Annual Dynamics of Daylight Variability and Contrast: A by Siobhan Rockcastle

By Siobhan Rockcastle

Daylight is a dynamic resource of illumination in architectural house, growing various and ephemeral configurations of sunshine and shadow in the equipped surroundings. Perceptual traits of sunlight, similar to distinction and temporal variability, are necessary to our knowing of either fabric and visible results in structure. even though spatial distinction and lightweight variability are primary to the visible event of structure, architects nonetheless depend totally on instinct to judge their designs simply because there are few metrics that deal with those elements. via an research of latest structure, this paintings develops a brand new typological language that categorizes architectural house when it comes to distinction and temporal version. This study proposes a brand new kin of metrics that quantify the importance of contrast-based visible results and time-based version inside daylit house by utilizing time-segmented sunlight renderings to supply a extra holistic research of sunlight performance.

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Our analysis will determine which luminous characteristics contributed to our initial categorization of each space. These S. Rockcastle and M. 1007/978-1-4471-5233-0_4, Ó The Author(s) 2013 37 38 4 Defining New Metrics for Contrast and Variability Fig. 1 Typological matrix with indicate intuitive scales for contrast and variability characteristics will then be broken down into a quantifiable method for both spatial contrast and temporal variability. To determine how qualitative effects regarding contrast and/or variability can be differentiated, we must first understand these concepts on an intuitive level.

5) Fig. 7 Plot of luminance variability values for 10 case studies. 1 Category One, Direct and Exaggerated Category one, Direct and Exaggerated, modeled to represent a highly contrasted and variable space, demonstrates a consistently high degree of spatial contrast throughout the year (Fig. 8). The temporal map in Fig. 3 Case Study Results 59 Fig. 8 Annual renderings for category one, Direct and Exaggerated Fig. m. m. in the summer months when the sun is directly overhead, while the temporal map of luminance variability in Fig.

Although jpeg images have a narrower range of pixel information (0–255) than that of HDR images, the compression is linear and represents a proof-of-concept within the limits of what we can observe on screen. A method that utilizes tone-mapped HDR images is necessary to measure the space with dynamics more closely related to the human eye. This will be explored in depth as the research progresses. The date and time for each rendering can be adjusted for various latitudes to accurately describe even daily subdivisions.

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