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Rehabilitation is important to improve quality of life for mobility-impaired patients. Smart walkers are a commonly used solution that should embed automatic and objective tools for data-driven human-in-the-loop control and monitoring.…

Computer Vision and Pattern Recognition · Computer Science 2021-07-06 Manuel Palermo , Sara Moccia , Lucia Migliorelli , Emanuele Frontoni , Cristina P. Santos

Radar-based indoor 3D human pose estimation typically relied on fine-grained 3D keypoint labels, which are costly to obtain especially in complex indoor settings involving clutter, occlusions, or multiple people. In this paper, we propose…

Computer Vision and Pattern Recognition · Computer Science 2025-11-12 Sorachi Kato , Ryoma Yataka , Pu Perry Wang , Pedro Miraldo , Takuya Fujihashi , Petros Boufounos

Human Activity Recognition has gained significant attention due to its diverse applications, including ambient assisted living and remote sensing. Wearable sensor-based solutions often suffer from user discomfort and reliability issues,…

In this paper, we address the problem of 3D object instance recognition and pose estimation of localized objects in cluttered environments using convolutional neural networks. Inspired by the descriptor learning approach of Wohlhart et al.,…

Computer Vision and Pattern Recognition · Computer Science 2019-04-11 Sergey Zakharov , Wadim Kehl , Benjamin Planche , Andreas Hutter , Slobodan Ilic

We present a transfer learning analysis on a sporting environment of the expanded 3D (X3D) neural networks. Inspired by action quality assessment methods in the literature, our method uses an action recognition network to estimate athletes'…

Computer Vision and Pattern Recognition · Computer Science 2023-08-24 David Freire-Obregón , Javier Lorenzo-Navarro , Oliverio J. Santana , Daniel Hernández-Sosa , Modesto Castrillón-Santana

Despite the growing discriminative capabilities of modern deep learning methods for recognition tasks, the inner workings of the state-of-art models still remain mostly black-boxes. In this paper, we propose a systematic interpretation of…

Computer Vision and Pattern Recognition · Computer Science 2017-11-27 Jingxuan Hou , Tae Soo Kim , Austin Reiter

Currently, spatiotemporal features are embraced by most deep learning approaches for human action detection in videos, however, they neglect the important features in frequency domain. In this work, we propose an end-to-end network that…

Computer Vision and Pattern Recognition · Computer Science 2021-03-09 Changhai Li , Huawei Chen , Jingqing Lu , Yang Huang , Yingying Liu

Human Activity Recognition (HAR) is a challenging problem that needs advanced solutions than using handcrafted features to achieve a desirable performance. Deep learning has been proposed as a solution to obtain more accurate HAR systems…

Machine Learning · Computer Science 2020-07-08 Hamed Damirchi , Rooholla Khorrambakht , Hamid Taghirad

The problem of active mapping aims to plan an informative sequence of sensing views given a limited budget such as distance traveled. This paper consider active occupancy grid mapping using a range sensor, such as LiDAR or depth camera.…

Robotics · Computer Science 2022-04-19 Arash Asgharivaskasi , Shumon Koga , Nikolay Atanasov

This paper presents a novel approach for automatic recognition of human activities for video surveillance applications. We propose to represent an activity by a combination of category components, and demonstrate that this approach offers…

Computer Vision and Pattern Recognition · Computer Science 2015-03-03 Weiyao Lin , Ming-Ting Sun , Radha Poovendran , Zhengyou Zhang

Traditional action recognition models are constructed around the paradigm of 2D perspective imagery. Though sophisticated time-series models have pushed the field forward, much of the information is still not exploited by confining the…

Computer Vision and Pattern Recognition · Computer Science 2019-11-21 Michael Peven , Gregory D. Hager , Austin Reiter

This thesis explore different approaches using Convolutional and Recurrent Neural Networks to classify and temporally localize activities on videos, furthermore an implementation to achieve it has been proposed. As the first step, features…

Computer Vision and Pattern Recognition · Computer Science 2017-03-06 Alberto Montes , Amaia Salvador , Santiago Pascual , Xavier Giro-i-Nieto

While depth cameras and inertial sensors have been frequently leveraged for human action recognition, these sensing modalities are impractical in many scenarios where cost or environmental constraints prohibit their use. As such, there has…

Computer Vision and Pattern Recognition · Computer Science 2019-02-27 William McNally , Alexander Wong , John McPhee

The video and action classification have extremely evolved by deep neural networks specially with two stream CNN using RGB and optical flow as inputs and they present outstanding performance in terms of video analysis. One of the…

Computer Vision and Pattern Recognition · Computer Science 2016-09-05 Ali Diba , Ali Mohammad Pazandeh , Luc Van Gool

The increasing adoption of human-robot interaction presents opportunities for technology to positively impact lives, particularly those with visual impairments, through applications such as guide-dog-like assistive robotics. We present a…

Robotics · Computer Science 2024-08-27 Adam Scicluna , Cedric Le Gentil , Sheila Sutjipto , Gavin Paul

The recently proposed orthogonal time frequency space (OTFS) modulation multiplexes data symbols in the delay-Doppler (DD) domain. Since the range and velocity, which can be derived from the delay and Doppler shifts, are the parameters of…

Signal Processing · Electrical Eng. & Systems 2023-06-21 Kecheng Zhang , Weijie Yuan , Shuangyang Li , Fan Liu , Feifei Gao , Pingzhi Fan , Yunlong Cai

Service mobile robots are often required to avoid dynamic objects while performing their tasks, but they usually have only limited computational resources. To further advance the practical application of service robots in complex dynamic…

Robotics · Computer Science 2026-02-25 Yushen He , Lei Zhao , Tianchen Deng , Zipeng Fang , Weidong Chen

We tackle the problem of exploiting Radar for perception in the context of self-driving as Radar provides complementary information to other sensors such as LiDAR or cameras in the form of Doppler velocity. The main challenges of using…

Computer Vision and Pattern Recognition · Computer Science 2020-07-29 Bin Yang , Runsheng Guo , Ming Liang , Sergio Casas , Raquel Urtasun

Activity recognition is the ability to identify and recognize the action or goals of the agent. The agent can be any object or entity that performs action that has end goals. The agents can be a single agent performing the action or group…

Machine Learning · Computer Science 2019-06-19 Ashwin Geet D'Sa , B. G. Prasad

Surveillance systems, autonomous vehicles, human monitoring systems, and video retrieval are just few of the many applications in which 3D Convolutional Neural Networks are exploited. However, their extensive use is restricted by their high…

Hardware Architecture · Computer Science 2024-03-05 Petros Toupas , Christos-Savvas Bouganis , Dimitrios Tzovaras