Whiteness is an attribute of colors of high luminous reflectance and low purity situated in a relatively narrow region of the color space. The evaluation of whiteness of a product is dependent from the materials and the application it is used in. The most common acceptable formula for evaluation of white samples is the CIE whiteness index. The performance of the CIE whiteness formula is focused on D65 illuminant and narrow region of color space correl ate not well under other conditions. Whiteness Vik-Vikova WVV whiteness formula was published on CIE Midterm meeting on Jeju Island, Korea 2017 is based on CIECAM02 color appearance model, respectively on its approximately uniform version called as CIECAM02UCS. A visual assessment study of the selected samples was carried out in order to relate the influence of the tint to perceive white. The results show that the new whiteness formula outperform other whiteness formulae in case of samples on the border of CIE Whiteness formula limits.
{"title":"WHITENESS FORMULA BASED ON CIECAM02 AND THEIR TEXTILE APPLICATION","authors":"Michal Vik, M. Viková","doi":"10.25039/X46.2019.PO050","DOIUrl":"https://doi.org/10.25039/X46.2019.PO050","url":null,"abstract":"Whiteness is an attribute of colors of high luminous reflectance and low purity situated in a relatively narrow region of the color space. The evaluation of whiteness of a product is dependent from the materials and the application it is used in. The most common acceptable formula for evaluation of white samples is the CIE whiteness index. The performance of the CIE whiteness formula is focused on D65 illuminant and narrow region of color space correl ate not well under other conditions. Whiteness Vik-Vikova WVV whiteness formula was published on CIE Midterm meeting on Jeju Island, Korea 2017 is based on CIECAM02 color appearance model, respectively on its approximately uniform version called as CIECAM02UCS. A visual assessment study of the selected samples was carried out in order to relate the influence of the tint to perceive white. The results show that the new whiteness formula outperform other whiteness formulae in case of samples on the border of CIE Whiteness formula limits.","PeriodicalId":121032,"journal":{"name":"PROCEEDINGS OF the 29th Quadrennial Session of the CIE","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131195579","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}
A questionnaire was conducted to investigate how 140 architecture students apprise daylight conditions within the classrooms. The participants were requested to evaluate the luminous environment and their luminous comfort. They were also asked about light preferences and knowledge on daylight metrics and regulations. The students’ subjective appraisals results were compared with the experts’ assessment and the on-site illuminance measurements. Later on, the students had to carry out a series of daylight indices simulations summarizing daylight conditions in their private rooms (a user’s experience), and in a room, within a building, they had been designing (a designer’s experience). The perception of the luminous environment was analysed against participants’ comprehension of daylight simulations data. The issues students encountered during the daylight indicators analysis suggested that more coherent daylight education should be offered for future architects.
{"title":"DAYLIGHT WITHIN A ROOM IN THE EYES OF ARCHITECTURE STUDENTS","authors":"N. Sokół, Federica Giuliani, J. Martyniuk-Pęczek","doi":"10.25039/X46.2019.PO127","DOIUrl":"https://doi.org/10.25039/X46.2019.PO127","url":null,"abstract":"A questionnaire was conducted to investigate how 140 architecture students apprise daylight conditions within the classrooms. The participants were requested to evaluate the luminous environment and their luminous comfort. They were also asked about light preferences and knowledge on daylight metrics and regulations. The students’ subjective appraisals results were compared with the experts’ assessment and the on-site illuminance measurements. Later on, the students had to carry out a series of daylight indices simulations summarizing daylight conditions in their private rooms (a user’s experience), and in a room, within a building, they had been designing (a designer’s experience). The perception of the luminous environment was analysed against participants’ comprehension of daylight simulations data. The issues students encountered during the daylight indicators analysis suggested that more coherent daylight education should be offered for future architects.","PeriodicalId":121032,"journal":{"name":"PROCEEDINGS OF the 29th Quadrennial Session of the CIE","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121647831","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}
This paper studies the colorimetric characteristics of daylight within the framework of the CIE Standard General Skies. The correlated colour temperatures (CCTs) were studied based on long-term measurements. The colorimetric analysis employed in this study comprises: (i) the CCT occurrence; (ii) the CCT ranges; (iii) the CCT variation depending on the solar altitude; in function of season, time of day, and orientation, all corresponding to the fifteen CIE Standard Skies. The last part of the analysis illustrates the practical application of the results in the urban structure, represented in spectral daylight potential diagrams. The findings show significant colorimetric discrepancies both between and within the sky types and support the key argument against a fixed CCT for all sky types. The paper helps to understand the spatio-temporal variability of the CCT and indicates what possible effect that variation might have on the colorimetric daylight characteristics on façades, and therefore on the potential of a building regarding the ipRGC influenced responses to light.
{"title":"A DATA-DRIVEN COLORIMETRIC ANALYSIS OF THE CIE STANDARD GENERAL SKIES","authors":"A. Diakite, M. Knoop","doi":"10.25039/X46.2019.OP49","DOIUrl":"https://doi.org/10.25039/X46.2019.OP49","url":null,"abstract":"This paper studies the colorimetric characteristics of daylight within the framework of the CIE Standard General Skies. The correlated colour temperatures (CCTs) were studied based on long-term measurements. The colorimetric analysis employed in this study comprises: (i) the CCT occurrence; (ii) the CCT ranges; (iii) the CCT variation depending on the solar altitude; in function of season, time of day, and orientation, all corresponding to the fifteen CIE Standard Skies. The last part of the analysis illustrates the practical application of the results in the urban structure, represented in spectral daylight potential diagrams. The findings show significant colorimetric discrepancies both between and within the sky types and support the key argument against a fixed CCT for all sky types. The paper helps to understand the spatio-temporal variability of the CCT and indicates what possible effect that variation might have on the colorimetric daylight characteristics on façades, and therefore on the potential of a building regarding the ipRGC influenced responses to light.","PeriodicalId":121032,"journal":{"name":"PROCEEDINGS OF the 29th Quadrennial Session of the CIE","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121882642","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}
Adam Klej, A. Jackson, P. Beeckman, Norbert Mila, K. Banerjee, M. Embrechts, Henk-Jan van Aalderen
{"title":"FLICKER (PSTLM) AND STROBOSCOPIC EFFECT (SVM) - LIGHT MEASUREMENTS IN PHOTOMETRICAL LABORATORIES. SIGNIFY DEVELOPED SETUP AND VALIDATION METHOD","authors":"Adam Klej, A. Jackson, P. Beeckman, Norbert Mila, K. Banerjee, M. Embrechts, Henk-Jan van Aalderen","doi":"10.25039/X46.2019.OP01","DOIUrl":"https://doi.org/10.25039/X46.2019.OP01","url":null,"abstract":"","PeriodicalId":121032,"journal":{"name":"PROCEEDINGS OF the 29th Quadrennial Session of the CIE","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127794901","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}
{"title":"EVALUATION OF HUE SHIFT FORMULAE IN CIELAB AND CAM02","authors":"D. Durmus, Wendy Davis","doi":"10.25039/X46.2019.PO005","DOIUrl":"https://doi.org/10.25039/X46.2019.PO005","url":null,"abstract":"","PeriodicalId":121032,"journal":{"name":"PROCEEDINGS OF the 29th Quadrennial Session of the CIE","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128003896","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}
This paper investigated the influence of light colour quality on emotion and work performance, and find suitable value for colour related office environment. Colour rendering index (CRI) and Gamut Area Index (GAI) were selected to describe the colour quality of the light source in this study. GAI was used to assist Ra to evaluate the relationship of light colour quality with emotion and task performance. Chromatic anfimov alphabet test and Farnsworth Munsell 100 Hue Test were carried out for measuring work performance. To access the emotion of participants, we used PANAS (Positive and Negative Affect Schedule) to investigate the emotional states of subjects in different conditions. The experimental results were analysed by (ANOVA) variance analysis. The results showed that colour matching and discrimination has the best performance in GAI = 100, Ra = 100, the participants are most likely to produce positive emotions in GAI = 120, Ra = 80.
{"title":"EFFECTS OF CRI AND GAI ON EMOTION AND WORK PERFORMANCE IN OFFICE LIGHTING","authors":"D. Hou, Yandan Lin","doi":"10.25039/X46.2019.PO023","DOIUrl":"https://doi.org/10.25039/X46.2019.PO023","url":null,"abstract":"This paper investigated the influence of light colour quality on emotion and work performance, and find suitable value for colour related office environment. Colour rendering index (CRI) and Gamut Area Index (GAI) were selected to describe the colour quality of the light source in this study. GAI was used to assist Ra to evaluate the relationship of light colour quality with emotion and task performance. Chromatic anfimov alphabet test and Farnsworth Munsell 100 Hue Test were carried out for measuring work performance. To access the emotion of participants, we used PANAS (Positive and Negative Affect Schedule) to investigate the emotional states of subjects in different conditions. The experimental results were analysed by (ANOVA) variance analysis. The results showed that colour matching and discrimination has the best performance in GAI = 100, Ra = 100, the participants are most likely to produce positive emotions in GAI = 120, Ra = 80.","PeriodicalId":121032,"journal":{"name":"PROCEEDINGS OF the 29th Quadrennial Session of the CIE","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132646724","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}
Wataru Shichi, T. Toyota, Taka-aki Suzuki, K. Ohkubo
We examined the uniformity of the spatial response distribution function (SRDF) within an integrating sphere in which a baffle with a complex shape had been installed. The SRDF was measured by illuminating an inner surface of an integrating sphere with a spot light and also calculated by numerical simulation. Based on these SRDF results, we established a guiding principle for estimating the uncertainty of the total luminous flux measurement based on the difference in the light distribution between a test light source and a standard light source. Although differences of up to 0,4 % were observed between the total luminous flux obtained in the numerical simulation and that obtained in the experiment, the basic overall tendency of the light distribution dependence was reproduced well in the simulation. This result suggests that it may be possible to apply numerical simulations to determine optimum baffle shapes.
{"title":"EVALUATION OF THE INFLUENCE OF AN INTEGRATING SPHERE INTERNAL STRUCTURE ON TOTAL LUMINOUS FLUX MEASUREMENT","authors":"Wataru Shichi, T. Toyota, Taka-aki Suzuki, K. Ohkubo","doi":"10.25039/X46.2019.PO106","DOIUrl":"https://doi.org/10.25039/X46.2019.PO106","url":null,"abstract":"We examined the uniformity of the spatial response distribution function (SRDF) within an integrating sphere in which a baffle with a complex shape had been installed. The SRDF was measured by illuminating an inner surface of an integrating sphere with a spot light and also calculated by numerical simulation. Based on these SRDF results, we established a guiding principle for estimating the uncertainty of the total luminous flux measurement based on the difference in the light distribution between a test light source and a standard light source. Although differences of up to 0,4 % were observed between the total luminous flux obtained in the numerical simulation and that obtained in the experiment, the basic overall tendency of the light distribution dependence was reproduced well in the simulation. This result suggests that it may be possible to apply numerical simulations to determine optimum baffle shapes.","PeriodicalId":121032,"journal":{"name":"PROCEEDINGS OF the 29th Quadrennial Session of the CIE","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134143589","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}
{"title":"EXPERIMENT OF LIGHTING ENVIRONMENTS IN WARD FOR BLOOD CANCER PATIENTS BASED ON VR TECHNOLOGY","authors":"Shao Rongdi, Feng Kai, Ge Wenjing, Hao Luoxi","doi":"10.25039/X46.2019.OP63","DOIUrl":"https://doi.org/10.25039/X46.2019.OP63","url":null,"abstract":"","PeriodicalId":121032,"journal":{"name":"PROCEEDINGS OF the 29th Quadrennial Session of the CIE","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122183145","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}
Lighting power density (LPD) is one of the most important evaluation index for energy-savings, which has been used as standard in USA, China, Singapore and so on. According to the practice, the standard in China helped reduce LPD by 20 percent, contributing a lot to China's energy-saving goals. The sports lighting is characterized by high-power, much energy consumption and great potential in energy-saving as well. In this study, LPD limits for different sports venues have been determinated according to the requirements of sports lighting, the fundamental of sports lighting design, which is important to the saving of lighting energy consumption. Also the technique of computer simulation, the data accumulation of vast engineering practice, the analysis of key points of lighting energy-saving and the improving method of utilization factor of luminaire are essential in the determination of LPD limits.
{"title":"RESEARCH ON LIGHTING POWER DENSITY AND ENERGY-SAVING TECHNIQUES OFSPORTS LIGHTING","authors":"Jianping Zhao, R. Lin, Y. C. Gao","doi":"10.25039/X46.2019.PO158","DOIUrl":"https://doi.org/10.25039/X46.2019.PO158","url":null,"abstract":"Lighting power density (LPD) is one of the most important evaluation index for energy-savings, which has been used as standard in USA, China, Singapore and so on. According to the practice, the standard in China helped reduce LPD by 20 percent, contributing a lot to China's energy-saving goals. The sports lighting is characterized by high-power, much energy consumption and great potential in energy-saving as well. In this study, LPD limits for different sports venues have been determinated according to the requirements of sports lighting, the fundamental of sports lighting design, which is important to the saving of lighting energy consumption. Also the technique of computer simulation, the data accumulation of vast engineering practice, the analysis of key points of lighting energy-saving and the improving method of utilization factor of luminaire are essential in the determination of LPD limits.","PeriodicalId":121032,"journal":{"name":"PROCEEDINGS OF the 29th Quadrennial Session of the CIE","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125061250","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}
{"title":"DEVELOPMENT OF WHITENESS INDEX FOR FACIAL COLOUR","authors":"Mengmeng Wang, K. Xiao, M. Pointer","doi":"10.25039/X46.2019.PO054","DOIUrl":"https://doi.org/10.25039/X46.2019.PO054","url":null,"abstract":"","PeriodicalId":121032,"journal":{"name":"PROCEEDINGS OF the 29th Quadrennial Session of the CIE","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132316573","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：