• Title/Summary/Keyword: Pose Analysis

Search Result 408, Processing Time 0.025 seconds

Analysis of Pitching Motions by Human Pose Estimation Based on RGB Images (RGB 이미지 기반 인간 동작 추정을 통한 투구 동작 분석)

  • Yeong Ju Woo;Ji-Yong Joo;Young-Kwan Kim;Hie Yong Jeong
    • Smart Media Journal
    • /
    • v.13 no.4
    • /
    • pp.16-22
    • /
    • 2024
  • Pitching is a major part of baseball, so much so that it can be said to be the beginning of baseball. Analysis of accurate pitching motions is very important in terms of performance improvement and injury prevention. When analyzing the correct pitching motion, the currently used motion capture method has several critical environmental drawbacks. In this paper, we propose analysis of pitching motion using the RGB-based Human Pose Estimation (HPE) model to replace motion capture, which has these shortcomings, and use motion capture data and HPE data to verify its reliability. The similarity of the two data was verified by comparing joint coordinates using the Dynamic Time Warping (DTW) algorithm.

A Distributed Real-time 3D Pose Estimation Framework based on Asynchronous Multiviews

  • Taemin, Hwang;Jieun, Kim;Minjoon, Kim
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.17 no.2
    • /
    • pp.559-575
    • /
    • 2023
  • 3D human pose estimation is widely applied in various fields, including action recognition, sports analysis, and human-computer interaction. 3D human pose estimation has achieved significant progress with the introduction of convolutional neural network (CNN). Recently, several researches have proposed the use of multiview approaches to avoid occlusions in single-view approaches. However, as the number of cameras increases, a 3D pose estimation system relying on a CNN may lack in computational resources. In addition, when a single host system uses multiple cameras, the data transition speed becomes inadequate owing to bandwidth limitations. To address this problem, we propose a distributed real-time 3D pose estimation framework based on asynchronous multiple cameras. The proposed framework comprises a central server and multiple edge devices. Each multiple-edge device estimates a 2D human pose from its view and sendsit to the central server. Subsequently, the central server synchronizes the received 2D human pose data based on the timestamps. Finally, the central server reconstructs a 3D human pose using geometrical triangulation. We demonstrate that the proposed framework increases the percentage of detected joints and successfully estimates 3D human poses in real-time.

An analysis of the grasping pose of robot using force / torque information (힘 및 토오크 정보를 이용한 로보트의 잡는 자세 해석)

  • 박시영;정재옥;이범희;고명삼
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 1991.10a
    • /
    • pp.517-522
    • /
    • 1991
  • In this paper, robot's grasping poses are classified into three cases, and force/torque information in each grasping pose is analyzed. In the grasping process, error between the desired and the actual grasping poses can be generated because of uncertainty in the environment. A systematic algorithm is presented, that uses the force/torque information generated by grasping pose error to estimate robot's actual grasping pose.

  • PDF

An Evaluation Method of Taekwondo Poomsae Performance

  • Thi Thuy Hoang;Heejune Ahn
    • Journal of information and communication convergence engineering
    • /
    • v.21 no.4
    • /
    • pp.337-345
    • /
    • 2023
  • In this study, we formulated a method that evaluates Taekwondo Poomsae performance using a series of choreographed training movements. Despite recent achievements in 3D human pose estimation (HPE) performance, the analysis of human actions remains challenging. In particular, Taekwondo Poomsae action analysis is challenging owing to the absence of time synchronization data and necessity to compare postures, rather than directly relying on joint locations owing to differences in human shapes. To address these challenges, we first decomposed human joint representation into joint rotation (posture) and limb length (body shape), then synchronized a comparison between test and reference pose sequences using DTW (dynamic time warping), and finally compared pose angles for each joint. Experimental results demonstrate that our method successfully synchronizes test action sequences with the reference sequence and reflects a considerable gap in performance between practitioners and professionals. Thus, our method can detect incorrect poses and help practitioners improve accuracy, balance, and speed of movement.

Predispersed Solvent Extraction of Succinic Acid Aqueous Solution by Colloidal Liquid Aphrons in Column

  • Kim Bong Seock;Hong Yeon Ki;Huh Yun Suk;Hong Won Hi
    • Biotechnology and Bioprocess Engineering:BBE
    • /
    • v.9 no.6
    • /
    • pp.454-458
    • /
    • 2004
  • A study of the POSE (predispersed solvent extraction) for succinic acid by colloidalliq­uid aphrons was conducted. The organic phase contaning TOA (tri-n-octylamine) and 1-octanol permits a selective extraction of succinic acid from its aqueous solution. There was no difference of the extractability of POSE and that of conventional mixer-settler type extraction. Taking into account the no mechanical mixing in POSE, it was concluded that the POSE process is more adaptive than the conventional mixer-settler type extraction process. From mass transfer analysis at the various concentration of TOA in counter-current continuous operation, the concentration of TOA had no influence on the mass transfer coefficient. The loading values in continuous POSE were almost same as those in batch operation.

Novel Backprojection Method for Monocular Head Pose Estimation

  • Ju, Kun;Shin, Bok-Suk;Klette, Reinhard
    • International Journal of Fuzzy Logic and Intelligent Systems
    • /
    • v.13 no.1
    • /
    • pp.50-58
    • /
    • 2013
  • Estimating a driver's head pose is an important task in driver-assistance systems because it can provide information about where a driver is looking, thereby giving useful cues about the status of the driver (i.e., paying proper attention, fatigued, etc.). This study proposes a system for estimating the head pose using monocular images, which includes a novel use of backprojection. The system can use a single image to estimate a driver's head pose at a particular time stamp, or an image sequence to support the analysis of a driver's status. Using our proposed system, we compared two previous pose estimation approaches. We introduced an approach for providing ground-truth reference data using a mannequin model. Our experimental results demonstrate that the proposed system provides relatively accurate estimations of the yaw, tilt, and roll angle. The results also show that one of the pose estimation approaches (perspective-n-point, PnP) provided a consistently better estimate compared to the other (pose from orthography and scaling with iterations, POSIT) using our proposed system.

Stability Analysis on Solar Tracker Due to Wind (바람에 기인하는 태양광추적구조물의 안정성 해석)

  • Kim, Yong-Woo;Lee, Seoung Yeal
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.22 no.2
    • /
    • pp.216-222
    • /
    • 2013
  • A solar power generator is usually installed outdoors and it is exposed to extreme environments such as heavy fall of snow and high speed wind. Therefore, the solar tracker structure should be designed to have sufficient static and dynamic stiffness against such environmental conditions. In this paper, eigenvalue analysis of the solar tracker is carried out by varying the pose of the solar panel and unsteady flow analysis around a single tracker or multi-trackers arranged in a line is performed by varying the parameters such as wind directions, wind speeds and the pose of the solar panel to evaluate whether there exists an instability of resonance due to vortex shedding. Finite element eigenvalue analysis shows that natural frequencies and modes are almost not influenced by the pose of the solar panel and the finite element flow analysis shows that there does not exist periodic vortex shedding due to the flow around single tracker or multiple solar trackers in a line.

Design of Robust Face Recognition System to Pose Variations Based on Pose Estimation : The Comparative Study on the Recognition Performance Using PCA and RBFNNs (포즈 추정 기반 포즈변화에 강인한 얼굴인식 시스템 설계 : PCA와 RBFNNs 패턴분류기를 이용한 인식성능 비교연구)

  • Ko, Jun-Hyun;Kim, Jin-Yul;Oh, Sung-Kwun
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.64 no.9
    • /
    • pp.1347-1355
    • /
    • 2015
  • In this study, we compare the recognition performance using PCA and RBFNNs for introducing robust face recognition system to pose variations based on pose estimation. proposed face recognition system uses Honda/UCSD database for comparing recognition performance. Honda/UCSD database consists of 20 people, with 5 poses per person for a total of 500 face images. Extracted image consists of 5 poses using Multiple-Space PCA and each pose is performed by using (2D)2PCA for performing pose classification. Linear polynomial function is used as connection weight of RBFNNs Pattern Classifier and parameter coefficient is set by using Particle Swarm Optimization for model optimization. Proposed (2D)2PCA-based face pose classification performs recognition performance with PCA, (2D)2PCA and RBFNNs.

Pose Estimation of an Object from X-ray Images Based on Principal Axis Analysis

  • Roh, Young-Jun;Cho, Hyung-Suck
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 2002.10a
    • /
    • pp.97.4-97
    • /
    • 2002
  • 1. Introduction Pose estimation of a three dimensional object has been studied in robot vision area, and it is needed in a number of industrial applications such as process monitoring and control, assembly and PCB inspection. In this research, we propose a new pose estimation method based on principal axes analysis. Here, it is assumed that the locations of x-ray source and the image plane are predetermined and the object geometry is known. To this end, we define a dispersion matrix of an object, which is a discrete form of inertia matrix of the object. It can be determined here from a set of x-ray images, at least three images are required. Then, the pose information is obtained fro...

  • PDF

Kinematic analysis of the wire parallel mechanism for robot pose measurement (로봇자세 측정용 와이어 병렬메카니즘의 기구학적 해석)

  • Jeong, Jae-Won;Kim, Soo-Hyun;Kwak, Yoon-Keun
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.21 no.12
    • /
    • pp.2146-2155
    • /
    • 1997
  • This paper presents the Wire Parallel Mechanism for robot pose measurement which can be used to robot calibration. It is constructed with six parallel links using wire. The position and orientation of the end effector of a robot are calculated from the wire length that measured by the encoder. The unique solution is obtained from a Newton-Raphson method and geometric configuration of the mechanism, also the method to estimate a measuring space is presented. Through the simulations, it is verified that the proposed mechanism can measure a robot pose, and has a large measuring space. In conclusion, it can be used effectively in a robot pose measurement with little cost and effort.