Investigation of Evalglare software, daylight glare probability and high dynamic range imaging for daylight glare analysis

Suk, Jae Yong; Schiler, Marc

doi:10.1177/1477153512458671

Cited by 53 publications

(24 citation statements)

References 5 publications

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“…Glare is a multi-facetted and complex phenomenon. While a few automated tools have been developed to assist in quantitatively analyzing the relationship between glare and visibility in architectural spaces (e.g., [28, 29]), little is currently known about how to extend these tools to account for significant levels of low vision. Contrast sensitivity decreases at low light levels [30] and is affected by both spatial and temporal adaptation [12, 31, 32].…”

Section: Discussionmentioning

confidence: 99%

Simulating visibility under reduced acuity and contrast sensitivity

Thompson¹,

Legge²,

Kersten³

et al. 2017

J. Opt. Soc. Am. A

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Architects and lighting designers have difficulty designing spaces that are accessible to those with low vision, since the complex nature of most architectural spaces requires a site-specific analysis of the visibility of mobility hazards and key landmarks needed for navigation. We describe a method that can be utilized in the architectural design process for simulating the effects of reduced acuity and contrast on visibility. The key contribution is the development of a way to parameterize the simulation using standard clinical measures of acuity and contrast sensitivity. While these measures are known to be imperfect predictors of visual function, they provide a way of characterizing general levels of visual performance that is familiar to both those working in low vision and our target end-users in the architectural and lighting design communities. We validate the simulation using a letter recognition task.

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Section: Discussionmentioning

confidence: 99%

Simulating visibility under reduced acuity and contrast sensitivity

Thompson¹,

Legge²,

Kersten³

et al. 2017

J. Opt. Soc. Am. A

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“…Recently developed Daylight Glare Probability (DGP) metric is formed basing on the experimental results of a research and is calculated with Equation 3 (Jakubiec, Reinhart, 2012). In several studies using DGP method, better correlation with human subject's response is found compared to DGI (Jakubiec, Reinhart, 2012;Suk, Schiler, 2013). In this metric, glare probabilities higher than 30% are found to cause perceptible glare for the occupants.…”

Section: Assessment Of Façade Designs In Terms Of Control Of Glarementioning

confidence: 99%

Proposal of a façade design approach for daylight performance determination in buildings

Yılmaz¹

2016

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Daylighting is a key component for incorporating visual comfort conditions and reducing energy consumption in buildings. In order to assess daylight potential in the building design phase, diverse performance metrics are developed and are being used in building design phase. These metrics are also integrated into several dynamic lighting simulation algorithms so architects, lighting designers or façade consultants can practically determine the daylight performance of designated façade alternatives in terms of daylight availability, compare design variants and perform necessary revisions during the building design phase. This study deals with proposal of a façade design process in terms of daylight performance determination and aims to describe current daylight metrics that can be used for façade design and applications. Proposed process consists of determination stages based on daylight illuminance, control of glare and view out conditions. With the implementation of this process to façade design, it is possible to provide visual comfort conditions and minimise lighting energy efficiency in buildings.

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“…This new method was implemented in the lighting calculation engine Radiance [18], through the purposely-developed tool Evalglare [19]. The calculation of DGP requires a High Dynamic Range (HDR) image (a photography or an image generated through a simulation) and a long computation time (especially for an annual glare analysis) to process luminances/illuminances in the scene with respect to one or more positions and directions of observations [20]. Moreover, a study by Pierson et al [21] highlighted how a superficial understanding of the input data for Evalglare may lead to an inappropriate detection of glare sources, which in turn may determine an inaccurate estimation of glare indices.…”

Section: Introductionmentioning

confidence: 99%

A Simplified Approach for the Annual and Spatial Evaluation of the Comfort Classes of Daylight Glare Using Vertical Illuminances

et al. 2018

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A simplified approach to calculate the daylight glare comfort class (imperceptible, perceptible, disturbing, or intolerable glare) on annual basis and for a grid of points in a space is presented. This method relies on the calculation of the vertical illuminance (Ev) for each grid point only, which is compared to an Ev threshold value for each daylight glare comfort class. These Ev threshold values are determined through a comparison with the Daylight Glare Probability (DGP) values on an annual basis through a fault-detection technique, for a reduced number of points. Compared to an annual calculation of exact DGP values on a certain grid, this approach is able to evaluate the daylight glare comfort classes only, but it is less time consuming. The paper presents and critically discusses this simplified method by means of its application to different case-studies: south and west oriented office in Turin (Lat 45.1° N), in which the DGP is assessed for three points in the space, considering glazing with different transmission properties (specular or scattering) and visible transmittances, as well as three operable internal shading systems (one venetian blinds and two roller blinds, for solar or glare control). For the presented case studies, the average error in the classification of the space according to daylight glare comfort classes is below 5% when comparing this simplified approach to related DGP values.

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Investigation of Evalglare software, daylight glare probability and high dynamic range imaging for daylight glare analysis

Cited by 53 publications

References 5 publications

Simulating visibility under reduced acuity and contrast sensitivity

Simulating visibility under reduced acuity and contrast sensitivity

Proposal of a façade design approach for daylight performance determination in buildings

A Simplified Approach for the Annual and Spatial Evaluation of the Comfort Classes of Daylight Glare Using Vertical Illuminances

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