no / Visual psychophysicists, who study object, color, and light perception, have a demand for software that produces
complex but, at the same time, physically accurate stimuli for their experiments. The number of computer
graphic packages that simulate the physical interaction of light and surfaces is limited, and mostly they require
the purchase of a license. RADIANCE (Ward, 1994), however, is freely available and popular in the visual
perception community, making it a prime candidate. We have shown previously that RADIANCE¿s simulation
accuracy is greatly improved when color is coded by spectra, rather than by the originally envisaged RGB triplets
(Ruppertsberg & Bloj, 2006). Here, we present a method for spectral rendering with RADIANCE to generate
hyperspectral images that can be converted to XYZ images (CIE 1931 system) and then to machine-dependent
RGB images. Generating XYZ stimuli has the added advantage of making stimulus images independent of
display devices and, thereby, facilitating the process of reproducing results across different labs. Materials associated
with this article may be downloaded from www.psychonomic.org.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/4768 |
| Date | January 2008 |
| Creators | Ruppertsberg, Alexa I., Bloj, Marina |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Article |
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