Готові списки джерел за темами / Vicon motion capture system

Зміст

Статті в журналах
Дисертації
Книги
Частини книг
Тези доповідей конференцій
Звіти організацій

Добірка наукової літератури з теми "Vicon motion capture system"

Автор: Grafiati

Опубліковано: 10 січня 2023

Оновлено: 28 січня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Vicon motion capture system".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Vicon motion capture system"

Ma, Christina Zong-Hao, Yan To Ling, Queenie Tsung Kwan Shea, Li-Ke Wang, Xiao-Yun Wang, and Yong-Ping Zheng. "Towards Wearable Comprehensive Capture and Analysis of Skeletal Muscle Activity during Human Locomotion." Sensors 19, no. 1 (January 7, 2019): 195. http://dx.doi.org/10.3390/s19010195.

Повний текст джерела

Анотація:

Background: Motion capture and analyzing systems are essential for understanding locomotion. However, the existing devices are too cumbersome and can be used indoors only. A newly-developed wearable motion capture and measurement system with multiple sensors and ultrasound imaging was introduced in this study. Methods: In ten healthy participants, the changes in muscle area and activity of gastrocnemius, plantarflexion and dorsiflexion of right leg during walking were evaluated by the developed system and the Vicon system. The existence of significant changes in a gait cycle, comparison of the ankle kinetic data captured by the developed system and the Vicon system, and test-retest reliability (evaluated by the intraclass correlation coefficient, ICC) in each channel’s data captured by the developed system were examined. Results: Moderate to good test-retest reliability of various channels of the developed system (0.512 ≤ ICC ≤ 0.988, p < 0.05), significantly high correlation between the developed system and Vicon system in ankle joint angles (0.638R ≤ 0.707, p < 0.05), and significant changes in muscle activity of gastrocnemius during a gait cycle (p < 0.05) were found. Conclusion: A newly developed wearable motion capture and measurement system with ultrasound imaging that can accurately capture the motion of one leg was evaluated in this study, which paves the way towards real-time comprehensive evaluation of muscles and joint motions during different activities in both indoor and outdoor environments.

Стилі APA, Harvard, Vancouver, ISO та ін.

Dzulkifli, Azkiyyah Wahida, Siti Aisyah Mualif, Aizreena Azaman, Siti Nor Ismalina Isa, Seri Mirianti Ishar, Ahmad Razali Ishak, Mohd Yusmaidie Aziz, Muhammad Yusran Abdul Aziz, and Noor Asyikin Suaidi. "A Footprint Analysis: Comparison between Conventional Scanning Method and Motion Capture System." Malaysian Journal of Fundamental and Applied Sciences 18, no. 5 (December 15, 2022): 521–29. http://dx.doi.org/10.11113/mjfas.v18n5.2325.

Повний текст джерела

Анотація:

Footprint is a key element in human physiological characteristic study, for determining gender, height and weight. This study is to investigate the reliability of using conventional scanning method by comparing results with motion capture system method. The study takes footprint images from conventional scanning and processed using MATLAB. The captured gait movement data are generated from Vicon Nexus and Vicon Polygon respectively. Afterwards the data from the two methods were analysed for correlation test. The significant difference between measurement of gait parameters using Vicon and conventional scanned method were tested using paired sample t-test and the concurrent validity of conventional scanned method was tested using Pearson correlation. Although there was significance difference between measurement using both methods, the correlation analysis displayed moderate to high positive significant correlation of the parameters indicating the validity of the conventional scanned method. This concludes this study to accept the alternative hypothesis that there is a linear relationship between these two procedures.

Стилі APA, Harvard, Vancouver, ISO та ін.

Grouios, George, Efthymios Ziagkas, Andreas Loukovitis, Konstantinos Chatzinikolaou, and Eirini Koidou. "Accelerometers in Our Pocket: Does Smartphone Accelerometer Technology Provide Accurate Data?" Sensors 23, no. 1 (December 24, 2022): 192. http://dx.doi.org/10.3390/s23010192.

Повний текст джерела

Анотація:

This study evaluates accelerometer performance of three new state of the art smartphones and focuses on accuracy. The motivating research question was whether accelerator accuracy obtained with these off-the-shelf modern smartphone accelerometers was or was not statistically different from that of a gold-standard reference system. We predicted that the accuracy of the three modern smartphone accelerometers in human movement data acquisition do not differ from that of the Vicon MX motion capture system. To test this prediction, we investigated the comparative performance of three different commercially available current generation smartphone accelerometers among themselves and to a gold-standard Vicon MX motion capture system. A single subject design was implemented for this study. Pearson’s correlation coefficients® were calculated to verify the validity of the smartphones’ accelerometer data against that of the Vicon MX motion capture system. The Intraclass Correlation Coefficient (ICC) was used to assess the smartphones’ accelerometer performance reliability compared to that of the Vicon MX motion capture system. Results demonstrated that (a) the tested smartphone accelerometers are valid and reliable devices for estimating accelerations and (b) there were not significant differences among the three current generation smartphones and the Vicon MX motion capture system’s mean acceleration data. This evidence indicates how well recent generation smartphone accelerometer sensors are capable of measuring human body motion. This study, which bridges a significant information gap between the accuracy of accelerometers measured close to production and their accuracy in actual smartphone research, should be interpreted within the confines of its scope, limitations and strengths. Further research is warranted to validate our arguments, suggestions, and results, since this is the first study on this topic.

Стилі APA, Harvard, Vancouver, ISO та ін.

Chen, Si Xi, Shu Chen, Jian De Lin, Jian Wei Li, and Xin Chen. ""The Seven Claps" of Quan-Zhou Chest-Clapping with Motion Capture." Applied Mechanics and Materials 311 (February 2013): 202–7. http://dx.doi.org/10.4028/www.scientific.net/amm.311.202.

Повний текст джерела

Анотація:

This paper focuses on the motion capture method of the certain variety of South China traditional folk dance, Quan-zhou Chest-clapping. The authors used Vicon Motion Capture system to capture the motion of “the seven claps”, the basic form of Quan-zhou Chest-clapping Dance, and optimized the capture procedures and acting standards for the clapping and certain motions’ capture. To process the motion data , the authors used the Motionanalysis system to obtain the six degrees of freedom of certain basic dance motions, by measuring the motions’ maximum and minimum values of linear displacements and angular displacements on axis X ,Y and Z. Based on the measuring results of the motions’ degrees of freedom, the authors further discussed the quantification of motion course and developed the integrate exclusive motion capturing assessment criteria.

Стилі APA, Harvard, Vancouver, ISO та ін.

McGroarty, M., S. Giblin, D. Meldrum, and F. Wetterling. "ACCURACY OF A LOW-COST NOVEL COMPUTER-VISION DYNAMIC MOVEMENT ASSESSMENT: POTENTIAL LIMITATIONS AND FUTURE DIRECTIONS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-5/W8 (April 7, 2016): 1–5. http://dx.doi.org/10.5194/isprs-archives-xl-5-w8-1-2016.

Повний текст джерела

Анотація:

The aim of the study was to perform a preliminary validation of a low cost markerless motion capture system (CAPTURE) against an industry gold standard (Vicon). Measurements of knee valgus and flexion during the performance of a countermovement jump (CMJ) between CAPTURE and Vicon were compared. After correction algorithms were applied to the raw CAPTURE data acceptable levels of accuracy and precision were achieved. The knee flexion angle measured for three trials using Capture deviated by −3.8° ± 3° (left) and 1.7° ± 2.8° (right) compared to Vicon. The findings suggest that low-cost markerless motion capture has potential to provide an objective method for assessing lower limb jump and landing mechanics in an applied sports setting. Furthermore, the outcome of the study warrants the need for future research to examine more fully the potential implications of the use of low-cost markerless motion capture in the evaluation of dynamic movement for injury prevention.

Стилі APA, Harvard, Vancouver, ISO та ін.

Liu, Hai Bin, Zhi Qiang He, Wen Xue Yuan, and Zhou Yang. "Comparing 3 Different Foot Models for Ankle Joint Motion during Gait." Applied Mechanics and Materials 440 (October 2013): 135–39. http://dx.doi.org/10.4028/www.scientific.net/amm.440.135.

Повний текст джерела

Анотація:

Objective is to study different foot models and their corresponding parameters, provide references for foot segment and give the correct definition for ankle joint angle. Methods: The data were captured and analyzed by Vicon Motion System, and compute the joint angle parameters. Conclusion: The Toe Model is no suit for constructing ankle joint, MidJoint Model only for high equipped motion capture system and Phalange Model should be recommended after verification.

Стилі APA, Harvard, Vancouver, ISO та ін.

Choo, Corliss Zhi Yi, Jia Yi Chow, and John Komar. "Validation of the Perception Neuron system for full-body motion capture." PLOS ONE 17, no. 1 (January 21, 2022): e0262730. http://dx.doi.org/10.1371/journal.pone.0262730.

Повний текст джерела

Анотація:

Recent advancements in Inertial Measurement Units (IMUs) offers the possibility of its use as a cost effective and portable alternative to traditional optoelectronic motion capture systems in analyzing biomechanical performance. One such commercially available IMU is the Perception Neuron motion capture system (PNS). The accuracy of the PNS had been tested and was reported to be a valid method for assessing the upper body range of motion to within 5° RMSE. However, testing of the PNS was limited to upper body motion involving functional movement within a single plane. Therefore, the purpose of this study is to further validate the Perception Neuron system with reference to a conventional optoelectronic motion capture system (VICON) through the use of dynamic movements (e.g., walking, jogging and a multi-articular sports movement with object manipulation) and to determine its feasibility through full-body kinematic analysis. Validation was evaluated using Pearson’s R correlation, RMSE and Bland-Altman estimates. Present findings suggest that the PNS performed well against the VICON motion analysis system with most joint angles reporting a RMSE of < 4° and strong average Pearson’s R correlation of 0.85, with the exception of the shoulder abduction/adduction where RMSE was larger and Pearson’s R correlation at a moderate level. Bland-Altman analysis revealed that most joint angles across the different movements had a mean bias of less than 10°, except for the shoulder abduction/adduction and elbow flexion/extension measurements. It was concluded that the PNS may not be the best substitute for traditional motion analysis technology if there is a need to replicate raw joint angles. However, there was adequate sensitivity to measure changes in joint angles and would be suitable when normalized joint angles are compared and the focus of analysis is to identify changes in movement patterns.

Стилі APA, Harvard, Vancouver, ISO та ін.

RAMBELY, A. S., and FAZROLROZI. "A SIX-LINK KINEMATIC CHAIN MODEL OF HUMAN BODY USING KANE'S METHOD." International Journal of Modern Physics: Conference Series 09 (January 2012): 59–67. http://dx.doi.org/10.1142/s2010194512005107.

Повний текст джерела

Анотація:

A biomechanics model of six-link kinematic chain of human body is developed by using Kane's method. The kinematic data comprise of six segments; foot, calf, thigh, trunk, upper arm and forearm, are obtained through data collection of walking, running and jumping using the Vicon Nexus system. The motion capture system uses 12 Vicon MX-3+ cameras and 12 Vicon MX-F40 cameras, two DV (50 Hz) cameras and a force plate (100 Hz). Inverse dynamics approach is used to obtain the unknown value of torques produced by joint segments during walking, running and jumping activities. The results show that the largest value of torques produced occurs at the foot segment.

Стилі APA, Harvard, Vancouver, ISO та ін.

van der Veen, Susanne, Martine Bordeleau, Peter Pidcoe, Christopher France, and James Thomas. "Agreement Analysis between Vive and Vicon Systems to Monitor Lumbar Postural Changes." Sensors 19, no. 17 (August 21, 2019): 3632. http://dx.doi.org/10.3390/s19173632.

Повний текст джерела

Анотація:

Immersive virtual reality has recently developed into a readily available system that allows for full-body tracking. Can this affordable system be used for component tracking to advance or replace expensive kinematic systems for motion analysis in the clinic? The aim of this study was to assess the accuracy of position and orientation measures from Vive wireless body trackers when compared to Vicon optoelectronic tracked markers attached to (1) a robot simulating trunk flexion and rotation by repeatedly moving to know locations, and (2) healthy adults playing virtual reality games necessitating significant trunk displacements. The comparison of both systems showed component tracking with Vive trackers is accurate within 0.68 ± 0.32 cm translationally and 1.64 ± 0.18° rotationally when compared with a three-dimensional motion capture system. No significant differences between Vive trackers and Vicon systems were found suggesting the Vive wireless sensors can be used to accurately track joint motion for clinical and research data.

Стилі APA, Harvard, Vancouver, ISO та ін.

Wang, Sophie L., Gene Civillico, Wesley Niswander, and Kimberly L. Kontson. "Comparison of Motion Analysis Systems in Tracking Upper Body Movement of Myoelectric Bypass Prosthesis Users." Sensors 22, no. 8 (April 12, 2022): 2953. http://dx.doi.org/10.3390/s22082953.

Повний текст джерела

Анотація:

Current literature lacks a comparative analysis of different motion capture systems for tracking upper limb (UL) movement as individuals perform standard tasks. To better understand the performance of various motion capture systems in quantifying UL movement in the prosthesis user population, this study compares joint angles derived from three systems that vary in cost and motion capture mechanisms: a marker-based system (Vicon), an inertial measurement unit system (Xsens), and a markerless system (Kinect). Ten healthy participants (5F/5M; 29.6 ± 7.1 years) were trained with a TouchBionic i-Limb Ultra myoelectric terminal device mounted on a bypass prosthetic device. Participants were simultaneously recorded with all systems as they performed standardized tasks. Root mean square error and bias values for degrees of freedom in the right elbow, shoulder, neck, and torso were calculated. The IMU system yielded more accurate kinematics for shoulder, neck, and torso angles while the markerless system performed better for the elbow angles. By evaluating the ability of each system to capture kinematic changes of simulated upper limb prosthesis users during a variety of standardized tasks, this study provides insight into the advantages and limitations of using different motion capture technologies for upper limb functional assessment.

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Дисертації з теми "Vicon motion capture system"

Grubisic, Ivan. "ALGORITHMS FOR CALCULATING THE 3D CENTER OF ROTATION USING VICON MOTION CAPTURE SYSTEM AND MATLAB." Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/192460.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Hanson, Andrew Todd. "Markerless Motion Capture and Analysis System to Enhance Exercise Professional Effectiveness: Preliminary Study." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1481223866357858.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Lindequist, Jonas, and Daniel Lönnblom. "Construction of a Motion Capture System." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-24.

Повний текст джерела

Анотація:

Motion capture is the process of capturing movements from real life into a computer. Existing motion capture systems are often very expensive and require advanced hardware that makes the process complex. This thesis will answer the following question: is it possible to create an optical motion capture system using only a single low cost Dvcamera (Digital Video Camera), that still will produce accurate motion capture data? To answer this question and construct our motion capture system we need to complete these following steps:

• Create a usable film sequence.

• Analyze the sequence.

• Create motion capture data.

• Apply the motion capture data for 3D character and analyze the outcome.

The method chosen for this thesis is constructive research. In short terms it is the study of whether we can or cannot build a new artifact. The following theoretic tools were used in the process of creating a motion capture system: Color theory, RGB, Connected component labeling, Skeletons in 3D animation, Calculating angels using trigonometry, .x files and Quaternions. We have found that an optical motion capture system is very complex and it is hard to produce as a low budget system. Our attempt did not live up to our expectations. The idea with using only one DV camera was to simplify the system since it would require no calibration or syncronisation. It would also make the system cost efficient and more available to the general public. The single camera solution unfortunatly created a number of problems in our system. Our system does however work with less complex movements. It can produce motion capture data that is accurate enough to be used in low budget games. It is also cost effective compared to other systems on the market. The system has a very easy setup and does not need any calibration in addition to the init position.

Стилі APA, Harvard, Vancouver, ISO та ін.

Tällberg, Niklas, and Alexander Paus. "Lågbudget filmskapande och tillverkning av billigt Motion Capture system." Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-12184.

Повний текст джерела

Анотація:

Nya filmer som skapas innehåller mer och mer datorgenererade bilder och många filmer skapas även helt den digitala vägen, detta innebär att det krävs en rad olika dyra licenser för program och verktyg för att kunna skapa bra filmer. Genom ett projekt där en kortfilm skapas helt i 3D med en så låg budget som möjligt och som dessutom ska använda sig av Motion Capture som animerings-teknik så krävs det ett bra alternativ till att tillverka ett eget Motion Capture system för att så lite pengar som möjligt ska spenderas. Genom använding av Playstation kameror och lånade material kan ett billigt Motion Capture system tillverkas, samtidigt som kostnaden för kortfilmen hålls så låg som möjligt. Hur många timmar som lagts ned på modellering av objekt till filmen kan jämföras med ett uppskattat pris för anställning av professionell hjälp och dessutom se om detta verkligen är ett lönsamt alternativ istället för att skapa sina egna modeller till filmen.

Стилі APA, Harvard, Vancouver, ISO та ін.

Brown, Richard George. "Three-dimensional motion capture for the DIET breast cancer imaging system." Thesis, University of Canterbury. Mechanical Engineering, 2008. http://hdl.handle.net/10092/1250.

Повний текст джерела

Анотація:

Breast cancer is one of the most prevalent forms of cancer in the world today. The search for effective treatment and screening methods is a highly active area of research. The Digital Image-based ElastoTomography (DIET) project is a new breast cancer screening system under development, where surface motion from the mechanically actuated breast is measured in 3D, and used as input to an inverse problem solving for breast elasticity. Cancerous lesions appear as high contrast features, being an order of magnitude stiffer than healthy tissue. The 3D motion capture is measured by an array of digital cameras using computer vision techniques. This thesis presents a complete imaging system and algorithms for the capture of 3D breast surface motion. The main components of the 3D motion capture system are the hardware and software image capture system, camera calibration, intra-image feature tracking, and 3D surface and motion reconstruction. Accurate algorithms for each of these components are developed, with a view to future development and potential modifications needed for a clinically-appropriate system. A number of the algorithms developed have potential applications outside of the DIET system. Proof of concept studies demonstrate the viability of the system, with full motion reconstruction being performed on silicone gel phantoms, designed to approximate human soft tissue, in a number of laboratory experiments.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ozyalcin, Anil E. "SOLITONS: A COMPACT, LOW-COST, AND WIRELESS BODY MOTION CAPTURE SYSTEM." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437440750.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Gilbert, Mathew Alan. "Optimising visuo-locomotor interactions in a motion-capture virtual reality rehabilitation system." Thesis, University of York, 2013. http://etheses.whiterose.ac.uk/3986/.

Повний текст джерела

Анотація:

This thesis presents the research-driven design and development of Stromohab: A motion-capture virtual-reality locomotion simulator for the research and rehabilitation of gait disorders following stroke. Software and hardware components are designed, developed and tested to facilitate and motivate patients in rehabilitative interactive avatar-based locomotor tasks. The system is then used to investigate systematically on healthy volunteers the known problem of distance underestimation in virtual environments by testing and analysing all combinations of cross-planar translation of leg movement to avatar actuated movement in a virtual environment. Specific performance deficits in the sagittal plane are confirmed and compared to those from coronal and transverse motion. Potential improvements of adding in isolation monocular cues for perspective, illumination, or size, and binocular cues from 3D stereo anaglyphs, are investigated, leading to a proposed movement model and scaling solution that both explains and resolves the observed deficit empirically in a practical locomotor task. Overall, the findings demonstrate the importance for the design and application of virtual environment interfaces of quantifying the underlying mechanisms in order to ensure accurate and controlled reproduction of a user’s movement. These would be of particular significance in medical rehabilitation for neurological patients, for whom consideration of cognitive load and the potential for improper re-adaptation when returning to real world environments can be critical. It is envisaged that this study will be useful to technologists, clinicians and other professionals who apply the rapidly developing, increasingly accessible and beneficial motion capture and virtual reality technologies to medicine and related applications.

Стилі APA, Harvard, Vancouver, ISO та ін.

Beriault, Silvain. "Multi-camera system design, calibration and three-dimensional reconstruction for markerless motion capture." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27957.

Повний текст джерела

Анотація:

Recently, significant advances have been made in many sub-areas regarding the problem of markerless human motion capture. However, markerless solutions still tend to introduce major simplifications, especially in early stages of the process, that temper the robustness and the generality of any subsequent modules and, consequently, of the whole application. This thesis concentrates on improving the aspects of multi-camera system design, multi-camera calibration and shape-from-silhouette volumetric reconstruction. In Chapter 3, a thoughtful system analysis is first proposed with the objective of achieving an optimal synchronized multi-camera system. Chapter 4 proposes an easy-to-use multi-camera calibration technique to estimate the relative positioning and orientation of every camera with sub-pixel accuracy. In Chapter 5 a robust shape-from-silhouette algorithm, with precise voxel coloring, is developed. Overall, the proposed framework is successful to reconstruct various 3D human postures and, in particular, complex and self-occlusive pianist postures in real-world (minimally constrained) scenes.

Стилі APA, Harvard, Vancouver, ISO та ін.

Manivasagam, Karnica. "COMPARISON OF WRIST VELOCITY MEASUREMENT METHODS: IMU, GONIOMETER AND OPTICAL MOTION CAPTURE SYSTEM." Thesis, KTH, Medicinteknik och hälsosystem, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-287178.

Повний текст джерела

Анотація:

Repetitive tasks, awkward hand/wrist postures and forceful exertions are known risk factors for work-related musculoskeletal disorders (WMSDs) of the hand and wrist. WMSD is a major cause of long work absence, productivity loss, loss in wages and individual suffering. Currently available assessment methods of the hand/wrist motion have the limitations of being inaccurate, e.g. when using self-reports or observations, or expensive and resource-demanding for following analyses, e.g. when using the electrogoniometers. Therefore, there is a need for a risk assessment method that is easy-to-use and can be applied by both researchers and practitioners for measuring wrist angular velocity during an 8-hour working day. Wearable Inertial Measurement Units (IMU) in combination with mobile phone applications provide the possibility for such a method. In order to apply the IMU in the field for assessing the wrist velocity of different work tasks, the accuracy of the method need to be examined. Therefore, this laboratory experiment was conducted to compare a new IMU-based method with the traditional goniometer and standard optical motion capture system. The laboratory experiment was performed on twelve participants. Three standard hand movements, including hand/wrist motion of Flexion-extension (FE), Deviation, and Pronationsupination (PS) at 30, 60, 90 beat-per-minute (bpm), and three simulated work tasks were performed. The angular velocity of the three methods at 50th and 90th percentile were calculated and compared. The mean absolute error and correlation coefficient were analysed for comparing the methods. Increase in error was observed with increase in speed/bpm during the standard hand movements. For standard hand movements, comparison between IMUbyaxis and Goniometer had the smallest difference and highest correlation coefficient. For simulated work tasks, the difference between goniometer and optical system was the smallest. However, for simulated work tasks, the differences between the compared methods were in general much larger than the standard hand movements. The IMU-based method is seen to have potential when compared with the traditional measurement methods. Still, it needs further improvement to be used for risk assessment in the field.
Upprepade uppgifter, besvärliga hand- / handledsställningar och kraftfulla ansträngningar är kända riskfaktorer för arbetsrelaterade muskuloskeletala störningar (WMSD) i hand och handled. WMSD är en viktig orsak till lång frånvaro, produktivitetsförlust, löneförlust och individuellt lidande. För närvarande tillgängliga bedömningsmetoder för hand / handledsrörelser har begränsningarna att vara felaktiga, t.ex. när du använder självrapporter eller observationer, eller dyra och resurskrävande för följande analyser, t.ex. när du använder elektrogoniometrarna. Därför finns det ett behov av en riskbedömningsmetod som är enkel att använda och som kan användas av både forskare och utövare för att mäta handledens vinkelhastighet under en 8-timmars arbetsdag. Wearable Inertial Measuring Units (IMU) i kombination med mobiltelefonapplikationer ger möjlighet till en sådan metod. För att kunna använda IMU i fältet för att bedöma handledens hastighet för olika arbetsuppgifter måste metodens noggrannhet undersökas. Därför genomfördes detta laboratorieexperiment för att jämföra en ny IMU-baserad metod med den traditionella goniometern och det vanliga optiska rörelsefångningssystemet. Laboratorieexperimentet utfördes på tolv deltagare. Tre standardhandrörelser, inklusive hand / handledsrörelse av Flexion-extension (FE), Deviation och Pronation-supination (PS) vid 30, 60, 90 beat-per-minut (bpm) och tre simulerade arbetsuppgifter utfördes. Vinkelhastigheten för de tre metoderna vid 50: e och 90: e percentilen beräknades och jämfördes. Det genomsnittliga absoluta felet och korrelationskoefficienten analyserades för att jämföra metoderna. Ökning av fel observerades med ökning av hastighet/bpm under standardhandrörelserna. För standardhandrörelser hade jämförelsen mellan IMUbyaxis och Goniometer den minsta skillnaden och högsta korrelationskoefficienten. För simulerade arbetsuppgifter var skillnaden mellan goniometer och optiskt system den minsta. För simulerade arbetsuppgifter var dock skillnaderna mellan de jämförda metoderna i allmänhet mycket större än de vanliga handrörelserna. Den IMUbaserade metoden anses ha potential jämfört med traditionella mätmetoder. Ändå behöver det förbättras för att kunna användas för riskbedömning på fältet.

Стилі APA, Harvard, Vancouver, ISO та ін.

Dasari, Ganeshram. "Development of a robust 3-D ultrasonic tracking system for motion capture studies /." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1796330211&sid=15&Fmt=2&clientId=1509&RQT=309&VName=PQD.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Книги з теми "Vicon motion capture system"

Dutta, Tilak. Development of a portable motion capture system for biomechanical assessment of caregivers in the field. 2006.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Dürsteler, Max R., and Erika N. Lorincz. Stereo Rotation Standstill and Related Illusions. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780199794607.003.0106.

Повний текст джерела

Анотація:

When we fixate the center of a rotating three-dimensional structure, such as a physically rotating wheel made out of sectors, which stereo cues are encoded with a static random-dot “texture,” a rather striking global motion illusion occurs: the rotating three-dimensional wheel appears as standing still (stereo rotation standstill). Even when using a dynamic (flickering) random-dot texture, it is still impossible to gain a percept of smooth rotation. However, local motion can still be clearly perceived. When the random-dot texture “overlaying” the wheel is also rotating, the concealed wheel is perceived as rotating at the same velocity as the texture, regardless of its velocity (stereo rotation capture). Stereo complex motion standstill and capture is shown to occur for other categories of complex motions such as expanding, contracting, and spiraling motions thus providing evidence for a dominance of luminance inputs over stereo inputs for complex motion detectors in our visual system.

Стилі APA, Harvard, Vancouver, ISO та ін.

Saha, Prasenjit, and Paul A. Taylor. Orbits. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198816461.003.0001.

Повний текст джерела

Анотація:

Astronomy and recording of the motion of celestial objects are ancient practices, but what is now called astrophysics arguably began with Newtonian gravity and the concept of orbits as dynamical phenomena. This chapter provides a modern perspective on the early problems of gravitational dynamics, from Kepler’s laws up to the virial theorem for an arbitrary number of gravitating bodies. Even a simple gravitating system with only two bodies turns out to have many interesting features, such as the gravitational capture of material by protoplanets. The study of orbital motions also includes applications to observing extrasolar planets and stars near the black hole at the centre of the Milky Way.

Стилі APA, Harvard, Vancouver, ISO та ін.

Частини книг з теми "Vicon motion capture system"

Liu, Ze-guo. "Human Motion Attitude Tracking Method Based on Vicon Motion Capture Under Big Data." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 383–91. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-36402-1_41.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Liu, Ze-guo. "3D Human Motion Information Extraction Based on Vicon Motion Capture in Internet of Things." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 374–82. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-36402-1_40.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Nguyen, Trung, Linh Tao, Tinh Nguyen, and Tam Bui. "Improved Exoskeleton Human Motion Capture System." In Advances in Asian Mechanism and Machine Science, 669–79. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-91892-7_64.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Tokiwa, Takuji, Masashi Yoshidzumi, Hideaki Nii, Maki Sugimoto, and Masahiko Inami. "Motion Capture System Using an Optical Resolver." In Human-Computer Interaction. Ambient, Ubiquitous and Intelligent Interaction, 536–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02580-8_59.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Azad, Pedram. "Stereo-Based Markerless Human Motion Capture System." In Cognitive Systems Monographs, 147–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-04229-4_7.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Shen, Yuhong, Chenming Li, Xiyu Bi, and Huilin Wei. "Design and Development of Human Motion Capture System." In Man-Machine-Environment System Engineering, 226–33. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4786-5_32.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Jędrasiak, Karol, Łukasz Janik, Andrzej Polański, and Konrad Wojciechowski. "Vicon Motion Capture and HD 1080 Standard Video Data Fusion Based on Minimized Markers Reprojection Error." In Advances in Intelligent and Soft Computing, 209–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23154-4_24.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Takahashi, Kenichi, and Hiroaki Ueda. "A Dance Synthesis System Using Motion Capture Data." In Knowledge Acquisition: Approaches, Algorithms and Applications, 208–17. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01715-5_18.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Nan, Zhang, Shunyan Sun, Jiankang Wu, Xiaoli Meng, and Guanhong Tao. "A Real-Time Micro-sensor Motion Capture System." In Communications in Computer and Information Science, 685–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36252-1_64.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Volná, Eva, Robert Jarušek, Martin Kotyrba, and Daniel Rucký. "Dynamical Motion Capture System Involving via Neural Networks." In Chaos, Complexity and Leadership 2012, 563–68. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7362-2_62.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Vicon motion capture system"

Tang, Qiu, Chenxiao Cai, and Lei Ma. "An Improved Formation Control Algorithm in Vicon 3D Motion Capture System." In 2016 International Conference on Energy, Power and Electrical Engineering. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/epee-16.2016.60.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bai, Yahui, Huimin Hu, Yinxia Li, Chaoyi Zhao, Ling Luo, and Rui Wang. "Research Methods for Human Activity Space Based on Vicon Motion Capture System." In 2017 5th International Conference on Enterprise Systems (ES). IEEE, 2017. http://dx.doi.org/10.1109/es.2017.40.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Dongo, Ricardo, Miguel Moscoso, Rocio Callupe, Jessica Pajaya, and Dante Elias. "Normal human gait patterns in Peruvian individuals: an exploratory assessment using VICON motion capture system." In 13th International Symposium on Medical Information Processing and Analysis, edited by Jorge Brieva, Juan David García, Natasha Lepore, and Eduardo Romero. SPIE, 2017. http://dx.doi.org/10.1117/12.2285978.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Barzilay, O., and A. Wolf. "A Virtual Adaptive Biofeedback System for Neuromuscular Rehabilitation." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59363.

Повний текст джерела

Анотація:

The purpose of this research is to enhance the methods used in biomechanical rehabilitation by combining virtual reality, motion capture and biofeedback instrumentation. During training the subject is wearing a head-mounted helmet, in which virtual tasks (i.e. motions) are displayed to him. During training, the patient is asked to follow target motions which are displayed to him and match his own movement to them. During training the patient kinematics and electromyograms (E.M.G.) signals are being tracked by Vicon Motion tracking system. We use an intelligent learning system to learn, on-line patient performance. For training, we use kinematics and electromyogram data provided by the Vicon motion system. Once trained, the system changes and adapts the tasked displayed to the subject for better patient-specific neuromuscular rehabilitation. Moreover, the system creates a more entertaining environment also resulting in a more efficient physiotherapy in adults and especially in pediatric. Besides physiotherapy, this system can be used in other applications, such as performance enhancement in sports training and as an educational tool in any application requiring precise movement and coordination.

Стилі APA, Harvard, Vancouver, ISO та ін.

Bailey, Stephen W., and Bobby Bodenheimer. "A comparison of motion capture data recorded from a Vicon system and a Microsoft Kinect sensor." In the ACM Symposium. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2338676.2338703.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Udochkina, Larisa, Timur Galushko, and Olga Vorontcova. "Biomechanical of knee joint during gait cycle." In Innovations in Medical Science and Education. Dela Press Publishing House, 2022. http://dx.doi.org/10.56199/dpcsms.digt2472.

Повний текст джерела

Анотація:

The purpose of this work is to study the angular displacement and kinematics of the knee joint during walking. and spatio-temporal gait characteristics using motion capture data analysis, based on the observation of a group of healthy young adults. The angles of knee joint were registered for 29 young men at age 18-35. Was used Vicon motion capture system consisting of 10 cameras T40, AMTI platforms and Vicon Polygon and Vicon Nexus software. Results. The amplitude of knee joint flexion was 54.2±0.9°; knee axis rotation - 8.9±0.9°; lateral knee displacement - 11.9±0.9°. A relationship was found between flexion and extension of the knee joint and rotation of the hip joint. The relevant time-spatial gait parameters in the stance and swing phase, movement amplitude of the knee should be taken into account when choosing the best treatment. The data obtained in this study can be used as a normative basis for research in the early diagnosis of pathologies of the musculoskeletal system.

Стилі APA, Harvard, Vancouver, ISO та ін.

Tran, Truong X., Chang-kwon Kang, and Shannon L. Mathis. "Lower-Gait Tracking Mobile Application: A Case Study of Lower body Motion Capture Comparison Between Vicon T40 System and Apple Augmented Reality." In 2020 IEEE International Conference on Bioinformatics and Biomedicine (BIBM). IEEE, 2020. http://dx.doi.org/10.1109/bibm49941.2020.9313201.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ghosh, Shramana, Hyosang Moon, and Nina P. Robson. "Reconstructing Humans’ Hand Motion: Preliminary Results and Applications in the Design of Mechanical Fingers for Anthropomorphic Tasks." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-13700.

Повний текст джерела

Анотація:

This paper reports the development of a low-cost sensor-based glove device using commercially available components that can be used to obtain position, velocity and acceleration data for individual fingers of the hand. Optical tracking of the human hand and finger motion is a challenging task due to the large number of degrees of freedom (DOFs) packed in a relatively small space. We propose methods to simplify the hand motion capture by utilizing accelerometers and adopting a reduced marker protocol. The preliminary results show that the use of relative position, velocity and acceleration homogeneous transformations enable us in getting improved finger motion data with respect to those obtained from a Vicon system. This data is directly related to contact and curvature constraints between the fingers and the grasped object. Once obtained from the glove, the higher derivative specifications are used in formulating the synthesis task for the design of robotic fingers.

Стилі APA, Harvard, Vancouver, ISO та ін.

Dianov, Sergey, Larisa Udochkina, Olga Vorontcova, and Pavel Gureev. "Influence of forefoot deformities on the gait cycle." In Innovations in Medical Science and Education. Dela Press Publishing House, 2022. http://dx.doi.org/10.56199/dpcsms.xkyr1542.

Повний текст джерела

Анотація:

Modern treatment of foot deformities made it possible to increase the positivity of the outcomes of their surgical treatment. Surgical correction of anatomical distortions significantly improves the supporting and motor functions of the foot. To achieve this goal are widely used in various corrective interventions on the anterior section of the foot. The abundance of methods for these operations indicates that there are no optimal standards to date. The influence of bone and articular changes to locomotion and dynamics of movements of the lower extremities remains largely unexplored. Expanding the diagnosis of dynamic changes in the gait cycle as a result of deformity of the forefoot can help optimize the choice of correction method. This will give the potential to determine the indications for a particular method of restoring the correctness of anatomical relationships. Therefore, diagnostics of the transformation of the gait cycle with deformations of the forefoot is of undoubted interest. The purpose of the study is to evaluate the biomechanical features of movement of a person with anterior foot deformity, pain syndrome caused by deformity, and to explain the influence of the deformed foot shape on the change of individual phases of the gait cycle. To find out the changes in the walking function, we used a three-dimensional video analysis method. The main group was represented by 29 patients with anterior deformity of feet. The research was organized in 2018-2020. The average age was 51.3±16.5 years (from 20 to 80 years female patients were 29 (96.7%)). The control group consisted of 22 healthy women without foot deformities, with an average age of 45.4±15.5 years. The tool base of the research was the Vicon motion capture system (digital infrared cameras Vicon T40-10 PCs., video cameras Vicon bonita 720-2 PCs., dynamometer platform AMTI – 2 PCs., software Vicon Nexus, Vicon Polygon). The study used a full Body Plugin Gate (URM-FRM) skeletal model consisting of 39 reflective markers arranged in a certain order on the human body. The analysis of kinematic data revealed that all 29 studied patients had violations of biomechanics of movements in the joints of the lower extremities. There was an increase in the time of double support by 22.2% from 0.21±0.057 s for the control group to 0.27±0.064 s for the main group. Video analysis allowed us to combine the data obtained using computer graphical visualization of movements with the indicators of the support reaction force and the speed of movement of the lower extremities in patients with foot deformities, as well as to reveal the internal architecture of the gait cycle.

Стилі APA, Harvard, Vancouver, ISO та ін.

Huang, Cunjun, Pradip N. Sheth, and Kevin P. Granata. "Multibody Dynamics Integrated With Muscle Models and Space-Time Constraints for Optimization of Lifting Movements." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85385.

Повний текст джерела

Анотація:

A multibody dynamics model integrated with space-time constraints based optimization is presented in this paper for generating optimal trajectories of human lifting movements. “Space-time constraints” is a two-point boundary value dynamic optimization technique developed for animation of computer graphics characters and has a significant potential for biomechanics and other mechanical movement based dynamic optimization problems. Optimization results demonstrate the ability to consider different preferences for minimizing the loading of specific joints such as an ankle, or a knee, or a shoulder during the lifting motion and the resulting lifting trajectories are shown to be different. Lumped muscle models to generate the joint torques are incorporated at five joints to model the actuation effects of the muscular system during the dynamic movement. The dynamic optimization is then based on the muscle activation parameters instead of the traditionally used joint torques. The muscle activation model optimization is shown to correlate better with the actual motion tests conducted by the VICON video capture and test data analysis system.

Стилі APA, Harvard, Vancouver, ISO та ін.

Звіти організацій з теми "Vicon motion capture system"

Tao, Yang, Amos Mizrach, Victor Alchanatis, Nachshon Shamir, and Tom Porter. Automated imaging broiler chicksexing for gender-specific and efficient production. United States Department of Agriculture, December 2014. http://dx.doi.org/10.32747/2014.7594391.bard.

Повний текст джерела

Анотація:

Extending the previous two years of research results (Mizarch, et al, 2012, Tao, 2011, 2012), the third year’s efforts in both Maryland and Israel were directed towards the engineering of the system. The activities included the robust chick handling and its conveyor system development, optical system improvement, online dynamic motion imaging of chicks, multi-image sequence optimal feather extraction and detection, and pattern recognition. Mechanical System Engineering The third model of the mechanical chick handling system with high-speed imaging system was built as shown in Fig. 1. This system has the improved chick holding cups and motion mechanisms that enable chicks to open wings through the view section. The mechanical system has achieved the speed of 4 chicks per second which exceeds the design specs of 3 chicks per second. In the center of the conveyor, a high-speed camera with UV sensitive optical system, shown in Fig.2, was installed that captures chick images at multiple frames (45 images and system selectable) when the chick passing through the view area. Through intensive discussions and efforts, the PIs of Maryland and ARO have created the protocol of joint hardware and software that uses sequential images of chick in its fall motion to capture opening wings and extract the optimal opening positions. This approached enables the reliable feather feature extraction in dynamic motion and pattern recognition. Improving of Chick Wing Deployment The mechanical system for chick conveying and especially the section that cause chicks to deploy their wings wide open under the fast video camera and the UV light was investigated along the third study year. As a natural behavior, chicks tend to deploy their wings as a mean of balancing their body when a sudden change in the vertical movement was applied. In the latest two years, this was achieved by causing the chicks to move in a free fall, in the earth gravity (g) along short vertical distance. The chicks have always tended to deploy their wing but not always in wide horizontal open situation. Such position is requested in order to get successful image under the video camera. Besides, the cells with checks bumped suddenly at the end of the free falling path. That caused the chicks legs to collapse inside the cells and the image of wing become bluer. For improving the movement and preventing the chick legs from collapsing, a slowing down mechanism was design and tested. This was done by installing of plastic block, that was printed in a predesign variable slope (Fig. 3) at the end of the path of falling cells (Fig.4). The cells are moving down in variable velocity according the block slope and achieve zero velocity at the end of the path. The slop was design in a way that the deacceleration become 0.8g instead the free fall gravity (g) without presence of the block. The tests showed better deployment and wider chick's wing opening as well as better balance along the movement. Design of additional sizes of block slops is under investigation. Slops that create accelerations of 0.7g, 0.9g, and variable accelerations are designed for improving movement path and images.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!