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In video-based person re-identification, both the spatial and temporal features are known to provide orthogonal cues to effective representations. Such representations are currently typically obtained by aggregating the frame-level features…

Computer Vision and Pattern Recognition · Computer Science 2020-06-23 S V Aruna Kumar , Ehsan Yaghoubi , Hugo Proença

Images captured nowadays are of varying dimensions with smartphones and DSLR's allowing users to choose from a list of available image resolutions. It is therefore imperative for forensic algorithms such as resampling detection to scale…

Computer Vision and Pattern Recognition · Computer Science 2020-04-29 Mohit Lamba , Kaushik Mitra

Multimodal-based action recognition methods have achieved high success using pose and RGB modality. However, skeletons sequences lack appearance depiction and RGB images suffer irrelevant noise due to modality limitations. To address this,…

Computer Vision and Pattern Recognition · Computer Science 2024-01-05 Jinfu Liu , Runwei Ding , Yuhang Wen , Nan Dai , Fanyang Meng , Shen Zhao , Mengyuan Liu

This paper proposes a simple yet effective method for human action recognition in video. The proposed method separately extracts local appearance and motion features using state-of-the-art three-dimensional convolutional neural networks…

Computer Vision and Pattern Recognition · Computer Science 2020-02-24 David Torpey , Turgay Celik

This work targets human action recognition in video. While recent methods typically represent actions by statistics of local video features, here we argue for the importance of a representation derived from human pose. To this end we…

Computer Vision and Pattern Recognition · Computer Science 2015-09-24 Guilhem Chéron , Ivan Laptev , Cordelia Schmid

For human action understanding, a popular research direction is to analyze short video clips with unambiguous semantic content, such as jumping and drinking. However, methods for understanding short semantic actions cannot be directly…

Computer Vision and Pattern Recognition · Computer Science 2021-11-23 Kenneth Li , Xiao Sun , Zhirong Wu , Fangyun Wei , Stephen Lin

Most of the current action recognition algorithms are based on deep networks which stack multiple convolutional, pooling and fully connected layers. While convolutional and fully connected operations have been widely studied in the…

Computer Vision and Pattern Recognition · Computer Science 2020-06-09 Ahmed Mazari , Hichem Sahbi

Most popular deep models for action recognition in videos generate independent predictions for short clips, which are then pooled heuristically to assign an action label to the full video segment. As not all frames may characterize the…

Computer Vision and Pattern Recognition · Computer Science 2019-09-09 Jue Wang , Anoop Cherian

Pooling layers are essential building blocks of convolutional neural networks (CNNs), to reduce computational overhead and increase the receptive fields of proceeding convolutional operations. Their goal is to produce downsampled volumes…

Computer Vision and Pattern Recognition · Computer Science 2022-12-05 Alexandros Stergiou , Ronald Poppe

We propose a novel system for active semi-supervised feature-based action recognition. Given time sequences of features tracked during movements our system clusters the sequences into actions. Our system is based on encoder-decoder…

Computer Vision and Pattern Recognition · Computer Science 2020-06-15 Jingyuan Li , Eli Shlizerman

Objective monitoring and assessment of human motor behavior can improve the diagnosis and management of several medical conditions. Over the past decade, significant advances have been made in the use of wearable technology for continuously…

Computer Vision and Pattern Recognition · Computer Science 2019-09-23 Behnaz Rezaei , Yiorgos Christakis , Bryan Ho , Kevin Thomas , Kelley Erb , Sarah Ostadabbas , Shyamal Patel

The population-based optimization algorithms have provided promising results in feature selection problems. However, the main challenges are high time complexity. Moreover, the interaction between features is another big challenge in FS…

Neural and Evolutionary Computing · Computer Science 2021-10-26 Motahare Namakin , Modjtaba Rouhani , Mostafa Sabzekar

This paper simultaneously addresses three limitations associated with conventional skeleton-based action recognition; skeleton detection and tracking errors, poor variety of the targeted actions, as well as person-wise and frame-wise action…

Computer Vision and Pattern Recognition · Computer Science 2023-03-28 Ryo Hachiuma , Fumiaki Sato , Taiki Sekii

This paper expands the strength of deep convolutional neural networks (CNNs) to the pedestrian attribute recognition problem by devising a novel attribute aware pooling algorithm. Existing vanilla CNNs cannot be straightforwardly applied to…

Computer Vision and Pattern Recognition · Computer Science 2019-07-30 Kai Han , Yunhe Wang , Han Shu , Chuanjian Liu , Chunjing Xu , Chang Xu

We propose a Convolutional Neural Network-based approach to learn, detect,and extract patterns in sequential trajectory data, known here as Social Pattern Extraction Convolution (Social-PEC). A set of experiments carried out on the human…

Computer Vision and Pattern Recognition · Computer Science 2021-09-01 Dapeng Zhao , Jean Oh

In this paper, a simple yet efficient activity recognition method for first-person video is introduced. The proposed method is appropriate for representation of high-dimensional features such as those extracted from convolutional neural…

Computer Vision and Pattern Recognition · Computer Science 2019-04-12 Reza Kahani , Alireza Talebpour , Ahmad Mahmoudi-Aznaveh

We investigate the problem of representing an entire video using CNN features for human action recognition. Currently, limited by GPU memory, we have not been able to feed a whole video into CNN/RNNs for end-to-end learning. A common…

Computer Vision and Pattern Recognition · Computer Science 2017-01-31 Zhenzhong Lan , Yi Zhu , Alexander G. Hauptmann

Deep convolutional neural networks (CNN) have shown their promise as a universal representation for recognition. However, global CNN activations lack geometric invariance, which limits their robustness for classification and matching of…

Computer Vision and Pattern Recognition · Computer Science 2014-09-10 Yunchao Gong , Liwei Wang , Ruiqi Guo , Svetlana Lazebnik

Recent studies have demonstrated the power of recurrent neural networks for machine translation, image captioning and speech recognition. For the task of capturing temporal structure in video, however, there still remain numerous open…

Computer Vision and Pattern Recognition · Computer Science 2016-02-11 Lionel Pigou , Aäron van den Oord , Sander Dieleman , Mieke Van Herreweghe , Joni Dambre

Convolutional Neural Networks (CNNs) use pooling to decrease the size of activation maps. This process is crucial to increase the receptive fields and to reduce computational requirements of subsequent convolutions. An important feature of…

Computer Vision and Pattern Recognition · Computer Science 2021-03-19 Alexandros Stergiou , Ronald Poppe , Grigorios Kalliatakis