Статті в журналах з теми "Veiling luminance"

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1

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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Анотація:
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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

KOHKO, Shunsuke, Kohji KAWAKAMI, and Yoshiki NAKAMURA. "A Study on Affects of Veiling Luminance on Pedestrian Visibility." Journal of Light & Visual Environment 32, no. 3 (2008): 315–21. http://dx.doi.org/10.2150/jlve.32.315.

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12

Sanders, Philip A., and Craig A. Bernecker. "Uniform Veiling Luminance and Display Polarity Affect VDU User Performance." Journal of the Illuminating Engineering Society 19, no. 2 (July 1990): 113–23. http://dx.doi.org/10.1080/00994480.1990.10747971.

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13

Budak, Vladimir P., Viсtor S. Zheltov, Tatyana V. Meshkova, and Victor D. Chembaev. "Experimental Study of the New Criterion of Lighting Quality Based on Analysis of Luminance Distribution at Moscow Metro Stations." Light & Engineering, no. 03-2020 (June 2020): 98–105. http://dx.doi.org/10.33383/2019-044.

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The article presents the experiment in studying a new criterion of lighting quality based on spatial and angular distribution of luminance proposed by the Lighting Engineering sub-department of NIU MPEI. The experiment studies correlation between expert evaluations of lighting quality at 21 stations of the Moscow Metro with analysis based on the criterion of quality of RAW-format luminance photographs of the stations made by means of a camera and adjusted according to luminance measured by a luminance meter. The obtained photos were processed using the proposed criterion. The article presents design of station models and calculations made by means of DIALux software and the programme developed (as part of the work) on the basis of local evaluations. It is demonstrated that the proposed criterion allows us to take account of extended veiling reflections and may be considered as enhancement of the unified glare rating UGR.
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14

Irikura, Takashi, Tetsuo Taniguchi, and Yoshiro Aoki. "Equivalent Veiling Luminance and Small Glare-Source near the Line of Vision." JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 78, no. 2 (1994): 45–50. http://dx.doi.org/10.2150/jieij1980.78.2_45.

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15

Terai, Norifumi, Kazushi Iwamoto, and Yukio Akashi. "Veiling Luminance Caused by a Peripheral Glare Source on Extra-Foveal Vision." Journal of Science and Technology in Lighting 41 (2018): 195–202. http://dx.doi.org/10.2150/jstl.ieij170000605.

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16

Issolio, Luis A., Pablo A. Barrionuevo, Silvia A. Comastri, and Elisa M. Colombo. "Veiling luminance as a descriptor of brightness reduction caused by transient glare." Journal of the Optical Society of America A 29, no. 10 (September 26, 2012): 2230. http://dx.doi.org/10.1364/josaa.29.002230.

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17

Kodaira, Yasuhiro, Junichi Hozumi, Masahiko Wakai, and Masaru Yaegashi. "Measuring the transmittivity of soot and smoke from veiling luminance in a tunnel." JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 83, Appendix (1999): 232. http://dx.doi.org/10.2150/jieij1980.83.appendix_232.

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18

IRIKURA, Takashi, Tetsuo TANIGUCHI, and Yoshiro AOKI. "Equivalent Veiling Luminance Caused by Small Glare Light Source near the Visual Line." Journal of Light & Visual Environment 19, no. 1 (1995): 22–27. http://dx.doi.org/10.2150/jlve.19.1_22.

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19

Jiang, C.-J., C.-C. Sun, Y.-C. Chen, T.-H. Yang, and N. Chang. "The correlation of veiling luminance and unified glare rating with a transfer function." Lighting Research & Technology 46, no. 5 (July 2013): 587–92. http://dx.doi.org/10.1177/1477153513493799.

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20

Choi, Mina, Joel Wang, Luigi Albani, and Aldo Badano. "60.2: Minimizing Veiling Glare in the High-Luminance-Range Visualization of Medical Images." SID Symposium Digest of Technical Papers 43, no. 1 (June 2012): 816–19. http://dx.doi.org/10.1002/j.2168-0159.2012.tb05910.x.

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21

Park, Jae-Min, Sang-Do Lee, and Young-Sook Kim. "An Ergonomic Evaluation of the Effects of Veiling Reflection on the Human Visibility." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 44, no. 21 (July 2000): 3–501. http://dx.doi.org/10.1177/154193120004402139.

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Анотація:
Man perceive and react around him through the five senses. Also man give rise to the human sensibility and maintain his emotion. This study doesn't limit working environment to VDT environment, but considers the universal working environment acquiring information by eyesight stimulation. In this respect, designed and made is experimental equipment such as an external light for veiling reflection, visual target suggesting system, and visual target considered luminance contrast level. And reading the visual target is selected as work after excerpting the editorials from daily newspapers in Korean and Chinese letter and making target for experimental condition. In case of forming an abnormal veiling reflection we consider the form; a vertical (25%, 50%, 75%)and a horizontal (25%, 50%, 75%). The results from the subjective evaluation are analyzed by SD (Semantic Differential) methodology of 5 point scale for visibility and nuisance when an abnormal veiling reflection forms on target. In addition, the results of the objective evaluation are suggested by measuring and analyzing EEG (Electroencephalogram) of bio-signal for visual sensitivity. The results of this study can apply to basic data which create a guideline of a visual operation. In particular, it can be designed as an illumination environment concerning an ergonomic factor on visual operations, mental stress such as a visual inspection operation, visual information search operation, etc. As a result, we can expect to reduce the visual nuisance and contribute to the improvement of the performance and the uplift of the competitive power.
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22

Blick, Dennis W., Jeremy M. A. Beer, William D. Kosnik, Steven Troxel, Alexander Toet, Jan Walraven, and Wallace Mitchell. "Laser glare in the cockpit: psychophysical estimates versus model predictions of veiling luminance distribution." Applied Optics 40, no. 10 (April 1, 2001): 1715. http://dx.doi.org/10.1364/ao.40.001715.

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23

Aguirre, R. C., J. F. Barraza, and E. M. Colombo. "Adding a veiling luminance is not sufficient to explain the effects of glare on simple reaction times." Journal of Vision 6, no. 6 (March 24, 2010): 719. http://dx.doi.org/10.1167/6.6.719.

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24

Iwata, Michico, and Shigemi Uchida. "Experiment to Evaluate Visibility of Street Luminaire with Different Upward Light Output Ratios and Use of Calculated Veiling Luminance to Determine Contrast Performance." JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 92, no. 8A (2008): 455–63. http://dx.doi.org/10.2150/jieij.92.455.

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25

Rushton, William A. H., and Donald I. A. MacLeod. "The Equivalent Background of Bleaching." Perception 15, no. 6 (December 1986): 689–703. http://dx.doi.org/10.1068/p150689.

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Stiles and Crawford proposed that a retinal region bleached by preexposure to intense light behaves as if it were illuminated by some steady veiling or background luminance. We test this notion by comparing the afterimage of a bleaching light with a steady (and retinally stabilized) light of adjustable intensity, in the manner of Barlow and Sparrock. With their matching procedure, and also with a new procedure, we find as they did that during the rod phase of recovery the afterimage does look like a stabilized field of an intensity which, presented as a background, brings visual sensitivity to the same level. It is as if the two conditions produce equal signals at some stage of the visual pathway. Liked Barlow and Sparrock we observe a rod-cone break in the afterimage matches. However, we argue that the appearance of the rod—cone break presents a paradox and we show a way to resolve it.
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26

IWATA, Michico, and Shigemi UCHIDA. "Experiment to Evaluate Visibility with Street Luminaires with Different Upward Light Output Ratios and the Use of Calculated Veiling Luminance to Determine Contrast Performance." Journal of Light & Visual Environment 35, no. 1 (2011): 42–54. http://dx.doi.org/10.2150/jlve.35.42.

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27

Bhagavathula, Rajaram, and Ronald B. Gibbons. "Effect of Work Zone Lighting on Drivers’ Visual Performance and Perceptions of Glare." Transportation Research Record: Journal of the Transportation Research Board 2617, no. 1 (January 2017): 44–51. http://dx.doi.org/10.3141/2617-06.

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Nighttime crashes at work zones are major concerns for construction workers and motorists. Although in a majority of the U.S. states, department of transportation specifications for work zone lighting mention that contractors should reduce glare for workers and drivers, only two states advocate detailed specifications like light positions, orientation, and light levels. Although some studies have examined the impact of glare from work zone lights on workers and others have calculated veiling luminance levels for drivers in the work zone, the effect of work zone lighting on drivers’ visual performance and glare perception has never been studied in a realistic setting. The goal of this study was to understand the impact of commercially available portable light towers (metal halide, LED, and balloon) and their orientation on drivers’ visual performance and their perceptions of glare. Participants drove through a realistic work zone simulated on the Virginia Smart Road. Visual performance was assessed by a detection task and perception of visibility and glare were assessed by questionnaires. Results indicated that the type of light tower and its orientation affect visual performance and perceptions of visibility and glare. Light towers aimed toward the driver resulted in lowering drivers’ visual performance, both objectively and subjectively. When the light towers were aimed away from or perpendicular to the driver, the visual performance was higher and the differences in visual performance between the types of light towers were minimal. These findings indicate that these orientations should be preferred for work zone light towers.
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28

Ortiz-Peregrina, Sonia, Carolina Ortiz, Miriam Casares-López, José J. Castro-Torres, Luis Jiménez del Barco, and Rosario G. Anera. "Impact of Age-Related Vision Changes on Driving." International Journal of Environmental Research and Public Health 17, no. 20 (October 12, 2020): 7416. http://dx.doi.org/10.3390/ijerph17207416.

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Aging leads to impaired visual function, which can affect driving—a very visually demanding task—and has a direct impact on an individual’s quality of life if their license is withdrawn. This study examined the associations between age-related vision changes and simulated driving performance. To this end, we attempted to determine the most significant visual parameters in terms of evaluating elderly drivers’ eyesight. Twenty-one younger drivers (aged 25–40) were compared to 21 older drivers (aged 56–71). Study participants were assessed for visual acuity, contrast sensitivity, halos, and intraocular straylight, which causes veiling luminance on the retina and degrades vision. Driving performance was evaluated using a driving simulator. The relationships between simulated driving performance and the visual parameters tested were examined with correlation analyses and linear regression models. Older drivers presented impairment in most visual parameters (p < 0.05), with straylight being the most significantly affected (we also measured the associated effect size). Older drivers performed significantly worse (p < 0.05) in the simulator test, with a markedly lower performance in lane stability. The results of the multiple linear regression model evidenced that intraocular straylight is the best visual parameter for predicting simulated driving performance (R2 = 0.513). Older drivers have shown significantly poorer results in several aspects of visual function, as well as difficulties in driving simulator performance. Our results suggest that the non-standardized straylight evaluation could be significant in driver assessments, especially at the onset of age-related vision changes.
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29

Terekhova, M. S., S. I. Rudikov, A. P. Shumski, and A. P. Shkadarevich. "System for Assessing the Effectiveness of Temporary Blinding Devices." Devices and Methods of Measurements 11, no. 2 (June 26, 2020): 115–13. http://dx.doi.org/10.21122/2220-9506-2020-11-2-105-113.

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The development of non-lethal weapons and, in particular, temporary blinding devices is associated with problem of choosing boundaries of effectiveness. The aim of present work is determination of criteria for estimation of the effects of visual jamming devices action on the naked eye.The present-day scoring system used for effectiveness estimation of laser temporary blinding devices is based on maximum permissible exposure and/or accessible emission level defined for each hazard class in accordance with operating standard.In the present work we carried out analysis and modeling of the cases of application of temporary blinding laser devices. The proposed scoring system was founded on international standard IEC 60825-1-2014 as well as Manual on Laser Emitters and Flight Safety. The modeling of bright light action on observer eye was rested on CIE General Disability Glare Equation and provided quantitative description of jamming effectiveness. The main parameters used in this model and dictated by ambient light level and human eye characteristics, were veiling luminance and angle of distinguishing objects under it.In terms of exposition level and perception effects we determined six zones – unallowed, hazard, temporary blinding, discomfort, alerting, completely safe. Proposed system combined with modeling provides with visual demonstration of perceived light source and allows to describe human physiological sensation and to establish the fact of jamming at different distances. This system was the basis of the development of temporary blinding device for revelation of safe but effective spatial boundaries of action.
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30

KIM, Wookun, Ryuji SATOH, and Masaya NARASAKI. "THE PREDICTION OF THE LUMINANCE OF. A VISUAL TASK SEEN THROUGH A TRANSPARENT MATERIAL WITH A VEILING REFLECTION AND THE OPTICAL CHARACTERISTICS OF THE TRANSPARENT MATERIALS." Journal of Architecture, Planning and Environmental Engineering (Transactions of AIJ) 425 (1991): 31–36. http://dx.doi.org/10.3130/aijax.425.0_31.

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31

"Equivalent veiling luminance: Different mathematical approach to calculation." Lighting Research & Technology 23, no. 1 (March 1991): 91–93. http://dx.doi.org/10.1177/096032719102300107.

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32

McCann, John J., Vassilios Vonikakis, and Alessandro Rizzi. "Edges and gradients in lightness illusions: Role of optical veiling glare." Frontiers in Psychology 13 (December 15, 2022). http://dx.doi.org/10.3389/fpsyg.2022.958787.

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Lightness Illusions (Contrast, Assimilation, and Natural Scenes with Edges and Gradients) show that appearances do not correlate with the light sent from the scene to the eye. Lightness Illusions begin with a control experiment that includes two identical Gray Regions-Of-Interest(GrayROI) that have equal appearances in uniform surrounds. The Illusion experiment modifies “the-rest-of-the-scene” to make these GrayROIs appear different from each other. Our visual system performs complex-spatial transformations of scene-luminance patterns using two independent spatial mechanisms: optical and neural. First, optical veiling glare transforms scene luminances into a different light pattern on receptors, called retinal contrasts. This article provides a new Python program that calculates retinal contrast. Equal scene luminances become unequal retinal contrasts. Uniform scene segments become nonuniform retinal gradients; darker regions acquire substantial scattered light; and the retinal range-of-light changes. The glare on each receptor is the sum of the individual contributions from every other scene segment. Glare responds to the content of the entire scene. Glare is a scene-dependent optical transformation. Lightness Illusions are intended to demonstrate how our “brain sees” using simple-uniform patterns. However, the after-glare pattern of light on receptors is a morass of high-and low-slope gradients. Quantitative measurements, and pseudocolor renderings are needed to appreciate the magnitude, and spatial patterns of glare. Glare’s gradients are invisible when you inspect them. Illusions are generated by neural responses from “the-rest-of-the-scene.” The neural network input is the simultaneous array of all receptors’ responses. Neural processing performs vision’s second scene-dependent spatial transformation. Neural processing generates appearances in Illusions and Natural Scenes. “Glare’s Paradox” is that glare adds more re-distributed light to GrayROIs that appear darker, and less light to those that appear lighter. This article describes nine experiments in which neural-spatial-image processing overcompensates the effects of glare. This article studies the first-step in imaging: scene-dependent glare. Despite near invisibility, glare modifies all quantitative measurements of images. This article reveals glare’s modification of input data used in quantitative image analysis and models of vision, as well as visual image-quality metrics. Glare redefines the challenges in modeling Lightness Illusions. Neural spatial processing is more powerful than we realized.
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33

Mehri, Ahmad, Javad Sajedifar, Milad Abbasi, and Mohammad Ali Tajbakhsh. "The effect of veiling luminance on the disability glare of car headlamps designed in Iran." International Journal of Occupational Safety and Ergonomics, April 7, 2021, 1–6. http://dx.doi.org/10.1080/10803548.2021.1898829.

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