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

By Siobhan Rockcastle

ISBN-10: 1447152328

ISBN-13: 9781447152323

ISBN-10: 1447152336

ISBN-13: 9781447152330

Daylight is a dynamic resource of illumination in architectural house, developing diversified and ephemeral configurations of sunshine and shadow in the equipped surroundings. Perceptual characteristics of sunlight, comparable to distinction and temporal variability, are necessary to our figuring out of either fabric and visible results in structure. even though spatial distinction and light-weight variability are primary to the visible adventure of structure, architects nonetheless depend totally on instinct to guage their designs simply because there are few metrics that deal with those components. 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 edition. This study proposes a brand new relatives of metrics that quantify the importance of contrast-based visible results and time-based version inside daylit area by using time-segmented sunlight renderings to supply a extra holistic research of sunlight performance.

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Extra info for Annual Dynamics of Daylight Variability and Contrast: A Simulation-Based Approach to Quantifying Visual Effects in Architecture

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7 contains a pixelated image of daylight within space and represents the local differences between the brightness of each pixel and that of its neighbor. If we add up all the local differences, represented in red, we can compute a total sum of difference across the image. The problem with this number, as it exists currently, is that it is dependent on the pixel density of the original image and cannot be numerically compared to images of a different density. To get around this issue, it is necessary to represent the metric as a ratio between the total difference in local values and the maximum difference that the image could achieve as a result of its pixel density.

Once we have produced these annual sets of renderings, we can generate data for annual spatial contrast and annual luminance variability and map those effects over the year to see how they are affected by dynamic sun conditions. 3 Case Study Results To calculate annual spatial contrast and annual luminance variability, each set of radiance renderings is imported into MATLAB so that individual images may be processed and data may be overlaid between images. The results of these metrics can be seen in their application to each of the following four typological models: category one (Direct and Exaggerated), category four (Partially Direct and Screened), category nine (Indirect and Dispersed), and category ten (Indirect and Diffuse).

1007/978-1-4471-5233-0_5, Ó The Author(s) 2013 53 54 5 Application of New Metrics to Abstract Spatial Models Fig. 1 Ten case study spaces, digitally modeled and rendered for analysis Fig. 2 Workflow diagram showing the potential of various modeling software packages The second method relies on digital photographs, which can be generated from the documentation of a scaled physical model or an existing architectural space. , rotating the model to approximate daily and hourly sun positions), it can be even more challenging to capture time-segmented photographs within an existing space.

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Annual Dynamics of Daylight Variability and Contrast: A Simulation-Based Approach to Quantifying Visual Effects in Architecture by Siobhan Rockcastle


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