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Adaptive compensation for an optical tracking telescope
Automatica, 1974The application of model referenced adaptive control theory to an optical tracking telescope is discussed. The capability of the adaptive technique to compensate for mount irregularities such as inertial variations and bearing friction is demonstrated via field test results on a large tracking telescope.
James W. Gilbart, George C. Winston
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Large-Scale Optical Tracking System
2019 IEEE International Symposium on Mixed and Augmented Reality Adjunct (ISMAR-Adjunct), 2019A large-scale optical tracking system is proposed in this paper. It uses synchronous laser coding to realize optical locating. Inertial sensors are integrated to assist the calculation of 6-DOF pose. The encoding of the base station in the system can be customized and we designed a specific layout of base stations to prevent signal interference.
Dong Li 0013 +3 more
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Optical video disks with undulating tracks
Applied Optics, 1978The signal components of a video signal (luminance, color, and sound) are modulated on a main carrier and several subcarriers and then recorded on the video master disk. Apart from the signal distortion that can arise during master and disk manufacture, the optical readout of the disk also yields a nonlinear transfer of the signal.
J J, Braat, G, Bouwhuis
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Estimating optical flow by tracking contours
Pattern Recognition Letters, 1997Abstract We present a novel method of velocity field estimation for the points on moving contours in a 2-D image sequence. The method determines the corresponding point in a next image frame by minimizing the curvature change of a given contour point. As a first step, snakes are used to locate smooth curves in 2-D imagery.
Park, JS, Han, JH
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Multitarget-tracking optical processing system
Applied Optics, 1994We consider multitarget tracking, estimating the state vector (two-dimensional position and velocity) of each target from physical measurements. We consider a full system for this and the role for analog optical processing within its subsystems. We emphasize the neural network data-association subsystem (which associates measurements in the present ...
D, Casasent, M, Yee
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Journal of Jet Propulsion, 1956
AS GUIDED missiles and rockets are developed, tested, improved, and retested, the tracking equipment which records their trajectory through space must undergo the same pattern of change and improvement. This equipment is highly specialized and its design requires an intimate knowledge of three fields: optics, electronics, and mechanics.
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AS GUIDED missiles and rockets are developed, tested, improved, and retested, the tracking equipment which records their trajectory through space must undergo the same pattern of change and improvement. This equipment is highly specialized and its design requires an intimate knowledge of three fields: optics, electronics, and mechanics.
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Digitalized Ultrasonic Inspection By Optical Tracking
2019 IEEE/SICE International Symposium on System Integration (SII), 2019The digitalization of conventional ultrasonic inspection processes for large castings like e.g. gas turbine casings enables an efficient use of various standardized evaluation methods. Thus, digitalization enhances the quality of inspection and reduces the production scrape rate.
Robert H. Schmitt +5 more
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Optical flow-based probabilistic tracking
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings., 2003In this paper, we present an observation model to track objects using particle filter algorithms based on matching techniques for computing optical flow. Although optical flow information enables us to know the displacement of objects present in a scene, it cannot be used directly to displace an object model since flow calculation techniques lack the ...
Manuel J. Lucena +4 more
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Optical approach for iris segmentation and tracking
2016 4th IEEE International Colloquium on Information Science and Technology (CiSt), 2016In this paper, an autonomous active contour model based on the optical correlation algorithm is proposed. Optical correlation is used to calculate iris and pupil areas with a digital simulation of the Vander Lugt correlator. This area term computation assists the model to define an initial contour and at a later stage, to calculate terms in the energy ...
Elhoussaine Ouabida +2 more
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Advantages of Optical Compared with Electromagnetic Tracking
Journal of Bone and Joint Surgery, 2009Tracking systems are critical to all types of computer-assisted image-guided intervention. Many technologies exist; however, only optical and electromagnetic systems are widely used commercially. In orthopaedic applications, optical systems dominate because of the large working volume and accuracy, but these systems suffer from deficiencies due to line
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