Multi-camera object tracking system

2021 ◽  
Author(s):  
A.V. Bobkov ◽  
G.V. Tedeev
Keyword(s):  
High Speed ◽  
Tracking System ◽  
Correlation Method ◽  
Video Camera ◽  
Frame Rate ◽  
Camera Tracking ◽  
Topological Graph ◽  
Coverage Area ◽  
Background Removal ◽  
Detection Stage

The article proposes a multi-camera tracking system for an object, implemented using computer vision technologies and allowing the video surveillance operator in real time to select an object that will be monitored by the system in future. It will be ready to give out the location of the object at any time. The solution to this problem is divided into three main stages: the detection stage, the tracking stage and the stage of interaction of several cameras. Methods of detection, tracking of objects and the interaction of several cameras have been investigated. To solve the problem of detection, the method of optical flow and the method of removing the background were investigated, to solve the problem of tracking — the method of matching key points and the correlation method, to solve the problem of interaction between several surveillance cameras — the method of the topological graph of a network of cameras. An approach is proposed for constructing a system that uses a combination of the background removal method, the correlation method and the method of the topological graph of a network of cameras. The stages of detection and tracking have been experimentally implemented, that is, the task of tracking an object within the coverage area of one video camera has been solved. The implemented system showed good results: a sufficiently high speed and accuracy with rare losses of the tracked object and with a slight decrease in the frame rate.

scholarly journals High Speed Running and Sprinting Profiles of Elite Soccer Players

2017 ◽  
Vol 58 (1) ◽  
pp. 169-176 ◽  
Author(s):  
Javier Miñano-Espin ◽  
Luis Casáis ◽  
Carlos Lago-Peñas ◽  
Miguel Ángel Gómez-Ruano
Keyword(s):  
Physical Performance ◽  
High Intensity ◽  
Repeated Measures ◽  
High Speed ◽  
Tracking System ◽  
Camera Tracking ◽  
The Real ◽  
Multiple Camera ◽  
Repeated Measures Analysis

AbstractReal Madrid was named as the best club of the 20th century by the International Federation of Football History and Statistics. The aim of this study was to compare if players from Real Madrid covered shorter distances than players from the opposing team. One hundred and forty-nine matches including league, cup and UEFA Champions League matches played by the Real Madrid were monitored during the 2001-2002 to the 2006-2007 seasons. Data from both teams (Real Madrid and the opponent) were recorded. Altogether, 2082 physical performance profiles were examined, 1052 from the Real Madrid and 1031 from the opposing team (Central Defenders (CD) = 536, External Defenders (ED) = 491, Central Midfielders (CM) = 544, External Midfielders (EM) = 233, and Forwards (F) = 278). Match performance data were collected using a computerized multiple-camera tracking system (Amisco Pro®, Nice, France). A repeated measures analysis of variance (ANOVA) was performed for distances covered at different intensities (sprinting (>24.0 km/h) and high-speed running (21.1-24.0 km/h) and the number of sprints (21.1-24.0 km/h and >24.0 km/h) during games for each player sectioned under their positional roles. Players from Real Madrid covered shorter distances in high-speed running and sprint than players from the opposing team (p < 0.01). While ED did not show differences in their physical performance, CD (p < 0.05), CM (p < 0.01), EM (p < 0.01) and F (p > 0.01) from Real Madrid covered shorter distances in high-intensity running and sprint and performed less sprints than their counterparts. Finally, no differences were found in the high-intensity running and sprint distances performed by players from Real Madrid depending on the quality of the opposition.

The Research on Phantom-Bit Technology of Digital Phase Shifters for Satellite Tracking System of Phase Array

2014 ◽  
Vol 644-650 ◽  
pp. 4555-4558
Author(s):  
Chao Hai Li ◽  
Wen Xian Jiang ◽  
Guo Long Wang
Keyword(s):  
High Speed ◽  
Phased Array ◽  
Tracking System ◽  
Correlation Method ◽  
Digital Signal ◽  
Satellite Tracking ◽  
Phase Shifters ◽  
Phase Array ◽  
Satellite Platform ◽  
Beam Displacement

Phased array satellite platform self-tracking system is for the stability between the missiles and other high-speed movement of the platform and the relay satellite two-way information transmission needs to carry out the self-tracking technology research of onboard platform-dimensional active phased array satellite. The system uses a sub-array correlation method for accurate measurement of the angle of the satellite signal. Receiving array is divided into four 4 * 4 sub-array, each antenna signal combining unit 4 sub array for 4-way A / D to be converted, through down-conversion, filtering, extraction and other processes to get a digital baseband signal, the baseband digital signal processing is to extract the angle error information into digital beam orientation system for tracking filtering operation, thereby ensuring that the transceiver has been aligned with the satellite antenna beam direction. In this paper ,phantom-bit technology for satellite tracking system under the condition of minimum beam displacement is researched for satellite tracking system.

scholarly journals Justification of the Energy Use of Cedar Husk Waste as an Environmentally Friendly Additive for Co-Combustion with Coal

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7027
Author(s):  
Yankovsky Stanislav ◽  
Tolokol’nikov Anton ◽  
Berezikov Nikolay ◽  
Gubin Vladimir
Keyword(s):  
Ignition Delay ◽  
High Speed ◽  
Energy Use ◽  
Video Camera ◽  
Hydraulic Press ◽  
Frame Rate ◽  
Mixed Fuel ◽  
Industry Waste ◽  
Ignition Delay Times ◽  
Initial Fuel

In this paper, the properties of ignition of mixed fuel pellets formed on the basis of fairly typical energy coal and wood industry waste in the form of cedar husks are experimentally established. The technical characteristics of the initial fuel components and the mixtures based on them, the ignition delay times for different mass concentrations of biomass in coal, and the composition of flue gases formed during the thermal decomposition of these mixed fuels and their base components were determined. Pellets of mixed fuels were made by a hydraulic press. The experiments were performed in an air environment at temperatures from 600 °C to 800 °C. Recording of the processes of pellet ignition and combustion was carried out using a high-speed video camera with an image format of 1024 × 1024 pixels, and a frame rate up to 500 frames per second. The analysis of the flue gas composition was performed using a Test-1 factory gas analyzer (BONER Co.). It was found that the increase in the share of biomass up to 50% in the mixed fuel led to a significant reduction in the ignition delay time to less than 1 s and the sequestration of sulfur oxide emissions by 37.6% and of nitrogen oxides by 3.8% in the studied granular mixed fuels.

An Investigation of Flame Expansion Speed With a Strong Swirl Motion Using High-Speed Visualization

2003 ◽  
Vol 125 (2) ◽  
pp. 485-493
Author(s):  
S. H. Joo ◽  
K. M. Chun ◽  
Y. Shin ◽  
K. C. Lee
Keyword(s):  
High Speed ◽  
Combustion Process ◽  
Flow Characteristics ◽  
Video Camera ◽  
Frame Rate ◽  
Superposition Method ◽  
Linear Superposition ◽  
Compression Stroke ◽  
Engine Cylinder ◽  
Expansion Speed

In this study, a simple linear supposition method is proposed to separate the flame expansion speed and swirl motion of a flame propagating in an engine cylinder. Two series of images of flames propagating in the cylinder with/without swirl motion were taken by a high frame rate digital video camera. A small tube (4 mm ID) was installed inside the intake port to deliver the fuel/air mixture with strong swirl motion into the cylinder. An LDV was employed to measure the swirl motion during the compression stroke. Under the assumption that flame propagates spherically from the each point of the flame front, a diameter of small spherical flames can be calculated from the two consecutive images of the flame without swirl motion in the cylinder. Using the normalized swirl motion of the mixture during the compression stroke and the spherical flame diameters, the flame expansion speed and swirl ratio of combustion propagation in the engine cylinder can be obtained. This simple linear superposition method for separating the flame expansion speed and swirl motion can be utilized to understand the flow characteristics, such as swirl and turbulence, during the combustion process.

scholarly journals EP-1248: A video camera tracking system-based evaluation of SynchronyÆ accuracy

2013 ◽  
Vol 106 ◽  
pp. S471
Author(s):  
Y. Kumazaki ◽  
N. Tsukamoto ◽  
T. Nakamura ◽  
R. Miyakawa ◽  
K. Kinouchi ◽  
...  
Keyword(s):  
Tracking System ◽  
Video Camera ◽  
Camera Tracking

scholarly journals Evaluation of match-running distances covered by soccer players during the UEFA EURO 2016

2019 ◽  
Vol 31 (1) ◽  
pp. 1-4
Author(s):  
A Kubayi
Keyword(s):  
High Speed ◽  
Tracking System ◽  
Soccer Players ◽  
Limited Information ◽  
Camera Tracking ◽  
Multiple Camera ◽  
Shortest Distance ◽  
Significant Difference ◽  
Successful Team ◽  
European Football

Background: Despite a substantial body of literature on match-running distances covered by soccer players in domestic leagues, there appears to be limited information on the Union of European Football Associations (UEFA) Euro competitions.  Objective: The aim of this study was to analyse the match-running distances covered by soccer players during the UEFA Euro 2016.  Methods: A multiple-camera tracking system (InStat Ltd) was used to analyse 228 observations of soccer players who played 15 full matches during the tournament. The outfield players were categorised according to the following playing positions: central defenders (CDs), n=58; wide defenders (WDs), n=45; central midfielders (CMs), n=53, wide midfielders (WMs), n=38; and attackers (ATs), n=34. Data were reported as means with 95% confidence intervals (CI). A one-way analysis of variance (ANOVA) was undertaken to examine the significant differences among players based on playing positions.  Results: The results indicated that the overall total distance covered by players was 10 350 m, ranging from 8 446 m to 12 982 m. ATs covered the longest distance in high-speed running (872 m; 95% CI = 813–931), while CDs covered the shortest distance (542 m; 95% CI = 503–581). A statistically significant difference was observed in high-speed running among players (F (4 223) = 36.92, P=0.001).  Conclusion: The findings of this study provide soccer scientists and coaches with important information to design and implement training sessions in order to elucidate the physical demands of players in view of successful team performance. 

Modeling and Control of Underwater Pan/Tilt Camera Tracking System

2009 ◽  
Author(s):  
Yingfeng Ji ◽  
Ryoichi S. Amano ◽  
Ronald A. Perez
Keyword(s):  
Experimental Study ◽  
High Speed ◽  
Tracking System ◽  
Maximum Velocity ◽  
Turbulence Models ◽  
Hydrodynamic Forces ◽  
Biological Behavior ◽  
Camera Tracking ◽  
Geometry Model ◽  
Underwater Environment

Biologists study on the biological behavior of various marine creatures in situ using underwater observation systems. However, darkness in an underwater environment is always one of the most difficult problems to overcome in order to clearly monitor the life of underwater creatures. In this research, a light-following scheme is proposed with the lighting device installed on a separate Pan/Tilt platform as a slave while the main Pan/Tilt camera platform works as a master. A dynamic model of Pan/Tilt platform was developed using the Lagrange’s equation. In order to achieve high speed manipulation of the Pan/Tilt platforms in underwater environment, hydrodynamic forces have to be considered. Scientists had done a great deal of researches on the hydrodynamic forces of underwater motion bodies. Most of the researches employed the semi-empirical equation based on the experimental study. The coefficients (Cd Cm) of drag and added-mass which were solved by experimental study were the research point of hydrodynamic modeling in previous researches. However, these modeling methods can be employed for the underwater bodies with the simple geometry dimension. Two hydrodynamic torque models which represent the degree of freedoms (DOFs) of panning and tilting respectively had been developed employing CFD software. The selection of turbulence models, i.e., K-E, K-W, SST, RSM and LES, was firstly accomplished using the case of turbulence flow over flat plane. The hydrodynamic torque models are obtained with the simulations results for a certain range of position and velocity values for each of DOFs. The maximum velocity for simulation was set at 60 rpm for each axis. The geometry model which represents the space relationship between the master (camera) and slave (light) and the control algorithms would be elaborated in a separate paper.

scholarly journals Physical performance analysis of elite soccer players during the extra-time periods of the 2016 UEFA Euro Championship

10.17159/4842 ◽  
2018 ◽  
Vol 30 (1) ◽  
pp. 1-3
Author(s):  
A Kubayi
Keyword(s):  
Performance Analysis ◽  
Physical Performance ◽  
High Speed ◽  
Tracking System ◽  
Intervention Strategies ◽  
Soccer Players ◽  
Camera Tracking ◽  
Extra Time ◽  
Performance Profiles ◽  
Time Periods

Background: Despite the importance of extra-time in determining success in the knockout stages of soccer tournaments, there remains scant information on the physical demands of extra time on elite players. Methods: This study investigated the physical performance profiles of all soccer players (N=59) who completed four matches that went to extra time at the 2016 UEFA Euro Championship. Players were categorised as follows: central defenders (CDs), wide defenders (WDs), central midfielders (CMs), wide midfielders (WMs), and attackers (ATs). Match activities were captured using a validated camera tracking system (InStat®). Results: The findings showed that total distances covered by players during matches consistently decreased by 13% from the first half of the game (112.79±10.17 m) to extra time (103.17±6.39 m). The reduction of the total distance covered, especially in high-intensity running (i.e., high-speed running and sprinting), was more apparent in ATs than players in other positions. Conclusion: Intervention strategies needed to sustain soccer players’ physical performance during extra-time periods and of post-match recovery modalities warrant further investigation.

scholarly journals Physical performance analysis of elite soccer players during the extra-time periods of the 2016 UEFA Euro Championship

2018 ◽  
Vol 30 (1) ◽  
pp. 1-3 ◽  
Author(s):  
A Kubayi ◽  
A Toriola
Keyword(s):  
Performance Analysis ◽  
Physical Performance ◽  
High Speed ◽  
Tracking System ◽  
Intervention Strategies ◽  
Soccer Players ◽  
Camera Tracking ◽  
Extra Time ◽  
Performance Profiles ◽  
Time Periods

Background: Despite the importance of extra-time in determining success in the knockout stages of soccer tournaments, there remains scant information on the physical demands of extra time on elite players. Methods: This study investigated the physical performance profiles of all soccer players (N=59) who completed four matches that went to extra time at the 2016 UEFA Euro Championship. Players were categorised as follows: central defenders (CDs), wide defenders (WDs), central midfielders (CMs), wide midfielders (WMs), and attackers (ATs). Match activities were captured using a validated camera tracking system (InStat®). Results: The findings showed that total distances covered by players during matches consistently decreased by 13% from the first half of the game (112.79±10.17 m) to extra time (103.17±6.39 m). The reduction of the total distance covered, especially in high-intensity running (i.e., high-speed running and sprinting), was more apparent in ATs than players in other positions. Conclusion: Intervention strategies needed to sustain soccer players’ physical performance during extra-time periods and of post-match recovery modalities warrant further investigation.

Sign in / Sign up

Export Citation Format

Share Document