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This paper strives for action recognition and detection in video modalities like RGB, depth maps or 3D-skeleton sequences when only limited modality-specific labeled examples are available. For the RGB, and derived optical-flow, modality…

Computer Vision and Pattern Recognition · Computer Science 2021-08-10 Fida Mohammad Thoker , Cees G. M. Snoek

Infrared (IR) imaging has the potential to enable more robust action recognition systems compared to visible spectrum cameras due to lower sensitivity to lighting conditions and appearance variability. While the action recognition task on…

Computer Vision and Pattern Recognition · Computer Science 2017-05-19 Zhuolin Jiang , Viktor Rozgic , Sancar Adali

Learning powerful discriminative features for remote sensing image scene classification is a challenging computer vision problem. In the past, most classification approaches were based on handcrafted features. However, most recent…

Computer Vision and Pattern Recognition · Computer Science 2019-02-22 Jun Li , Daoyu Lin , Yang Wang , Guangluan Xu , Chibiao Ding

Advanced driver assistance and automated driving systems rely on risk estimation modules to predict and avoid dangerous situations. Current methods use expensive sensor setups and complex processing pipeline, limiting their availability and…

Computer Vision and Pattern Recognition · Computer Science 2020-02-04 Ekim Yurtsever , Yongkang Liu , Jacob Lambert , Chiyomi Miyajima , Eijiro Takeuchi , Kazuya Takeda , John H. L. Hansen

This paper introduces Action Image, a new grasp proposal representation that allows learning an end-to-end deep-grasping policy. Our model achieves $84\%$ grasp success on $172$ real world objects while being trained only in simulation on…

Robotics · Computer Science 2020-05-15 Mohi Khansari , Daniel Kappler , Jianlan Luo , Jeff Bingham , Mrinal Kalakrishnan

An autonomous system's perception engine must provide an accurate understanding of the environment for it to make decisions. Deep learning based object detection networks experience degradation in the performance and robustness for small…

Computer Vision and Pattern Recognition · Computer Science 2022-10-10 Hemant Kumawat , Saibal Mukhopadhyay

Joint segmentation and classification of fine-grained actions is important for applications of human-robot interaction, video surveillance, and human skill evaluation. However, despite substantial recent progress in large-scale action…

Computer Vision and Pattern Recognition · Computer Science 2016-10-03 Colin Lea , Austin Reiter , Rene Vidal , Gregory D. Hager

Deep learning models have enjoyed great success for image related computer vision tasks like image classification and object detection. For video related tasks like human action recognition, however, the advancements are not as significant…

Computer Vision and Pattern Recognition · Computer Science 2018-09-12 Xiaolin Song , Cuiling Lan , Wenjun Zeng , Junliang Xing , Jingyu Yang , Xiaoyan Sun

Correspondence estimation is one of the most widely researched and yet only partially solved area of computer vision with many applications in tracking, mapping, recognition of objects and environment. In this paper, we propose a novel way…

Computer Vision and Pattern Recognition · Computer Science 2020-04-16 Umashankar Deekshith , Nishit Gajjar , Max Schwarz , Sven Behnke

We propose a new action and gesture recognition method based on spatio-temporal covariance descriptors and a weighted Riemannian locality preserving projection approach that takes into account the curved space formed by the descriptors. The…

Computer Vision and Pattern Recognition · Computer Science 2013-03-26 Andres Sanin , Conrad Sanderson , Mehrtash T. Harandi , Brian C. Lovell

Standard methods for video recognition use large CNNs designed to capture spatio-temporal data. However, training these models requires a large amount of labeled training data, containing a wide variety of actions, scenes, settings and…

Computer Vision and Pattern Recognition · Computer Science 2021-03-31 AJ Piergiovanni , Michael S. Ryoo

Though action recognition in videos has achieved great success recently, it remains a challenging task due to the massive computational cost. Designing lightweight networks is a possible solution, but it may degrade the recognition…

Computer Vision and Pattern Recognition · Computer Science 2020-02-11 Wenhao Wu , Dongliang He , Xiao Tan , Shifeng Chen , Yi Yang , Shilei Wen

Inspired by recent advances in neural machine translation, that jointly align and translate using encoder-decoder networks equipped with attention, we propose an attentionbased LSTM model for human activity recognition. Our model jointly…

Computer Vision and Pattern Recognition · Computer Science 2017-09-01 Atousa Torabi , Leonid Sigal

Skeleton-based action recognition has recently made significant progress. However, data imbalance is still a great challenge in real-world scenarios. The performance of current action recognition algorithms declines sharply when training…

Computer Vision and Pattern Recognition · Computer Science 2025-02-24 Hongda Liu , Yunlong Wang , Min Ren , Junxing Hu , Zhengquan Luo , Guangqi Hou , Zhenan Sun

In this paper we discuss several forms of spatiotemporal convolutions for video analysis and study their effects on action recognition. Our motivation stems from the observation that 2D CNNs applied to individual frames of the video have…

Computer Vision and Pattern Recognition · Computer Science 2018-04-13 Du Tran , Heng Wang , Lorenzo Torresani , Jamie Ray , Yann LeCun , Manohar Paluri

Attention models have recently emerged as a powerful approach, demonstrating significant progress in various fields. Visualization techniques, such as class activation mapping, provide visual insights into the reasoning of convolutional…

Computer Vision and Pattern Recognition · Computer Science 2025-10-31 Ali Caglayan , Nevrez Imamoglu , Oguzhan Guclu , Ali Osman Serhatoglu , Ahmet Burak Can , Ryosuke Nakamura

Deep reinforcement learning has become popular over recent years, showing superiority on different visual-input tasks such as playing Atari games and robot navigation. Although objects are important image elements, few work considers…

Machine Learning · Computer Science 2018-09-18 Yuezhang Li , Katia Sycara , Rahul Iyer

Estimating action quality, the process of assigning a "score" to the execution of an action, is crucial in areas such as sports and health care. Unlike action recognition, which has millions of examples to learn from, the action quality…

Computer Vision and Pattern Recognition · Computer Science 2017-05-19 Paritosh Parmar , Brendan Tran Morris

Fine-grained action detection is an important task with numerous applications in robotics and human-computer interaction. Existing methods typically utilize a two-stage approach including extraction of local spatio-temporal features…

Computer Vision and Pattern Recognition · Computer Science 2019-11-11 Khoi-Nguyen C. Mac , Dhiraj Joshi , Raymond A. Yeh , Jinjun Xiong , Rogerio S. Feris , Minh N. Do

The discriminative power of modern deep learning models for 3D human action recognition is growing ever so potent. In conjunction with the recent resurgence of 3D human action representation with 3D skeletons, the quality and the pace of…

Computer Vision and Pattern Recognition · Computer Science 2017-04-18 Tae Soo Kim , Austin Reiter