructing input video…

计算机视觉与模式识别 · 计算机科学 2020-03-31 Hyunjong Park , Jongyoun Noh , Bumsub Ham

We conduct an in-depth exploration of different strategies for doing event detection in videos using convolutional neural networks (CNNs) trained for image classification. We study different ways of performing spatial and temporal pooling,…

计算机视觉与模式识别 · 计算机科学 2015-05-11 Shengxin Zha , Florian Luisier , Walter Andrews , Nitish Srivastava , Ruslan Salakhutdinov

Model pruning has become a useful technique that improves the computational efficiency of deep learning, making it possible to deploy solutions in resource-limited scenarios. A widely-used practice in relevant work assumes that a…

机器学习 · 计算机科学 2018-02-06 Jianbo Ye , Xin Lu , Zhe Lin , James Z. Wang

We address temporal action localization in untrimmed long videos. This is important because videos in real applications are usually unconstrained and contain multiple action instances plus video content of background scenes or other…

计算机视觉与模式识别 · 计算机科学 2016-04-25 Zheng Shou , Dongang Wang , Shih-Fu Chang