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Computer Science - Theoretical Computer Science | Annual Dynamics of Daylight Variability and Contrast - A Simulation-Based Approach to Quantifying

Annual Dynamics of Daylight Variability and Contrast

A Simulation-Based Approach to Quantifying Visual Effects in Architecture

Rockcastle, Siobhan, Andersen, Marilyne

2013, X, 83 p. 84 illus., 27 illus. in color.

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  • Introduces a new typological language that categorizes architectural space in terms of contrast and temporal variation
  • Proposes a new family of metrics that quantify the magnitude of contrast-based visual effects and time-based variation within daylit spaces
  • Demonstrates how, through the use of time-segmented daylight renderings, a more holistic analysis of daylight performance is made possible

Daylight is a dynamic source of illumination in architectural space, creating diverse and ephemeral configurations of light and shadow within the built environment. Perceptual qualities of daylight, such as contrast and temporal variability, are essential to our understanding of both material and visual effects in architecture.

Under the rapidly growing context of energy conscious research, there is a need to re-balance our definition of “performance” to include those perceptual and aesthetic aspects of light that are often disregarded by the world of simulation. Contrast is important to the definition of space and it is essential in understanding how architecture is enhanced and transformed over time by the dynamic and variable characteristics of daylight. Although there are a growing number of studies that seek to define the relationship between brightness, contrast, and lighting quality, the dynamic role of daylight within the visual field is underrepresented by existing metrics. Although spatial contrast and light variability are fundamental to the visual experience of architecture, architects still rely primarily on intuition and experience to evaluate their designs because there are few, if any, metrics that address these factors.

New metrics that addresses this challenge could help designers to contextualize the relative strength and temporal stability of contrast within a given architectural space, which would open up a new dimension in architectural performance. Through an analysis of contemporary architecture from around the world, the authors have developed a new typological language that categorizes architectural space in terms of contrast and temporal variation. This research proposes a new family of metrics that quantify the magnitude of contrast-based visual effects and time-based variation within daylit space through the use of time-segmented daylight renderings to provide a more holistic analysis of daylight performance.

Content Level » Research

Keywords » Annual Simulation - Architectural Lighting - Contrast - Daylighting - Dynamic - Light Rendering - Metrics - Spatial Perception - Visual Effects

Related subjects » Theoretical Computer Science

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