Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"optical tracking"”.
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Optical Tracking and Spectral Characterization of Cubesats for Operational Missions
… objects using a worldwide network of radar and optical sensors. However, in order to better protect space assets, there has been increased interest in not just knowing where a space object is, but what the object is. The optical and spectral characteristics of solar light reflected off of …
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Operando Optical Tracking of Ion Dynamics and Degradation in Battery Electrodes
… introduces and establishes a laboratory-based optical scattering microscopy methodology to resolve lithium-ion dynamics in individual active particles, under operating conditions. First we apply this technique to follow cycling of the archetypical cathode material LiCoO₂ (LCO). We visualise the …
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Comparing Measured and Theoretical Target Registration Error of an Optical Tracking System
… is to experimentally measure the accuracy of an optical tracking system used in commercial surgical navigation systems. We measure accuracy by constructing a mechanism that allows a tracked target to move with spherical motion (i.e., there exists a single point on the mechanism—the center of the …
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Geosynchronous satellite maneuver detection and orbit recovery using ground based optical tracking
… orbit. This study uses angles only ground based optical tracking to detect maneuvers and recover orbits for geosynchronous satellites. Using the Analytical Graphics Inc. Orbit Determination Tool Kit sequential estimation software, a sequential estimation filter was "tuned" and validated in …
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A multiple optical tracking based approach for enhancing hand-based interaction in virtual reality simulations
… interaction has seen significant success in optical tracker-based approaches, enabling users to freely interact using their hands. Optical based trackers can provide users with real-time, high-fidelity virtual hand representations for natural interaction and an immersive experience. However, …
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PROSPECTIVE HEAD MOVEMENT CORRECTION FOR HIGH-RESOLUTION MRI USING AN IN-BORE OPTICAL TRACKING SYSTEM
… head motion during data acquisition, an in-bore optical motion tracking system is proposed. The system comprises one or two MR compatible infrared cameras that are fixed on a holder right above and in front of the head coil. The resulting close proximity of the cameras to the object allows …
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Biomechanical Validation of Skeletal Tracking Data and Developing Action Recognition Models for Basketball: A Baseline for NBA Officiating Tools
Optical tracking technology in sports has advanced rapidly in recent years, enabling new opportunities for data-driven analysis and tools to enhance the game. This study presents a framework for processing and analyzing a new skeletal tracking dataset collected from NBA basketball games. The …
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An articulated drill and hybrid tracking navigation system for orthopaedic surgery
… However, in robotic orthopaedic surgery with tracking and navigation system, the femoral stem insertion depends on hand-rasping method and confirmation of position by placing tracking marker at the neck shaft of femoral stem after insertion. Besides that, femoral milling with navigation for …
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Design of Electromechanical Attachments for Improved Ultrasound Imaging Repeatability
… performance was experimentally validated. An optical tracking module was incorporated for estimating the probe’s 6 degrees of freedom and its performance was quantified. Electronic hardware and a Robot Operating System (ROS) network were developed to synchronize the three attachments for …
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A novel video game peripheral for detecting fine hand motion and providing haptic feedback
… of a game controller glove that employs optical tracking technology to detect movement of the hand and fingers. The vision algorithm captures an image from a webcam in real-time and determines the centroids of colored sections on a glove worn by the player; assigning a distinctive …
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Underwater optical measurement of position and orientation using a prepared, passive target
… for the JASON remotely operated vehicle, an optical tracking method is investigated. The method needs to be accurate enough for underwater control and fast enough to enable timely control. The method presented solves the camera location problem in a closed form and is accurate for accurate …
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Spring Stepper: a makerspace controller for seated hands-free locomotion in virtual reality
… (VR), such as head-mounted displays (HMD) and optical tracking, has been advancing at an unprecedented rate, there is currently a lack of suitable hands-free locomotion devices for VR, with most existing locomotion solutions involving complex, high-cost systems. This thesis presents the Spring …
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Analysis of human coordination patterns between a younger and older age group during the timed up and go test
… was captured using both IMU sensors and an optical tracking system. Only data from the optical method was processed and analyzed for this thesis. The participants executed several trials of a Timed-Up-and-Go test (TUGT), a 10 meter Walk Test (10MWT), and a Standing Balance Test (SBT). This …
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The Bio-Mechanical Development and Kinematic Evaluation of Zone I and Zone II Injuries and their Corresponding Surgical Repair Techniques using an In-Vitro Active Finger Motion Simulator: A Cadaveric Study
… within the finger. Accuracy of electromagnetic tracking (EM) systems were evaluated compared to the standard optical tracking systems and used to develop motion derived finger joint coordinate systems. Moreover, minute strain gauges were utilized to measure strains induced by the volar plate. …
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ZeroN : mid-Air tangible interaction enabled by computer controlled magnetic levitation
… magnet in 3D space. This is combined with an optical tracking and display system that projects images on the levitating object. In this thesis, I present interaction techniques and applications developed in the context of this system. Finally, I discuss initial observations and implications, …
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Player motion analysis : automatically classifying NBA plays
… a set of NBA plays using data from the SportVU optical tracking system, which tracks the position of each player and the ball 25 times per second. The problem is made challenging by the variations in how a play is run, the high proportion of possessions where no set play is run, the variance in …
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Interferometric Scattering Microscopy: Theory, Simulation, and Experiment
… questions through the lens of a specialized optical microscopy technique known as interferometric scattering (iSCAT), first demonstrated in the early 2000s. To establish the theoretical limits of nanoscale optical tracking, I derive theories of iSCAT imaging yielding fully quantitative …
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Biomechanical evaluation of user fatigue during burring with the MAKO RIO surgical system
… causes of this fatigue. A testing protocol of optical tracking, EMG and a force transducer was developed to assess users performing repetitive burring stages of the surgery. The output from the assessment showed high levels of muscle activity, poor posture and large forces that ultimately led …
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A vision based control system for autonomous rendezvous and capture of a Mars Orbital Sample
… project is to design and develop a vision-based tracking and capture system using the SPHERES test bed. The proposed Mars Orbital Sample Return (MOSR) system uses a SPHERES satellite to emulate the combined motion of the capture satellite and the OS. The key elements of the system are: (1) a …
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Control Strategies for Machining with Industrial Robots
… second approach uses online measurements from an optical tracking system to suppress position deviations. In milling experiments performed in aluminium, the absolute accuracy was increased by up to a factor of approximately 6 and 9, for the two approaches, respectively. Robotic machining is often …
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