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2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)最新文献

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Improving quality of digital medical images 提高数字医学图像质量
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883604
Vesselin Gueorguiev, I. Ivanov, Borislav Ivanov
{"title":"Improving quality of digital medical images","authors":"Vesselin Gueorguiev, I. Ivanov, Borislav Ivanov","doi":"10.1109/BLJ.2019.8883604","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883604","url":null,"abstract":"Medical images are an important part of the modern diagnostic process of many diseases. The low quality of images is one of the reasons for hypo- or hyper-diagnosis as a result of incorrect deciphering. The proposed paper presents an extended version of our method for image quality enhancement based on the creation of a model of pseudo lighting. The method uses a single digital medical image to create a set of images by simulation different patient exposure conditions. This set of images is used to create our pseudo luminance model. In the final stage, the model is used to create a medical image with enhanced quality without medical artifacts.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129609878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Feasibility Study of the Reflective Properties of Façade Materials for Architectural Lighting Design 建筑照明设计中立面材料反射性能的可行性研究
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883652
Iva Petrinska, Dilyan Ivanov
{"title":"Feasibility Study of the Reflective Properties of Façade Materials for Architectural Lighting Design","authors":"Iva Petrinska, Dilyan Ivanov","doi":"10.1109/BLJ.2019.8883652","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883652","url":null,"abstract":"The paper presents a detailed feasibility study carried out before the design stage of the architectural lighting of the building of the Faculty of Electrical Engineering. The reflectance coefficients of all the surfaces of the building are measured and statistically verified. The bidirectional reflectance distribution functions of three basic surfaces are also measured. The color coordinates of the surfaces are matched to the color coordinates of the light of the flood lights chosen for realization of the lighting concept.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123794010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Energy efficient biodynamic lighting for use in science and education establishments 用于科学和教育机构的节能生物动力照明
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883566
D. Pavlov, D. Ivanov, V. Petrov
{"title":"Energy efficient biodynamic lighting for use in science and education establishments","authors":"D. Pavlov, D. Ivanov, V. Petrov","doi":"10.1109/BLJ.2019.8883566","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883566","url":null,"abstract":"An LED luminaire has been developed for use in science and education establishments. Four of the assembled luminaires were installed in study hall 12541 of Technical University of Sofia. The new lighting installation replaces four luminaire with fluorescent lamps T8 with output power 136W each. The paper describes a comparison of the light and technical performance of both installations. A realistic 3D model of the study hall was created to determine the performance of the new installation and the light reflectance coefficients value of all used surfaces and materials was measured. After physical implementation of the new luminaires, light performance measurements were taken in accordance to standard EN 12464-1 \"Lighting of work places - Part 1: Indoor work places\".","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123800282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Parametric Lighting Design 参数化照明设计
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883626
Asterios Tolidis
{"title":"Parametric Lighting Design","authors":"Asterios Tolidis","doi":"10.1109/BLJ.2019.8883626","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883626","url":null,"abstract":"Lighting a space serves not only purely functional purposes like making objects visible but also purposes which have to do more with impression and aesthetics. In most cases, the procedure of lighting design for achieving certain visual effects is still carried out empirically. Procedures or algorithms that could offer a “reverse engineering” way of lighting design i.e. algorithms that take specific visual objectives as input and give optimum lighting design solutions as output could help a lot the lighting designers to do their job more easily and efficiently.This text includes a literature review of the research on lighting design parameters and how they can be methodically controlled to attain specific visual objectives, and a presentation of a proposal for the parameterization of specific visual effects and linking it with corresponding parameters of lighting design, with the goal of arriving at more automated lighting design techniques.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126878144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An adaptive system for quality improved digitalization of medical images 一种提高医学图像数字化质量的自适应系统
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883649
I. Ivanov, Vesselin Gueorguiev, D. Georgieva
{"title":"An adaptive system for quality improved digitalization of medical images","authors":"I. Ivanov, Vesselin Gueorguiev, D. Georgieva","doi":"10.1109/BLJ.2019.8883649","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883649","url":null,"abstract":"Medical images are an important part of the modern diagnostic process of many diseases. The low quality of images is one of the reasons for hypo- or hyper-diagnosis as a result of incorrect deciphering. One of the image applications is to track changes in patients’ organs and tissues over time. Screen-films and direct exposure films are part of medical image sources. The proposed paper presents a prototype of a new generation of medical image fil digitizer. The characteristics of such an apparatus and the necessary technologies for its implementation are considered.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132323915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ray-tracing based channel modeling for the simulation of the performance of visible light communication in an indoor environment 基于光线追踪的通道建模用于室内环境中可见光通信性能的仿真
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883669
Felix Lichtenegger, C. Leiner, C. Sommer, A. Weiss, F. Wenzl
{"title":"Ray-tracing based channel modeling for the simulation of the performance of visible light communication in an indoor environment","authors":"Felix Lichtenegger, C. Leiner, C. Sommer, A. Weiss, F. Wenzl","doi":"10.1109/BLJ.2019.8883669","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883669","url":null,"abstract":"Ray-tracing based channel modeling is a powerful tool for the determination of the channel characteristics of VLC settings. In order to overcome the huge computational effort that is necessary in this regard, new strategies for less time-consuming ray-tracing based channel models are essential. Here we introduce a channel model that is based on optical simulations using non-sequential ray-tracing in combination with selfdeveloped algorithms in MATLAB. In addition, we discuss an approach, which allows for a time-effective determination of the dependence of the receiver position on the VLC characteristics along the diagonal of the floor of a room. Raytracing information of each ray impinging on a diagonal stripe (with a width of $sim1.41$ cm) is exported to MATLAB for further analysis. By doing so, 26 different receiver positions along the diagonal axis of a room can be investigated using only one raytracing simulation run instead of repeating ray-tracing simulations for each of the 26 receiver positions. The error made by this simulation approach turns out to be negligible because of the small ratio between the area or the receiver stripe and the area of the whole floor.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127213752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Island photovoltaic tunnel lighting systems 岛式光伏隧道照明系统
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883641
S. Petrov, G. Todorov, A. Pachamanov
{"title":"Island photovoltaic tunnel lighting systems","authors":"S. Petrov, G. Todorov, A. Pachamanov","doi":"10.1109/BLJ.2019.8883641","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883641","url":null,"abstract":"Due to the direct correlation between the external illumination in front of the tunnel and the illumination inside the tunnel, road tunnels are possibly the most favorable consumer of electricity produced by photovoltaic (PVS) systems located near their portals. Thus saving the cost of energy supply which are around 30% of its price. The operation of anPVS in an island regime also saves costs for the connection of PVS to the grid of the electricity distribution company. The report takes into account the peculiarities of the operation of the PVSs as an island, justifying the benefit of constructing them as portal shading facilities over the road in front of the tunnel entrance. This reduces the installed power for daylight, respectively the investment for PVS.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126938973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The effect of the continuous energy efficient upgrading of LED street lighting technology: The case study of Egnatia Odos LED路灯照明技术持续节能升级的效果:Egnatia Odos的案例研究
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883662
Evaggelia Anthopoulou, L. Doulos
{"title":"The effect of the continuous energy efficient upgrading of LED street lighting technology: The case study of Egnatia Odos","authors":"Evaggelia Anthopoulou, L. Doulos","doi":"10.1109/BLJ.2019.8883662","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883662","url":null,"abstract":"With the advent of LED technology, lighting studies have gained a great interest, especially street lighting. Nowadays, these studies demonstrate the great energy savings achieved by replacing high pressure sodium lamps with LED. As LED technology is continuously improving, energy savings are increased and thus the payback time of the investment is decreasing more and more. However, there are a lot of cases were the public constructions are delayed and the initial lighting design is getting obsolete, due to the energy efficient upgrade of the LEDs. In this research a newest version (2019) for the lighting design was performed using the latest technology of LED street lighting and compared with the one performed in 2017. Egnatia Odos EO, the largest national road in Greece, was selected as the case study for both studies (2017 and 2019). EO covers a distant of 670 km in northern Greece. Existing lighting infrastructure was designed and installed 17 years before, according to the previous version of EN12301 [1] –[3].","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129415624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Urban lighting in historic settlements: from quality lighting to cultural reinforcement 历史聚落的城市照明:从品质照明到文化强化
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883628
Myrsini Kopanari, Hara Sigala, C. Skandali
{"title":"Urban lighting in historic settlements: from quality lighting to cultural reinforcement","authors":"Myrsini Kopanari, Hara Sigala, C. Skandali","doi":"10.1109/BLJ.2019.8883628","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883628","url":null,"abstract":"The purpose of the study is to define the lighting design techniques and strategies that can be used in small-scale historic urban settlements in order to achieve quality lighting, cultural reinforcement and tourist attraction. By the definition of small-scale settlements this research refers to the historical centers of the city, around which the modern urban environment has been developed. Their role in urban life is analyzed by focusing on the medieval fortification settlements of the Cycladic islands as they constitute a very special case of study with strong architectural and cultural features.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121318779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The LED spectral power distribution modelled by different functions - how spectral matching quality affected computed LED color parameters 不同函数模拟的LED光谱功率分布-光谱匹配质量如何影响计算的LED颜色参数
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883564
Robert Supronowicz, I. Fryc
{"title":"The LED spectral power distribution modelled by different functions - how spectral matching quality affected computed LED color parameters","authors":"Robert Supronowicz, I. Fryc","doi":"10.1109/BLJ.2019.8883564","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883564","url":null,"abstract":"The paper is describing different alternatives for mathematical modelling of LED’s spectral power distribution. Gaussians, logistic power peak and asymmetric double sigmoidal functions are tested with different shape and peak wavelength LEDs. Article shows how SPD accuracy modeling is affecting color quality parameters and luminous efficiency of LED. Consequences of applying always single SPD model for different LED emitters are shown for chosen parameters.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117235969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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