Tamas Lovas

Tamas Lovas
Budapest University of Technology and Economics · Department of Photogrammetry and Geoinformatics

PhD

About

57
Publications
19,607
Reads
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429
Citations
Additional affiliations
July 2009 - present
Budapest University of Technology and Economics
Position
  • Professor (Associate)
Education
September 1999 - July 2005
August 1994 - June 1999

Publications

Publications (57)
Article
Full-text available
Limited range of electric vehicles is still a huge barrier compared to conventional vehicles. A well-established charging station network, which is derived from users' charging demand, facilitates the spread of electric vehicles and lessens the range anxiety. Several methods have been developed for locating fast-charging stations along national roa...
Article
Full-text available
There are multiple emerging technologies, devices and integrated equipment to support indoor mapping. The two main categories are the wearable/portable (e.g. hand-held or backpack devices) and the trolley based devices. The most widely used sensors of the integrated systems are the laser scanners (usually profile scanners), camera(s) and the IMU un...
Article
Full-text available
A 3D surface model of an active limestone quarry and a vegetation-covered plateau was created using unmanned aerial vehicle (UAV) technique in combination with terrestrial laser scanning (TLS). The aim of the research was to identify major fault zones that dissect the inaccessible quarry faces and to prepare a model that shows the location of these...
Article
Full-text available
A tisztán elektromos járművek csökkentik a lokális lég-és zajszennyezést, hozzájárulnak a fenntartható közlekedéshez. Térnyerésüket korlátozza a hosszú töltési idő, valamint a töltésükhöz szükséges infrastruktúra hiánya. Utóbbi problémával foglalkozik a cikk; amelyben megtalálható egy a szerzők által kidolgozott multikritériumos módszer, ami két lé...
Article
Since the use of electric vehicles decreases the local pollution and noise emission electromobility gains a huge potential in sustainable transport. The currently insufficient charging network, namely the low number of stations and ill-chosen locations are a significant barrier of the widespread of electric vehicles in many countries. Accordingly,...
Preprint
Full-text available
Since the use of electric vehicles decreases the local pollution and noise emission electromobility gains a huge potential in sustainable transportation. The currently insufficient charging network, namely the low number of stations and ill-chosen locations are a significant barrier of the widespread of electric vehicles in many countries. Accordin...
Article
Full-text available
Az országos átjárhatóságot biztosító elektro-mos villámtöltô-állomások helyszínét kijelölô módszer Az elektromos járművek hátránya a korlátozott hatótávolság, ami különösen a távolsági utazásoknál jelent akadályt. Ez a probléma kiterjedt töltőhálózat létesítésével kezelhető. A multikritériumos, pontorientált töltőtelepítési módszer számos változó a...
Article
Full-text available
Steep, hardly accessible cliffs of rhyolite tuff in NE Hungary are prone to rockfalls, endangering visitors of a castle. Remote sensing techniques were employed to obtain data on terrain morphology and to provide slope geometry for assessing the stability of these rock walls. A RPAS (Remotely Piloted Aircraft System) was used to collect images whic...
Article
Architects ordered the complex building survey of the Royal Castle of Esztergom and generating architectural products like floor plans, cross sections and orthoviews of the walls to support reconstruction works. Due to certain specialities of the castle like extension of the walls (both vertical and horizontal), fragmented and irregular surfaces, d...
Conference Paper
Full-text available
Our aim is to support the work of the Department of Engineering Geology and Geotechnics (BUTE) in the Sárbogárd open field mine by cutting edge data acquisition technics. During the conventional geology examination, we laser scanned and UAV photographed the previously selected and marked rock wall segment. After pre-processing the raw data, the pri...
Article
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Capturing the fine details on the surface of small objects is a real challenge to many conventional surveying methods. Our paper discusses the investigation of several data acquisition technologies, such as arm scanner, structured light scanner, terrestrial laser scanner, object line-scanner, DSLR camera, and mobile phone camera. A palm-sized embos...
Article
Full-text available
Maps are constantly developing, also, the newly defined High Definition (HD) maps increase the map content remarkably. They are based on three-dimensional survey, like laser scanning, and then stored in a fully new structured way to be able to support modern-day vehicles. Beyond the traditional lane based map content, they contain information about...
Article
Full-text available
Point cloud based modeling has become widely used in recent years in the engineering practice. This paper presents several point clouds produced by different software packages using pixel based multi view spatial reconstruction. The purpose of the investigation is to give statistical quality measures beyond the apparent differences between the poin...
Conference Paper
Full-text available
High Definition (HD) maps are newly defined maps with remarkably extended content. These maps are based on 3-dimensional surveys of the environment and are stored in a structured way to fully support today's vehicles. The basic map content focuses not only on the lanes, but also on the road neighborhood. The primary information is therefore the con...
Article
Full-text available
Due to the increased demands of traffic safety applicationsmany parameters of the traffic flow have to be measured bydifferent kind of techniques. The sensors of vehicle sensing anddetection are to be inexpensive, currently available and easy todeploy. Therefore, the state-of-the-art safety applications areusually based on mature technologies, such...
Article
Full-text available
The paper focuses on the 3D data acquisition technologiesthat support capturing the geometry of medieval architecturalfragmented stones. High-resolution models of such fragmentsenable the analysis of profile shapes as well as the markinglines and curves left by the instruments of stonemasons, andtherefore, indirectly, identifying connections betwee...
Article
Full-text available
Low strength rhyolite tuff forms steep cliffs in NE Hungary. A multi-dimensional approach including field analysis and laboratory tests was conducted to understand the mechanical properties of the tuff and to measure discontinuity surfaces. With the help of RPAS (Remotely Piloted Aircraft System) and TLS (Terrestrial Laser Scanning), a digital terr...
Article
Full-text available
Changes in building rules and regulations can broaden the application field of BIM procedures (NBS National Survey, 2016). First, new constructions should by supported by BIM, but the technology can be used effectively in case of some existing buildings, too. Terrestrial laser scanning is a powerful tool to acquire detailed data from existing build...
Article
Autonomous vehicles are considered as the next major milestone in the history of transportation. Current vehicles are widely equipped with satellite-based positioning units and further sensors: cameras, laser scanner, and radar-based sensors. These new technologies are capable of not only detecting other vehicles, pedestrians or road obstacles, but...
Article
Full-text available
Environmental, engineering and industrial modelling of natural features (e.g. trees) and man-made features (e.g. pipelines) requires some form of fitting of geometrical objects such as cylinders, which is commonly undertaken using a least-squares method that—in order to get optimal estimation—assumes normal Gaussian distribution. In the presence of...
Conference Paper
Full-text available
Steep, and hardly accessible jointed rhyolite tuff cliff faces surround a Castle in NE-Hungary, at village of Sirok. The assessment of cliff stability required the recording of cliff geometry. Traditional surveying was not possible therefore cliff faces were 3D modelled by GNSS supported terrestrial laser scanner and UAV. The onsite engineering geo...
Article
Full-text available
Surface reconstruction from point clouds generated by laser scanning technology has become a fundamental task in many fields of geosciences, such as robotics, computer vision, digital photogrammetry, computational geometry, digital building modelling, forest planning and operational activities. Point clouds produced by laser scanning, however, are...
Article
Full-text available
Web-based photo albums that support organizing and viewing the users’ images are widely used. These services provide a convenient solution for storing, editing and sharing images. In many cases, the users attach geotags to the images in order to enable using them e.g. in location based applications on social networks. Our paper discusses a procedu...
Article
Full-text available
Web-based photo albums that support organizing and viewing the users’ images are widely used. These services provide a convenient solution for storing, editing and sharing images. In many cases, the users attach geotags to the images in order to enable using them e.g. in location based applications on social networks. Our paper discusses a proced...
Article
Pedestrian flow is much less regulated and controlled compared to vehicle traffic. Estimating flow parameters would support many safety, security or commercial applications. Current paper discusses a method that enables acquiring information on pedestrian movements without disturbing and changing their motion. Profile laser scanner and depth camera...
Article
Full-text available
Pedestrian flow is much less regulated and controlled compared to vehicle traffic. Estimating flow parameters would support many safety, security or commercial applications. Current paper discusses a method that enables acquiring information on pedestrian movements without disturbing and changing their motion. Profile laser scanner and depth camera...
Conference Paper
Full-text available
Siroki várhegyet alkotó riolittufa állékonysági vizsgálatát mutatja be a cikk, kiemelve a térinformatika és a mérnökgeológia együttes alkalmazását. A sziklalejtő felmérésére az erősen tagolt domborzat miatt és a nehéz megközelíthetőség miatt GNSS támogatású földi lézerszkennelés és drónos légifényképezést alkalmaztunk. Az így kapott térinformatikai...
Article
Full-text available
Traditionally, the least-squares method has been employed as a standard technique for parameter estimation and regression fitting of models to measured points in data sets in many engineering disciplines, geoscience fields as well as in geodesy. If the model errors follow the Gaussian distribution with mean zero in linear models, the least-squares...
Article
Full-text available
Analyzing mobility patterns helps to understand travel behavior of travelers, thus the transportation demands. A comprehensive mobility analysis was performed on a huge dataset from Berlin. This dataset contains answers from 41,000 volunteers, who reported their trips with departure and destination information. A modified graph representation is us...
Article
Full-text available
Mobile communication systems produce gigabytes of mobility information day-today on country level, which could be exploited in various Intelligent Transportation System (ITS) applications. This paper presents the basic concept for tracking users based on handover (HO) zone detections provided by the telecommunication network. This concept is able t...
Article
Full-text available
A new robust parameter estimation method taking into account the real model error distribution is presented for large size of noisy data points. Maximum likelihood technique is employed to compute the model parameters assuming that the distribution of the model errors is a Gaussian mixture corresponding to the inlier and outlier data points. The ma...
Article
Full-text available
Initiatives such as eCall are a necessary step towards improving road safety by assisting individuals to seek help from emergency services. However, there are still a number of unmet needs of stakeholders in the emergency chains and a number of deployment challenges that need to be overcome. In this paper, we present those needs and discuss the key...
Conference Paper
Full-text available
The penetration of GSM capable devices is very high, especially in Europe. To exploit the potential of turning these mobile devices into dynamic data acquisition nodes that provides valuable data for Intelligent Transportation Systems (ITS), position information is needed. The paper describes the basic operation principles of the GSM system and pro...
Article
Full-text available
The penetration of GSM capable devices is very high, especially in Europe. To exploit the potential of turning these mobile devices into dynamic data acquisition nodes that provides valuable data for Intelligent Transportation Systems (ITS), position information is needed. The paper describes the basic operation principles of the GSM system and pro...
Article
Full-text available
Three dimensional terrestrial laser scanning has already proved its potential in several application fields, such as topography, archaeology, mining and cultural heritage protection. Beside these areas a new demand emerged: accurate point cloud acquisition and post-processed results in engineering survey. This technology could broaden the field of...
Article
The paper summarizes the main terms and expressions of terrestrial laser scanning regardless of the laser scanning platform. It also gives short descriptions about the highlighted keywords, to support the understanding of the terminology used in this state-of-the art data acquisition technique. The authors' aim is also to start a professional discu...
Article
Full-text available
Terrestrial laser scanning broadens its application areas in civil engineering, and claims even more attention in engineering survey. The paper shows the results of a laboratory test of a laser scanner. The laboratory test involved complex 3D accuracy analysis, reflectivity investigation of different colors and materials used at construction sites...
Article
In many laser scanning projects the measurement circumstances, accuracy issues are not discussed in detail. The Department of Photogrammetry and Geoinformatics has carried out a comprehensive laboratory investigation in order to specify the measurement parameters of a Riegl LMS Z420i terrestrial laser scanner. The investigation includes accuracy as...
Article
State-of-the-art geodetic and remote sensing techniques can prove their potential through particular engineering applications. Here we discuss load test measurements of bridges over the Danube. Prior to the particular bridge surveying projects, accuracy analysis was carried out in the laboratory. We describe the shortcomings and limitations of remo...
Article
Full-text available
The state-of-the-art geodetic and remote sensing techniques can prove their potential through particular engineering applications. Besides the traditional surveying terrestrial laserscanning broadens its application. field in. civil engineering projects. The Department of Photogrammetry and Geoinformatics has long experience in the measurement meth...
Article
This paper deals with the investigation of laserscanning in load test measurements of the Megyeri bridge. It discusses the procedure of the simultaneous measurement of two scanners and the processing of the laserscanned point cloud. The (graphical and numerical) evaluation of results is extended by recommendations for further application of lasersc...
Conference Paper
This paper describes the preliminary results for detecting slippery road conditions. The detector will be implemented in a larger system intended to increase the safety margin for vehicle drivers, by utilising so-called co-operative driving where infrastructure to vehicle communications operate seamlessly. The ice detection system is based on inten...
Article
Full-text available
This paper introduces a complex, low-cost road pavement measurement system designed primarily for pothole and crack detection. The onboard system is composed of a GPS/INS navigation unit, an image acquisition module, and a photogrammetric and image- processing subsystem. Due to the use of structured light and the availability of accurate navigation...
Article
Full-text available
Terrestrial laserscanning broadens its application area in the civil engineering industry. This paper discusses the potential of the technology through the example of the deformation measurement of a new Hungarian bridge on the Danube during its load testing procedure. The paper discusses the complex procedure from the field measurement through pri...
Article
Full-text available
This paper discusses the continuation of the research work started in 2004. The previous results have been published both in ASPRS and ISPRS conferences. Now we intend to emphasize the latest developments and extended application areas of the system. Due to the increasing demand of the transportation authorities for rapid, accurate data acquisition...
Article
The current paper is the continuation of the research work, of which initial results has already been published at the 2005 ASPRS annual meeting. The system is dedicated to derive certain parameters that enable classifying roads based on their condition. Applying vertically projected laser marker points and stereophotogrammetric method, the digital...
Article
Due to the decreasing prices of the sensors and equipments, mobile mapping technologies are widely used even in the commercial area (e.g. transportation) in the 21st century. The road networks often cannot cope with the increased traffic load; moreover, the roads in bad condition reduce the overall capacity of a network. Pavement condition is a cen...
Article
Due significant advancements of the imaging and positioning sensors, the application area of the mobile mapping systems widely broadened in the last few years. The location data for the optical sensors is provided by GPS. In order to provide coordinates in the gaps when GPS out-age happens and to ensure accurate orientation data for the imaging sen...
Conference Paper
Due to the heavy traffic, people living in urban areas have to get used to congested roads, increased traveling time, and stressful situations. There is a strong demand on acquiring real-time flow data on actual traffic and road conditions. Our paper presents a method on acquiring several traffic data from different data sources, such as induction...
Article
Full-text available
Airborne laser scanning has established itself as a dominant technology providing high quality surface data for a variety of applications. LiDAR has substantially widened the use of mapping, for instance, in the late nineties, telecommunication industry required large volumes of high-density DSM data. In addition, research has recently shown promis...
Article
LIDAR is an emerging remote sensing technology that is capable of rapidly acquiring accurate, spatial data in a relatively inexpensive way. In this paper we focus on the airborne laser scanning, and its applications. If the laser sensor is mounted on an aircraft, the positioning reliability highly depends on the accuracy of the integrated navigatio...
Article
Full-text available
This paper focuses on the potential of using airborne laser scanning technology for transportation applications, especially for identifying moving objects on roads. An adaptive thresholding algorithm is used to segment the LiDAR point cloud, which is followed by a selection process to extract the vehicles. The LiDAR data are capable of measuring th...
Article
Full-text available
The paper presents a low-cost navigation system, which is based on digital terrestrial images. The database of the test area is filled by digital images about road junctions, crossings, and other "irregularities" taken with a high-resolution commercial camera. The developed guidance system solves the usual problem within urban circumstances (one or...
Article
Full-text available
SafeTRIP is an integrated project of the European Union (total research effort: €11.5M) involving 20 partners from many European countries. Its primary goal is to efficiently exploit the S-band communication via W2A satellite to improve road safety and to provide state-of-the-art on-board communication solution for the transport stakeholders. Besid...

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Projects (3)
Project
Collecting research papers to a special issue of Remote Sensing (ISSN 2072-4292). This special issue belongs to the section "Engineering Remote Sensing". Deadline for manuscript submissions: 31 October 2021. Details: https://www.mdpi.com/journal/remotesensing/special_issues/UAV_civil
Project
The Hungarian Government decided to built an Automotive Proving Ground dedicated for the testing and validation of CAVs and electric vehicles. BME and the RECAR consortium are carriing our research projects on 5 layers to support the test track from scientific point of view. Starting with Simulation (1) continuing with Laboratory Testing (2) through the controlled and safe test environment of the Test Track (3) itself going up to Limited Public Road Testing (4) and Open Public Road Testing (5) all layers are covered within the framework of RECAR.
Project
The goal of this project is to use mathematical methods for the solution of multi-variable polynomial equations that are often encountered in geosciences. The project employs both algebraic (“exact”, e.g., Groebner basis and Multiresultant techniques) and numerical (“approximate”, e.g., Homotopy and Extended Newton-Raphson) methods. The project points to the recent combination of algebraic and numerical methods (“hybrid” methods), which is currently one of the most promising directions in the area of computer mathematics and geosciences in general. The reason why this project manages to bring the algebraic and the numerical aspect together is because it is strictly goal-oriented towards the solution of fundamental problems in the areas of geosciences,- e.g. the positioning and point cloud problems - and the solution of application problems does not allow purism in methodology but, rather, has to embrace different approaches with different benefits in different circumstances.