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Filters
Dense Optical Flow Field Estimation Using Recursive Lms Filtering
2006
Zenodo
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On the other hand, optical flow estimation methods aim to obtain a velocity field using the computation of spatial and temporal image derivatives. ...
Two different approaches for motion estimation have been separately developed; i. e. image based discrete motion estimation (block matching), and gradient based techniques, or optical flow estimation. ...
doi:10.5281/zenodo.52883
fatcat:gyapsi5etrg35bakpfmhfhuvui
Dense Optical Flow Field Estimation Using Recursive Lms Filtering
2006
Zenodo
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On the other hand, optical flow estimation methods aim to obtain a velocity field using the computation of spatial and temporal image derivatives. ...
Two different approaches for motion estimation have been separately developed; i. e. image based discrete motion estimation (block matching), and gradient based techniques, or optical flow estimation. ...
doi:10.5281/zenodo.39934
fatcat:wegh3vl52zaulas3mmaztlwyke
Binocular Image Sequence Analysis: Integration of Stereo Disparity and Optic Flow for Improved Obstacle Detection and Tracking
2008
EURASIP Journal on Advances in Signal Processing
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The first algorithm is to impose the optic flows as extra constraints for stereo matching. ...
The second algorithm is to use a Kalman filter as a mixer to combine the distance measurement and the motion displacement measurement for object tracking. ...
Since true motion fields are not accessible, optical flow representing the displacement of corresponding points in consecutive images is used as an approximation. ...
doi:10.1155/2008/843232
fatcat:ejzk64nhmna6xpproxrw3v4weu
Enhancements of SDR-Based FPGA System for V2X-VLC Communications
2021
Computers Materials & Continua
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recursive least squares (QR-RLS) algorithms. ...
The best results were achieved using the QR-RLS algorithm. ...
By using this laser and photodetector, the various power levels were measured as a function of time. This way it could be at least estimated how dense the fog was. ...
doi:10.32604/cmc.2021.017333
fatcat:hjwpevzo5remrbhtzjfn2zk7pq
Microscale flow visualization
2004
Microfluidics and Nanofluidics
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A variety of methods for microscale flow visualization have appeared and evolved since the late 1990s. ...
Advances in microfluidic and nanofluidic technologies have been paralleled by advances in methods for direct optical measurement of transport phenomena on these scales. ...
Other advancements have included data filtering (Etoh and Takehara 1995) and recursive techniques (Hart 1998) . ...
doi:10.1007/s10404-004-0009-4
fatcat:rzn3nzkpg5fvvec3fdrhehf6ze
Seven tuning schemes for an ADALINE model to predict floor pressures in a subsonic cavity flow
2009
Transactions of the Institute of Measurement and Control
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The process under investigation is a subsonic cavity flow system. The experimental data obtained from the system is post-processed to obtain a useful predictor. ...
Seven algorithms are studied, including the least mean squares (LMS), recursive least squares (RLS), modified Kaczmarz's algorithm (MK), stochastic approximation algorithm (SA), gradient descent (GD), ...
in Figure 3 to affect the flow field in the test section. ...
doi:10.1177/0142331208090964
fatcat:q4bfmhp27zf5pelon77i6njk4e
Stereo Visual Inertial Pose Estimation Based on Feedforward-Feedback Loops
[article]
2020
arXiv
pre-print
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Compared to the widely used filter-based or optimization-based approaches, the pose estimation process is modeled as a control system. ...
In this paper, we present a novel stereo visual inertial pose estimation method. ...
This is used to track the features between stereo images with the Lucas-Kanade optical flow [36] and then to triangulate tracked point pairs [37] . ...
arXiv:2007.02250v2
fatcat:ybk222u5s5dbzcumc3wugi6mri
Basics and principles of particle image velocimetry (PIV) for mapping biogenic and biologically relevant flows
2006
Aquatic Ecology
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Acknowledgements Jan Drent assisted in recording of the bivalve flow fields, Michiel Vos recorded the barnacle flow fields, Sandra Nauwelaerts recorded the vortex ring flow fields (cooperation with the ...
University of Antwerp), Luca van Duren and Per Jonson are acknowledged for the invitation to the BIO-FLOW-2002 symposium. ...
This prevents the implementation of 'repair' routines such as windowoffsetting in which a first FFT-cycle is used to get a first estimate of the particle displacement and a second cycle at the estimated ...
doi:10.1007/s10452-005-6567-z
fatcat:dhlfy3jzkveerpzzir3ouy2sxy
PEDESTRIAN DETECTION BY LASER SCANNING AND DEPTH IMAGERY
2016
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Pedestrian flow is much less regulated and controlled compared to vehicle traffic. Estimating flow parameters would support many safety, security or commercial applications. ...
The paper includes accuracy analysis of the estimated parameters based on video footage as reference. ...
(Gate and Nashashibi, 2008) have improved the pedestrian classification accuracy by recursive estimation. (Kisfaludi, 2004) used security camera images to detect pedestrian passing. ...
doi:10.5194/isprsarchives-xli-b3-465-2016
fatcat:355fbzjrbfbmxp4m7v2n36tznu
Application Challenges from a Bird's-Eye View
[chapter]
2017
Computer Vision in Vehicle Technology
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Computer Vision in Vehicle Technology focuses on computer vision as on-board technology, bringing together fields of research where computer vision is progressively penetrating: the automotive sector, ...
canyon by balancing the optical flow on both sides of the robot field of view). ...
Image points are triangulated from multiple views using recursive Bayesian estimation. ...
doi:10.1002/9781118868065.ch6
fatcat:fsljmro5izhh5mp4z3hcrgstby
PEDESTRIAN DETECTION BY LASER SCANNING AND DEPTH IMAGERY
2016
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Pedestrian flow is much less regulated and controlled compared to vehicle traffic. Estimating flow parameters would support many safety, security or commercial applications. ...
The paper includes accuracy analysis of the estimated parameters based on video footage as reference. ...
(Gate and Nashashibi, 2008) have improved the pedestrian classification accuracy by recursive estimation. (Kisfaludi, 2004) used security camera images to detect pedestrian passing. ...
doi:10.5194/isprs-archives-xli-b3-465-2016
fatcat:awmzkuj2nndn3fq2bsktenj4he
Nonlinear compensation for indoor visible light communication systems with carrierless amplitude and phase modulation
2019
Japanese Journal of Applied Physics
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In fact, there are several algorithms which can update weights adaptively, such as LMS equalization and recursive least squares (RLS) equalization. ...
A current will flow through the LED when an external voltage greater than the threshold voltage. ...
doi:10.7567/1347-4065/ab1fd8
fatcat:bitjskszn5c4zkqmru6bssvjhy
Towards an automatic parking system using bio-inspired 1-D optical flow sensors
2015
2015 IEEE International Conference on Vehicular Electronics and Safety (ICVES)
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We therefore investigated how Local Motion Sensors (LMSs) [13], [14] , comprising only of a few pixels giving 1-D optical flow (OF) measurements could be used to improve automatic parking maneuvers. ...
The algorithm used was composed of 5 processing steps, which will be described here in detail. ...
By measuring this time lag, the optical flow can be computed as follows: ω(t) = ∆ϕ τ (t) [22] . ...
doi:10.1109/icves.2015.7396901
dblp:conf/icves/MafricaSR15
fatcat:krgc67sswbat7c6dx75gvhrvqu
Improved Dynamic Obstacle Mapping (iDOMap)
2020
Sensors
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The DOMap has been extended in three key points: first the LIDAR reflectivity remission is used to make more robust the matching in the optical flow of the detection stage, secondly static and a dynamic ...
occlusion detectors have been proposed, and finally a tracking stage based on Particle Filter (PF) has been used to deal with robots and people as dynamic obstacles. ...
detect the obstacles positions and (2) a method to estimate the velocity of these obstacles using a tracking stage based on optical flow and a detection stage based on blob filtering. ...
doi:10.3390/s20195520
pmid:32993193
fatcat:a3jel7ttrra6nlwkwklpsk6qgu
A comparative study of changes in the Lambert Glacier/Amery Ice Shelf system, East Antarctica, during 2004–2008 using gravity and surface elevation observations
2016
Journal of Glaciology
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In many high flow-speed glacier areas, negative mass change rates may be caused by dynamic ice flow discharges that have surpassed the snow accumulation. ...
In the high-elevation inland region, a positive trend was estimated from both ICESat and GRACE data, which is in line with the CHINARE accumulation measurements. ...
using a Fan filter instead of a Gaussian filter. ...
doi:10.1017/jog.2016.76
fatcat:bdwzqzarabedlc6am5jo5sah7y
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