Results 41 to 50 of about 602,338 (125)

A Fast and Simple Method for Absolute Orientation Estimation Using a Single Vanishing Point

Applied Sciences, 2022
Absolute orientation estimation is one of the key steps in computer vision, and n 2D–3D point correspondences can be used to obtain the absolute orientation, which is known as the perspective-n-point problem (PnP).
Kai Guo, Hu Ye, Junhao Gu, Ye Tian
doaj   +1 more source

Extension of the Rigid-Constraint Method for the Heuristic Suboptimal Parameter Tuning to Ten Sensor Fusion Algorithms Using Inertial and Magnetic Sensing

Sensors, 2021
The orientation of a magneto-inertial measurement unit can be estimated using a sensor fusion algorithm (SFA). However, orientation accuracy is greatly affected by the choice of the SFA parameter values which represents one of the most critical steps.
Marco Caruso, Angelo Maria Sabatini, Marco Knaflitz, Ugo Della Croce, Andrea Cereatti   +4 more
doaj   +1 more source

Machine Learning to Improve Orientation Estimation in Sports Situations Challenging for Inertial Sensor Use

Frontiers in Sports and Active Living, 2021
In sports, inertial measurement units are often used to measure the orientation of human body segments. A Madgwick (MW) filter can be used to obtain accurate inertial measurement unit (IMU) orientation estimates.
Marit P. van Dijk, Marit P. van Dijk, Manon Kok, Monique A. M. Berger, Marco J. M. Hoozemans, DirkJan H. E. J. Veeger   +5 more
doaj   +1 more source

Influence of skull conductivity perturbations on EEG dipole source analysis [PDF]

, 2010
PURPOSE: Electroencephalogram (EEG) source analysis is a noninvasive technique used in the presurgical of epilepsy. In this study, the dipole location and orientation errors due to skull conductivity perturbations were investigated in two groups of three-
Awada, Bashar, Baumann, Baysal, Chauveau, Cohen, de Munck, Fangmin Chen, Ferree, Geddes, Gonçalves, Güellmar, Hallez, Hallez, Hans Hallez, Huiskamp, Kosterich, Laarne, Lai, Law, Nicholson, Oostendorp, Pohlmeier, Press, Rush, Rush, Steven Staelens, Sutherling, van den Broek, Vanrumste, Zhang   +30 more
core   +1 more source

Global orientation estimation in noisy conditions

Acta Neurobiologiae Experimentalis, 2015
The present paper studies the perceived orientation of line patterns with variable elongation, line length, orientation jitter, and presentation time. It evaluates whether the internal noise and sampling efficiency evaluated by equivalent noise paradigm (Pelli 1981) depend on the spatial configuration and temporal characteristics of the stimulation ...
Nadejda, Bocheva, Simeon, Stefanov, Miroslava, Stefanova, Bilyana, Genova   +3 more
openaire   +2 more sources

Influence of Sampling Rate on Wearable IMU Orientation Estimation Accuracy for Human Movement Analysis

Sensors
Wearable inertial measurement units (IMUs) have been widely used in human movement analysis outside the laboratory. However, the IMU-based orientation estimation remains challenging, particularly in scenarios involving relatively fast movements ...
Bingfei Fan, Luobin Zhang, Shibo Cai, Mingyu Du, Tao Liu, Qingguo Li, Peter Shull   +6 more
doaj   +1 more source

Analysis of the Accuracy of Ten Algorithms for Orientation Estimation Using Inertial and Magnetic Sensing under Optimal Conditions: One Size Does Not Fit All

Sensors, 2021
The orientation of a magneto and inertial measurement unit (MIMU) is estimated by means of sensor fusion algorithms (SFAs) thus enabling human motion tracking. However, despite several SFAs implementations proposed over the last decades, there is still a
Marco Caruso, Angelo Maria Sabatini, Daniel Laidig, Thomas Seel, Marco Knaflitz, Ugo Della Croce, Andrea Cereatti   +6 more
doaj   +1 more source

A Hyperhemispherical Grid Filter for Orientation Estimation

2020 IEEE 23rd International Conference on Information Fusion (FUSION), 2020
Estimating orientations of objects in Euclidean space is an omnipresent challenge in robotics and autonomous systems. A useful representation of orientations involves unit quaternions. While the space of all unit quaternions forms a three-dimensional unit hypersphere, inverting the sign of a quaternion does not change the orientation described by it ...
Pfaff, Florian, Li, Kailai, Hanebeck, Uwe D.   +2 more
openaire   +5 more sources

Curved Gabor Filters for Fingerprint Image Enhancement

, 2012
Gabor filters play an important role in many application areas for the enhancement of various types of images and the extraction of Gabor features. For the purpose of enhancing curved structures in noisy images, we introduce curved Gabor filters which ...
Gottschlich, Carsten
core   +1 more source

Accurate position tracking with a single UWB anchor

, 2020
Accurate localization and tracking are a fundamental requirement for robotic applications. Localization systems like GPS, optical tracking, simultaneous localization and mapping (SLAM) are used for daily life activities, research, and commercial ...
Beltrame, Giovanni, Cao, Yanjun, Knoll, Alois, Li, Rui, Yang, Chenhao   +4 more
core   +1 more source