Spectral Volume Rendering
نویسندگان
چکیده
We describe a method for volume rendering using a spectral representation of colour instead of RGB. Full spectra allow the generation of physically correct rendering of a scene under different lighting conditions. To make the method practicable, a new low-dimension subspace method is used to act as the carrier of spectral information. To fully exploit spectra, we introduce the technique of post-illumination to generate new spectral images for arbitrary light colours in real-time. As well, a tool is developed to design a palette of lights and materials having certain properties, such as selective metamerism or colour constancy. Applied to spectral transfer functions, different light colours can accentuate or hide specific qualities of the data. In conjunction with post-illumination this provides a new means for preparing data for visualization and forms a new degree of freedom for guided exploration of volumetric data sets. Technical Report School Of Computing Science Simon Fraser University SFU-CMPT-03/02-TR2002-03
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