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Proceedings of the Conference CIE 2021最新文献

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HANDLING OF CORRELATIONS OF SPECTRAL QUANTITIES IN TRACEABILITY CHAIN – BASICS FOR A PYTHON-BASED ANALYSIS FRAMEWORKE 可追溯链中光谱量相关性的处理——基于python的分析框架的基础
Proceedings of the Conference CIE 2021 Pub Date : 2021-12-06 DOI: 10.25039/x48.2021.po21
P. Schneider, T. Gerloff, A. Sperling
{"title":"HANDLING OF CORRELATIONS OF SPECTRAL QUANTITIES IN TRACEABILITY CHAIN – BASICS FOR A PYTHON-BASED ANALYSIS FRAMEWORKE","authors":"P. Schneider, T. Gerloff, A. Sperling","doi":"10.25039/x48.2021.po21","DOIUrl":"https://doi.org/10.25039/x48.2021.po21","url":null,"abstract":"In this contribution a framework is presented that aims to help for handling correlations within measurement uncertainty calculations for spectral quantities. Taking correlations for spectral quantities into account is necessary as they directly influence the measurement uncertainties especially for integral quantities. Therefore, determination of correlations within traceability chains at national metrology institutes (NMIs) and disseminations of correlated data to test laboratory level is encouraged and a major goal of the EMPIR project 19NRM02 “Revision and extension of standards for test methods for LED lamps, luminaires and modules” (RevStdLED). The presented python-based analysis framework is used in photometry and spectroradiometry at PTB to calculate the results and associated measurement uncertainty for spectral irradiance, spectral irradiance responsivity and luminous responsivity based on spectral calibrations.","PeriodicalId":363368,"journal":{"name":"Proceedings of the Conference CIE 2021","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126344722","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
HOW TO TAKE INTO ACCOUNT THE HETEROGENEITY OF OPTICAL PROPERTIES OF A PAVEMENT IN LIGHTING DESIGN? 如何在照明设计中考虑路面光学特性的不均匀性?
Proceedings of the Conference CIE 2021 Pub Date : 2021-12-06 DOI: 10.25039/x48.2021.op04
F. Greffier, V. Muzet, V. Boucher
{"title":"HOW TO TAKE INTO ACCOUNT THE HETEROGENEITY OF OPTICAL PROPERTIES OF A PAVEMENT IN LIGHTING DESIGN?","authors":"F. Greffier, V. Muzet, V. Boucher","doi":"10.25039/x48.2021.op04","DOIUrl":"https://doi.org/10.25039/x48.2021.op04","url":null,"abstract":"Optimising lighting installations reduces energy consumption and stray light while providing optimal visibility conditions for road users. However, the origin of the large discrepancies often observed between the design of lighting installations and their actual performance remains poorly explained. For the design stage, it is assumed that the road has homogeneous photometric characteristics. To examine the impact of pavement heterogeneity on these differences, numerous measurements of pavement reflection properties were carried out on an experimental site with a portable device. A homemade software was used to perform several road lighting calculations by integrating the measured r-tables in different ways. New metrics based on lighting performance criteria deviation and pavement reflection properties deviation are used to compare the calculations. The results highlight the importance of measuring the optical properties of pavements and confirm methodological guidelines for making representative on-site measurements.","PeriodicalId":363368,"journal":{"name":"Proceedings of the Conference CIE 2021","volume":"363 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115968860","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
VALIDATION OF SPECTRAL SIMULATION TOOLS FOR THE PREDICTION OF INDOOR ELECTRIC LIGHT EXPOSURE 光谱模拟工具用于室内电光照预测的验证
Proceedings of the Conference CIE 2021 Pub Date : 2021-12-06 DOI: 10.25039/x48.2021.op05
C. Pierson, M. Gkaintatzi-Masouti, M. Aarts, M. Andersen
{"title":"VALIDATION OF SPECTRAL SIMULATION TOOLS FOR THE PREDICTION OF INDOOR ELECTRIC LIGHT EXPOSURE","authors":"C. Pierson, M. Gkaintatzi-Masouti, M. Aarts, M. Andersen","doi":"10.25039/x48.2021.op05","DOIUrl":"https://doi.org/10.25039/x48.2021.op05","url":null,"abstract":"As the interest in design applications related to responses to light beyond vision is growing, two simulation tools, ALFA and Lark, have been developed to incorporate spectral characteristics of light in the evaluation of indoor lighting conditions. The spectral characteristics of light are of particular relevance when studying ipRGC-influenced responses. This paper aims to assess the reliability of these tools in predicting indoor spectral irradiance specifically from electric lighting. Spectral irradiance was measured under three indoor electric lighting scenarios and compared against spectral irradiance simulated in ALFA and Lark. While the outcomes of the study tend to show that ALFA is both more accurate and faster, rather large errors were found for spectral irradiance (-28.6% to 33.4%). In comparison to a prior study focusing on daylighting, these results seem to indicate that spectral simulations of electrically lit scenes are generally less accurate than those of daylit scenes with these tools.","PeriodicalId":363368,"journal":{"name":"Proceedings of the Conference CIE 2021","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122765679","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
EVALUATION OF IMPEDANCE OF CABLES IN GONIOPHOTOMETRY 斜视测量中电缆阻抗的评定
Proceedings of the Conference CIE 2021 Pub Date : 2021-12-06 DOI: 10.25039/x48.2021.po15
Pan Jiangen, Li Qian, Li Xiaoni
{"title":"EVALUATION OF IMPEDANCE OF CABLES IN GONIOPHOTOMETRY","authors":"Pan Jiangen, Li Qian, Li Xiaoni","doi":"10.25039/x48.2021.po15","DOIUrl":"https://doi.org/10.25039/x48.2021.po15","url":null,"abstract":"In a goniophotometer system, it is often unavoidable to use long cables to connect power supply, electrical measuring instrument, and the device under test (DUT). The measurement errors caused by cable impedance should not be ignored. An equivalent electrical circuit model considering the cable impedance of a typical goniophotometer is established in this paper. The measurement errors caused by the cable impedance are analysed by simulation. In DC and low frequency circuits, the cable impedance is almost resistive, while the inductive impedance of cables is significant and may lead to considerable errors when frequency is above 1 kHz in the circuits. Cable solutions in goniophotometry are introduced and recommended.","PeriodicalId":363368,"journal":{"name":"Proceedings of the Conference CIE 2021","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125617890","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
THE DIFFUSENESS OF ILLUMINATION SUITABLE FOR REPRODUCING OBJECT SURFACE APPEARANCE USING COMPUTER GRAPHICS 适用于用计算机图形再现物体表面外观的照明的漫射度
Proceedings of the Conference CIE 2021 Pub Date : 2021-12-06 DOI: 10.25039/x48.2021.op57
S. Mizushima, H. Kudo, Y. Dobashi, Y. Mizokami
{"title":"THE DIFFUSENESS OF ILLUMINATION SUITABLE FOR REPRODUCING OBJECT SURFACE APPEARANCE USING COMPUTER GRAPHICS","authors":"S. Mizushima, H. Kudo, Y. Dobashi, Y. Mizokami","doi":"10.25039/x48.2021.op57","DOIUrl":"https://doi.org/10.25039/x48.2021.op57","url":null,"abstract":"The appearance of an object depends on its material, shape, and lighting. In particular, the diffuseness of the illumination has a significant effect on the appearance of material and surface texture. We investigated a diffuseness condition suitable for reproducing surface appearance using computer graphics. First, observers memorized the appearance and impression of objects by viewing pre-observation images rendered using various environment maps. Then they evaluated the appearance of the objects in test images rendered under different levels of diffuseness. As a result, moderate diffuseness conditions received a higher evaluation than low diffuseness conditions. This means that low or very high diffuseness unfamiliar in daily life is unsuitable for reproducing a faithful and ideal surface appearance. However, a particular material is difficult to memorize and evaluate its appearance. The results suggest that it is possible to define a diffuseness that adequately reproduces the appearance of an object using computer graphics.","PeriodicalId":363368,"journal":{"name":"Proceedings of the Conference CIE 2021","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121905409","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
MEASURES FOR REDUCING THE ADVERSE EFFECTS OF ARTIFICIAL LIGHT AT NIGHT: INTER-DISCIPLINARY DEVELOPMENT AND PROGRESS 减少夜间人造光不利影响的措施:跨学科的发展和进步
Proceedings of the Conference CIE 2021 Pub Date : 2021-12-06 DOI: 10.25039/x48.2021.ip03
A. Jägerbrand, C. Bouroussis
{"title":"MEASURES FOR REDUCING THE ADVERSE EFFECTS OF ARTIFICIAL LIGHT AT NIGHT: INTER-DISCIPLINARY DEVELOPMENT AND PROGRESS","authors":"A. Jägerbrand, C. Bouroussis","doi":"10.25039/x48.2021.ip03","DOIUrl":"https://doi.org/10.25039/x48.2021.ip03","url":null,"abstract":"The use of artificial light at night in the outdoor environment may introduce negative and unwanted side-effects such as light pollution and unwanted impacts on humans, ecosystems and biodiversity. Therefore, appropriate measures for reducing the adverse effects of artificial light at night are important to establish a sustainable use of outdoor lighting. This paper presents an updated overview and a state-of-the-art of available and effective measures for reducing artificial light at night, which range from strategical and high-level recommendations to more practical and applicable lighting design recommendations and principles. Another aim is to identify prioritized future research questions and areas that will enhance progress within the area. We present the current recommendations into three groups: (I) recommendations for legislation at the national or international levels, (II) recommendations for technical and practical adaptations of the lighting design and (III) recommendations for sensitive species, taxa, areas or ecosystems.","PeriodicalId":363368,"journal":{"name":"Proceedings of the Conference CIE 2021","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127793609","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
INVESTIGATING LIGHT AND CRIME USING AMBIENT LIGHT LEVEL 利用环境光照水平调查光线和犯罪
Proceedings of the Conference CIE 2021 Pub Date : 2021-12-06 DOI: 10.25039/x48.2021.op31
S. Fotios, C. Robbins, S. Farrall
{"title":"INVESTIGATING LIGHT AND CRIME USING AMBIENT LIGHT LEVEL","authors":"S. Fotios, C. Robbins, S. Farrall","doi":"10.25039/x48.2021.op31","DOIUrl":"https://doi.org/10.25039/x48.2021.op31","url":null,"abstract":"A recent study investigated the influence of lighting on crime by considering the effect of change in ambient light level on crimes recorded in three US cities for the ten-year period 2010 to 2019. The results suggested a significant increase in robbery after dark, but did not suggest significant change in for any other type of crime. The current study was conducted to validate this by considering crimes recorded in three different US cities. This analysis confirmed the statistically significant increase in robbery after dark. These data do not suggest that change in ambient light level has a practically relevant effect on overall crime counts: in other words, the potential benefit of lighting for crime reduction is limited.","PeriodicalId":363368,"journal":{"name":"Proceedings of the Conference CIE 2021","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127986064","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
OPTIMIZING CAMERA PLACEMENT FOR A LUMINANCE-BASED SHADING CONTROL SYSTEM 为基于亮度的阴影控制系统优化摄像机位置
Proceedings of the Conference CIE 2021 Pub Date : 2021-12-06 DOI: 10.25039/x48.2021.po39
A. Mentens, G. Scheir, Y. Ghysel, F. Descamps, J. Lataire, V. Jacobs
{"title":"OPTIMIZING CAMERA PLACEMENT FOR A LUMINANCE-BASED SHADING CONTROL SYSTEM","authors":"A. Mentens, G. Scheir, Y. Ghysel, F. Descamps, J. Lataire, V. Jacobs","doi":"10.25039/x48.2021.po39","DOIUrl":"https://doi.org/10.25039/x48.2021.po39","url":null,"abstract":"Shading control strategies are nowadays employed in office environments to improve the visual comfort of the user. These strategies are often solely illuminance-based whereas comfort metrics as the Daylight Glare Probability (DGP) also need luminance values. In previous studies, daylight glare has been assessed by calculating the DGP from luminance maps obtained via a luminance camera or from a High Dynamic Range (HDR) image obtained with a commercially available camera. These detectors are traditionally mounted close to the user and aligned with the viewing direction. In real office environments, this camera position is impractical, and simulations based on machine learning techniques have shown a relation between the DGP from an observer's viewpoint and the DGP calculated from a ceiling camera. This paper experimentally validates this method in a real office environment by using two different cameras and two different illuminance sensors, i.e., a low-cost illuminance sensor and a calibrated sensor. Both cameras render similar results, although one camera overestimates the DGP. Moreover, the shortcomings of the simulation results are pinpointed and the obstacles for a realistic application are addressed. Furthermore, it was found that when moving the cameras to different positions, the sun position was shown to be an informative additional input for correlating the two DGP values. In future work, additional data will be analysed to determine the performance in other weather conditions and window orientations.","PeriodicalId":363368,"journal":{"name":"Proceedings of the Conference CIE 2021","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128207403","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
SUBJECTIVE EVALUATION OF VISUAL COMPLEXITY, CLARITY, AND PREFERENCE OF INDOOR ENVIRONMENTS 对室内环境的视觉复杂性、清晰度和偏好的主观评价
Proceedings of the Conference CIE 2021 Pub Date : 2021-12-06 DOI: 10.25039/x48.2021.po13
Yu Wang, D. Durmus
{"title":"SUBJECTIVE EVALUATION OF VISUAL COMPLEXITY, CLARITY, AND PREFERENCE OF INDOOR ENVIRONMENTS","authors":"Yu Wang, D. Durmus","doi":"10.25039/x48.2021.po13","DOIUrl":"https://doi.org/10.25039/x48.2021.po13","url":null,"abstract":"Visual comfort, task performance, and observers’ satisfaction is affected by the dynamic nature of visual perception and cognition. The perceived quality of the visual environment can be investigated in terms of visual complexity, visual clarity, and visual preference. This paper investigates the relationship between visual preference, visual clarity, visual complexity, colourfulness and the effect of spatial characteristics of images on the perceived quality of indoor environments. A visual experiment is conducted to assess the accuracy of image quality metrics in estimating the visual complexity, visual clarity, visual preference, and colourfulness of 50 images of indoor environments. Seven image quality assessment measures were used to estimate observers’ subjective evaluations. Results indicate that image colourfulness metric M correlates statistically significantly with visual preference and perception of colourfulness. Visual complexity correlated with five of the metrics. Future research will investigate wide range on images, including human-made and outdoor scenes.","PeriodicalId":363368,"journal":{"name":"Proceedings of the Conference CIE 2021","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134329360","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
SPECTRAL TRANSMISSION AND SCATTERING CHARACTERISTICS OF HUMAN SKIN 人体皮肤的光谱传输和散射特性
Proceedings of the Conference CIE 2021 Pub Date : 2021-12-06 DOI: 10.25039/x48.2021.po08
Y. Akizuki, M. Osumi
{"title":"SPECTRAL TRANSMISSION AND SCATTERING CHARACTERISTICS OF HUMAN SKIN","authors":"Y. Akizuki, M. Osumi","doi":"10.25039/x48.2021.po08","DOIUrl":"https://doi.org/10.25039/x48.2021.po08","url":null,"abstract":"It is necessary for making the real appearance of human skin sample to deal with not only the spectral reflectance characteristics but also the multi-layer structure and translucency. This paper reported the measurement and analysis of the spectral transmitted and scattering light characteristics. For five subjects, the maximum of transmitted light intensity was resulted at 700 nm near the light source, and decreased with decreasing wavelength. Longer the wavelength, longer the distance which the transmitted light intensity was downing to zero. we defined the average attenuation ratio per unit transmitted light intensity which had the calculation range from 3.5 mm from the light source to the distance that the variation ratio of the transmitted light intensity per unit distance was converged to zero. All subjects’ results showed the peak of the average attenuation ratio at 700 nm and the value were almost 0.5. And they decreased with decreasing wavelength.","PeriodicalId":363368,"journal":{"name":"Proceedings of the Conference CIE 2021","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122431370","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
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