Relevant bibliographies by topics / Veiling luminance

Academic literature on the topic 'Veiling luminance'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Veiling luminance"

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Maksimainen, M., M. Puolakka, E. Tetri, and L. Halonen. "Veiling luminance and visual adaptation field in mesopic photometry." Lighting Research & Technology 49, no. 6 (March 22, 2016): 743–62. http://dx.doi.org/10.1177/1477153516637400.

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In mesopic photometry, adaptation luminance is needed to derive the mesopic luminances for the measurement field. The average luminance of the visual adaptation field is considered as the adaptation luminance. The visual adaptation field has yet to be defined in terms of the size, shape, or location within the visual field. A study in three road lighting situations was conducted, in order to determine the feasibility of using the road surface as the adaptation field compared to circular or elliptical adaptation fields. Currently, the road surface is used as the measurement field for calculating road lighting. Using the road surface as the adaptation field resulted in 76–113%, higher average luminance than obtained using circular or elliptical adaptation fields when the road was bordered by a park. High-luminance sources outside of the visual adaptation field cause veiling luminance. Veiling luminance increases the adaptation state, but not the luminance within the measurement field. The bias veiling luminance can cause on mesopic luminance calculations was estimated to be less than 2%. The estimated bias can be considered trivial in practical road lighting measurements.
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Gilchrist, Alan, and Michael S. Langer. "Perception of a Black Room Seen Through a Veiling Luminance." i-Perception 11, no. 6 (November 2020): 204166952097369. http://dx.doi.org/10.1177/2041669520973698.

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When a black room (a room painted black and filled with objects painted black) is viewed through a veiling luminance, how does it appear? Prior work on black rooms and white rooms suggests the room will appear white because mutual illumination in the high-reflectance white room lowers image contrast, and the veil also lowers image contrast. Other work reporting high lightness constancy for three-dimensional scenes viewed through a veil suggests the veil will not make the room appear lighter. Because mutual illumination also modifies the pattern of luminance gradients across the room while the veil does not, we were able to tease apart local luminance gradients from overall luminance contrast by presenting observers with a black room viewed through a veiling luminance. The room appeared white, and no veil was perceived. This suggests that lightness judgments in a room of one reflectance depend on overall luminance contrast only.
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Ivory, S., and A. Gilchrist. "Black rooms seen through a veiling luminance: gradient amplitude vs highest luminance." Journal of Vision 12, no. 9 (August 10, 2012): 1218. http://dx.doi.org/10.1167/12.9.1218.

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Löfving, Björn, Monica Billger, and Jörgen Thaung. "Visualization of Disability Glare Due to Veiling Luminance." Energy Procedia 78 (November 2015): 735–40. http://dx.doi.org/10.1016/j.egypro.2015.11.084.

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Sahana, Sangita, and Biswanath Roy. "Effect Of Chromaticity Of Surrounding Light Sources on Mesopic Adaptation Luminance." Light & Engineering, no. 01-2021 (February 2021): 30–38. http://dx.doi.org/10.33383/2020-012.

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This paper presents variations in mesopic adaptation luminance in the presence of ambient light sources along with main light source for outdoor lighting applications. Mesopic photometry system is based on peripheral task, and adaptation luminance is required to compute the effective mesopic radiance for the measured area. Different lighting conditions were considered to determine the effect of chromaticity of bright surrounding sources other than the main light sources to the state of observer adaptation. The veiling luminance caused by the surrounding sources increases the state of observer adaptation, but not the luminance within the measurement field. It has also been observed that in case of cool white surrounding sources, adaptation luminance increases significantly than that of warm white sources.
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Takeuchi, Tetsuji, and Kohei Narisada. "Additity of the Luminance Difference Thresholds for the Foveal Adaptation Luminance and for the Veiling Luminance." JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 80, no. 8 (1996): 527–31. http://dx.doi.org/10.2150/jieij1980.80.8_527.

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Guliev, Alexander E. "Improvement of Majolica Lighting at the Komsomolskaya – Radial Metro Station." Volume 28, Number 2, 2020, no. 02-2020 (April 2020): 47–53. http://dx.doi.org/10.33383/2018-059.

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The article describes solving of one of the most important problems of perception of architectural decoration of metro stations: removal of veiling reflections on glazed mosaics and majolica caused by lighting devices. A number of lighting methods reducing luminance of the veiling reflections is analysed. Their efficiency is exemplified by lighting of the Mine Laying majolica (based on sketches by Eugene Lancer) at the Komsomolskaya station of Moscow Metro. The content of the article relates not only to metro stations but to any areas with reflective or glazed surfaces.
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Satoh, Ryuji. "Relationship between clarity of chromatic task covered with veiling refrection and luminance of veiling reflection." JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 78, Appendix (1994): 242–43. http://dx.doi.org/10.2150/jieij1980.78.appendix_242.

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Gilchrist, Alan, and Cristhian Altamirano. "Presence of a veiling luminance revealed by higher order variables involving luminance, saturation, and contrast." Journal of Vision 16, no. 12 (September 1, 2016): 816. http://dx.doi.org/10.1167/16.12.816.

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Gilchrist, A., and S. Ivory. "Lightness of a black room seen through a veiling luminance." Journal of Vision 11, no. 11 (September 23, 2011): 374. http://dx.doi.org/10.1167/11.11.374.

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Dissertations / Theses on the topic "Veiling luminance"

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Moura, Norberto Corrêa da Silva. "Segurança, eficiência energética e conforto visual em emboques de túneis rodoviários: soluções arquitetônicas." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/16/16132/tde-19052010-092346/.

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Para atenuar o impacto visual, que acomete o motorista ao ingressar em túneis rodoviários durante o período diurno, utiliza-se a luz artificial, com alto nível inicial e gradual diminuição para o interior do túnel. Tal solução apresenta dois inconvenientes imediatos, relacionados ao consumo de energia e à segurança. Devido à radiação solar direta, as imediações da entrada do túnel tornam-se fontes de ofuscamento de elevada intensidade e a iluminação deve estar dimensionada para permitir, ao motorista que se aproxima da entrada do túnel, a visualização de seu interior, implicando em elevado consumo de energia para uma tarefa com pouco requisito visual. Quanto à segurança, na hipótese de falta de energia aumenta-se a probabilidade de acidentes, pois o reflexo do motorista pode ser frear. As soluções arquitetônicas, objeto da pesquisa, correspondem a um Sistema para Adaptação Visual (SAV), implantado no trecho de rodovia aberta anterior à entrada do túnel, que, por um lado, atua nos elementos causadores do problema e, por outro, fornece a iluminação necessária no interior do túnel através das fontes de luz natural (Sol e céu). Para sua concepção, são propostas cinco estratégias. O desempenho do SAV, assim constituído, foi testado em uma aplicação prática nos túneis do trecho Oeste do Rodoanel Mário Covas, sem apresentar os inconvenientes identificados na solução convencional (iluminação artificial). A segurança no ponto crítico ficou garantida por característica intrínseca do sistema. Além de reduzir o consumo, a energia para o período noturno pôde ser gerada pelo próprio SAV, se incorporados módulos fotovoltaicos, e a sazonalidade característica da luz natural é acompanhada pelo sistema, favorecendo o conforto visual por diminuir a faixa em que ocorre o processo de adaptação visual.
The usual adopted solution to defuse the drivers visual impact at the highway tunnel entrance during the daytime, has been the use of electric lighting, with high initial level and gradual reduction towards the internal side of the tunnel. This brings two immediate problems, concerning energy consumption and security. Direct sunlight causes high intensity glare sources around the tunnel entrance, and the lighting level should be enough to allow the interior visibility, when the driver approaches the tunnel, entailing high energy consumption to a low accurate task. Security-wise, in case of power supply failure, collisions possibility increases, due to the drivers instinctive reaction to brake suddenly. Architectural solutions, this research object, are related to a Visual Adaptation System (VAS) positioned on the open road before the tunnel entrance, which, on the one hand, acts into the problem causes, and, on the other, provides the necessary lighting inside the tunnel by natural light sources (Sun and sky). Five strategies are proposed designing the VAS. A practical application on Metropolitan Area Ring Road Mario Covas West segment tunnels checked the so-built VAS performance, not presenting the identified deficiencies in the conventional solution (artificial lighting). The intrinsic system feature assured the critical point security. Besides the consumption reduction, the energy supply for nighttime could be generated by the VAS, if photovoltaic modules are added, and the natural light seasonal feature is followed by the system, favoring the visual comfort by decreasing the visual adaptation process range.
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Conference papers on the topic "Veiling luminance"

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Rossi, Giuseppe, and Paola Iacomussi. "THE VEILING LUMINANCE IN TUNNEL LIGHTING INSTALLATION." In Proceedings of the 29th Quadrennial Session of the CIE. International Commission on Illumination, CIE, 2019. http://dx.doi.org/10.25039/x46.2019.pp28.

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Wells, Willard H. "Indirect illumination to reduce veiling luminance in seawater." In San Diego, '91, San Diego, CA, edited by Richard W. Spinrad. SPIE, 1991. http://dx.doi.org/10.1117/12.49254.

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Grana, Constantino, Daniele Borghesani, Paolo Santinelli, and Rita Cucchiara. "Veiling Luminance estimation on FPGA-based embedded smart camera." In 2012 IEEE Intelligent Vehicles Symposium (IV). IEEE, 2012. http://dx.doi.org/10.1109/ivs.2012.6232154.

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Cattini, Stefano, Costantino Grana, Rita Cucchiara, and Luigi Rovati. "A low-cost system and calibration method for veiling luminance measurement." In 2011 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). IEEE, 2011. http://dx.doi.org/10.1109/imtc.2011.5944133.

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Choi, Mina, Luigi Albani, and Aldo Badano. "An image-dependent model of veiling glare effects on detection performance in large-luminance-range displays." In SPIE Medical Imaging, edited by Craig K. Abbey and Claudia R. Mello-Thoms. SPIE, 2012. http://dx.doi.org/10.1117/12.913649.

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Reports on the topic "Veiling luminance"

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Nafakh, Abdullah Jalal, Franklin Vargas Davila, Yunchang Zhang, Jon D. Fricker, and Dulcy M. Abraham. Workzone Lighting and Glare on Nighttime Construction and Maintenance Activities. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317379.

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Over the last two decades, an increasing number of highway construction and maintenance projects in the United States have been completed at night to avoid or alleviate traffic congestion delays. Working at night entails several advantages, including lower traffic volumes, less impact on local businesses, cooler temperatures for equipment and material, and fewer overall crashes. Although nighttime roadway operations may minimize traffic disruptions, there are several safety concerns about passing motorists and workers in the nighttime work zone. For instance, improper lighting arrangements or excessive lighting levels at the job site could cause harmful levels of glare for the traveling public and workers, which can lead to an increased level of hazards and crashes in the vicinity of the work zone. To address the issue of glare, the current report focuses on determining and evaluating disability glare on nighttime work zones in order to develop appropriate strategies for improving the safety of workers and motorists during nighttime highway construction and maintenance projects. Disability glare is the glare that impairs our vision of objects without necessarily causing discomfort, and it can be evaluated using the veiling luminance ratio (VL ratio). In this study, disability glare values were determined by using lighting data (vertical illuminance and pavement luminance measurements) from the testing of 49 lighting arrangements. Two LED balloon lights, a metal-halide light tower, and an LED light tower were utilized for the field lighting experiments. The glare assessment analyzed the effects of the lighting system setup’s parameters, such as the mounting height, power output, rotation angle, and aiming angle of luminaires on the veiling luminance ratio values (which is a criterion for limiting disability glare). The study revealed the following key findings: (1) an increase in mounting heights of both balloon lights and light towers resulted in lower disability glare levels; (2) compared to the "perpendicular" and "away" orientations, orienting the light towers "towards" the traffic (45 degrees) significantly increases the disability glare levels of the lighting arrangement; and (3) increasing the tilt angles of portable light tower luminaries resulted in an increase in disability glare levels.
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