Results 31 to 40 of about 158,670 (292)

Augmented reality guidance in cerebrovascular surgery using microscopic video enhancement

Healthcare Technology Letters, 2018
Cerebrovascular surgery treats vessel abnormalities in the brain and spinal cord, including arteriovenous malformations (AVMs) and aneurysms. These procedures often involve clipping the vessels feeding blood to these abnormalities, making accurate ...
Reid Vassallo, Hidetoshi Kasuya, Benjamin W.Y. Lo, Terry Peters, Yiming Xiao   +4 more
doaj   +1 more source

Image Motion Extraction of Structures Using Computer Vision Techniques: A Comparative Study

Sensors, 2021
Vibrational measurements play an important role for structural health monitoring, e.g., modal extraction and damage diagnosis. Moreover, conditions of civil structures can be mostly assessed by displacement responses.
Jau-Yu Chou, Chia-Ming Chang
doaj   +1 more source

Video Acceleration Magnification

, 2017
The ability to amplify or reduce subtle image changes over time is useful in contexts such as video editing, medical video analysis, product quality control and sports. In these contexts there is often large motion present which severely distorts current
Pintea, Silvia L., van Gemert, Jan C., Zhang, Yichao   +2 more
core   +1 more source

Complete Parallax and Proper Motion Solutions For Halo Binary-Lens Microlensing Events [PDF]

, 1998
A major problem in the interpretation of microlensing events is that the only measured quantity, the Einstein time scale t_E, is a degenerate combination of the three quantities one would like to know, the mass, distance, and speed of the lens.
Afonso C., Andrew Gould, Ansari R., Bennett D., Hardy S. J., Nikolay Andronov, Palanque-Delabrouille N., Refsdal S., Udalski A., Udalski A., Zhao H.   +10 more
core   +4 more sources

Finger vein liveness detection using motion magnification [PDF]

2015 IEEE 7th International Conference on Biometrics Theory, Applications and Systems (BTAS), 2015
Finger vein recognition has emerged as an accurate and reliable biometric modality that was deployed in various security applications. However, the use of finger vein recognition also indicated its vulnerability to presentation attacks (or direct attacks).
R. Raghavendra, Manasa Avinash, Sebastien Marcel, Christoph Busch   +3 more
openaire   +1 more source

Vibration-Based Damage Detection in Wind Turbine Blades using Phase-Based Motion Estimation and Motion Magnification

, 2018
Vibration-based Structural Health Monitoring (SHM) techniques are among the most common approaches for structural damage identification. The presence of damage in structures may be identified by monitoring the changes in dynamic behavior subject to ...
Mao, Zhu, Niezrecki, Christopher, Poozesh, Peyman, Sarrafi, Aral   +3 more
core   +1 more source

Amplitude-Based Filtering for Video Magnification in Presence of Large Motion

Sensors, 2018
Video magnification reveals important and informative subtle variations in the world. These signals are often combined with large motions which result in significant blurring artifacts and haloes when conventional video magnification approaches are used.
Xiu Wu, Xuezhi Yang, Jing Jin, Zhao Yang
doaj   +1 more source

Advanced Video-Based Processing for Low-Cost Damage Assessment of Buildings under Seismic Loading in Shaking Table Tests

Sensors, 2023
This paper explores the potential of a low-cost, advanced video-based technique for the assessment of structural damage to buildings caused by seismic loading.
Antonino Cataldo, Ivan Roselli, Vincenzo Fioriti, Fernando Saitta, Alessandro Colucci, Angelo Tatì, Felice Carlo Ponzo, Rocco Ditommaso, Canio Mennuti, Alessandro Marzani   +9 more
doaj   +1 more source

The distribution of microlensed light curve derivatives: the relationship between stellar proper motions and transverse velocity [PDF]

, 1999
We present a method for computing the probability distribution of microlensed light curve derivatives both in the case of a static lens with a transverse velocity, and in the case of microlensing that is produced through stellar proper motions.
Corrigan, E. L. Turner, Foltz, Irwin, J. S. B. Wyithe, Katz, Kundic, Kundic, Lewis, Lewis, Lewis, Paczynski, R. L. Webster, Schmidt, Schramm, Wambsganss, Wambsganss, Witt, Witt, Witt, Wyithe, Wyithe, Wyithe, Wyithe   +23 more
core   +2 more sources

Planetary Microlensing at High Magnification

, 2002
Simulations of planetary microlensing at high magnification that were carried out on a cluster computer are presented. It was found that the perturbations due to two-thirds of all planets occur in the time interval [-0.5t_FWHM, 0.5t_ FWHM] with respect ...
Albrow, Alcock, Bennett, Bennett, Bolatto, Bond, Bond, Bozza, Deeg, Dobcsányi, Dominik, Eccles, Gaudi, Gaudi, Gould, Gould, Griest, Han, Han, Heyrovský, Holz, I. A. Bond, J. Skuljan, Kasting, Kayser, Liebes, Mao, N. J. Rattenbury, P. C. M. Yock, Perryman, Pratt, Rattenbury, Refsdal, Rhie, Schneider, Schneider, Wambsganss, Wetherill   +37 more
core   +2 more sources