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Determining Ship Position In A Harbour Based On Omnidirectional Image Of The Coastline

. 166K/1, pp. 163–173. [16] Naus K., Jankiewicz M., The Geometry assembling of spatial objects in Electronic Navigational Chart, IV International Scientific and Technical Conference EXPLO-SHIP, Świnoujście — Kopenhaga 2006, pp. 237–246. [17] Naus K., Wąż M., A simplified navigational chart pyramid dedicated to an autonomous navigational system, Polish Hyperbaric Research, 2012, Vol. 40, No. 3, pp. 139–161. [18] Naus K., Electronic Navigational Chart as equivalent omnidirectional image of the hypercatadioptric camera system, Polish Maritime Research

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Electronic Navigational Chart as an Equivalent to Image Produced by Hypercatadioptric Camera System

Abstract

This paper presents a dynamic hyperboloidal mapping model aimed at building image of electronic navigational chart which constitutes an equivalent to that obtained from a hypercatadioptric camera system. In the 1st part, space and three reference frames located in it are defined. These are: the observer frame and horizontal topocentric frame considered secondary (both connected with water-surface platform), and the geocentric frame, primary one. The 2nd part provides description of a way of interconnection between the observer frame and horizontal topocentric one as well as of determination of their location in relation to the geocentric reference frame, depending on course and position of water-surface platform. In the final part is presented a model of panoramic image mapping in the observer reference frame and principles of generating ENC image by using dynamic hyperboloidal mapping. Finally, conclusions indicating possible applications of the developed model are presented.

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Development of a Gait Recognition System in NI LabVIEW Programming Language

Abstract

Nowadays, the biometric identifier’s world is one of the most rapidly developing security technology areas. Within the biometric identification, the research team worked in the area of gait recognition. The research team developed a complex walking recognition system in NI LabVIEW environment that can detect multiple simultaneous reference points using a universal camera and capable of matching a predetermined curve to the collected samples. In the first version, real-time processing was done with a single camera, while in the second, two high-resolution cameras work with post-processing. The program can compare and evaluate the functions that are matched to the reference curve and the current curve in a specific way, whether two walking images are identical. The self-developed gait recognition system was tested on several test subjects by the research team and according to the results, the False Acceptance Rate was zero.

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Design of a Horizontal Anaerobic Reactor

Abstract

Adequate security measures at schools are essential, not only in Vojvodina but in all secondary schools. This work outlines the opinion of secondary school teachers concerning the mechanical and electronic protection of secondary school institutions. The present research aims to shed light on the significance of school security, and problems caused by its lack, as well as to offer suggestions towards increased security and protection.

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Biomechanical Differences in the Sprint Start Between Faster and Slower High-Level Sprinters

development of force in the horizontal/vertical direction (F xy ), vertical direction (F y ) and horizontal anterior-posterior direction (F x ) was recorded ( Figures 2 , 3 ). Measures selected for analysis were as follows: front and rear block total force (N), front and rear block maximal force in both the horizontal and vertical directions (N), time to front and rear block peak force (ms), total force impulse (N⋅s), total horizontal and vertical impulse (N⋅s) and front and rear block force impulse (N⋅s). Start kinematics were assessed by an eight CCD camera system (SMART

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The Reliability of Technical and Tactical Tagging Analysis Conducted by a Semi-Automatic VTS In Soccer

analysis can be affected by several variables such as the observer’s level of experience, the total number of observers and the quality of the observer/s view ( Duthie et al., 2003 ). The Video-Tracking System (VTS) is a semi-automatic technology that significantly increases the accuracy and reliability of performance analysis and technical tagging procedures compared to traditional notational analysis and it is commonly used at the professional level ( Barris and Button, 2008 ). This technology is able to analyse several players simultaneously (via a multiple camera

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Options for Monitoring of Spaces Publicly Inaccessible in the Context of Protection of Personal Data and Personal Rights

Abstract

The submitted article devotes to the protection of personal data, the protection of personal rights in connection to the use of monitoring devices - camera systems. It analyses legal regulation valid and effective up to 25.5.2018, namely the selected parts, which are assessed in view of suitability and sufficient protection of personal data of data subjects. Several of its parts are subject to scrutiny. Subsequently, the attention is given to the legal regulation effective from 25.5.2018, which is a response to the adoption of a Regulation of the European Parliament and of the Council 2016/679 of 27 April 2016 on protection of personal data of natural persons. Even though the original regulation is subjected to a relatively strong criticism, this new regulation does not contain even those guarantees, which are contained by the still effective act. Within this context, the conclusion contains the formulated specific recommendations and proposals to a significantly more effective protection of personal data of data subjects with regard to the used monitoring devices - camera systems.

Open access
The Accuracy and Reliability of a New Optical Player Tracking System for Measuring Displacement of Soccer Players

Abstract

Recently, a novel optical player tracking system has been developed to determine positional information of athletes in a non-invasive manner. The aim of this study was to measure the accuracy and reliability of displacement estimates derived from the system. Participants completed five soccer-specific running courses at three different speeds three times each, while being filmed using the multi-camera system. The participant’s x,y field positions were determined by the optical player tracking system and displacement was estimated using Euclidean distance, and compared with real distance. On average, the difference between actual distance and estimated displacement was 0.25% (mean absolute difference = 0.79 ± 0.56m) with a slightly larger coefficient of variation during 90° turns (4.89%) when compared with straight line running (4.09%). In addition, there were strong correlations between actual distance and measured displacement (r = 0.986 – 0.988). Collectively, the typical error (0.25 – 0.36 m), typical error as a coefficient of variation (1.06 – 1.75%) and intraclass correlation coefficient (0.88 – 0.93) showed high levels of intra-operator reliability. The optical player tracking system provides accurate and reliable estimates of displacement of players on a soccer field. This system provides non-invasive position detections for players and opposition players during soccer matches.

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Universal Autonomous Control and Management System for Multipurpose Unmanned Surface Vessel

Abstract

The paper presents design, structure and architecture of the Universal Autonomous Control and Management System (UACAMS) for multipurpose unmanned surface vessel. The system was designed, installed and implemented on the multipurpose platform - unmanned surface vessel named HydroDron. The platform is designed to execute hydrographic survey missions with multi-variant configuration of the survey system (payload?) including multi-beam echo sounder, sonar, LiDAR, automotive radar, photographic and spectral camera systems. The UACAMS designed to provide flexibility that enables to operate on the different kind of surface platform and different type of functional payload. The full system configuration provides all four level of autonomy starting from remotely controlled to full autonomous mission. Each level can be implemented and run depending on user specific requirements. The paper explains the differences between autonomous and automatic mission and shows how the autonomy is implemented into the presented system. The full hardware structural design as well as the software architecture are described. In order to confirm initial assumptions the applied system was tested during four- week sea trials and tuned for a selected vessel to confirm assumptions. In the project, also the original shore control station was designed, produced and tested for the vessel, including specific user controls and radio communication system. Conclusions sum up all crucial points of the design and system implementation process.

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Acute Effects of Barefoot And Minimalist Footwear on Medial Tibiofemoral Compartment Loading During Running: A Statistical Parametric Mapping Approach

Abstract

The current investigation examined the effects of running barefoot and in minimalist footwear on medial tibiofemoral compartment loading, compared to conventional running trainers. Fifteen male runners ran over a force platform in five different footwear conditions (barefoot, Vibram five-fingers (Footwear A), Inov-8 (Footwear B) Nike-Free (Footwear C), and running trainer) whilst lower extremity kinematics were examined using a three-dimensional camera system. Medial compartment loading during the stance phase was explored using the knee adduction moment (KAM). In addition, the KAM instantaneous load rate was also calculated. Differences between footwear across the entire stance phase were examined using 1-dimensional statistical parametric mapping, whereas differences in discrete parameters were explored using one-way repeated measures ANOVA. Statistical parametric mapping revealed that Footwear B was associated with a significantly larger KAM compared to the running trainer from 15-20 and 25-30% of the stance phase and also Footwear C from 15-20% of the stance phase. The KAM instantaneous load rate was significantly larger in the barefoot (210.69 Nm/kg/s), Footwear A (200.23 Nm/kg/s) and Footwear B (186.03 Nm/kg/s) conditions in comparison to Footwear C (100.88 Nm/kg/s) and running trainers (92.70 Nm/kg/s). The findings from this study indicate that running barefoot and in minimalist footwear with the least midsole interface may place runners at increased risk of medial compartment knee OA, although further exploration using habitual barefoot / minimalist footwear users is required.

Open access