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Edge-aware filters for separable irradiance in global illumination rendering

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/21014

Edge-aware filters for separable irradiance in global illumination rendering

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dc.contributor.author Xiao, Lei
dc.date.accessioned 2012-08-27T21:59:43Z
dc.date.available 2012-08-27T21:59:43Z
dc.date.issued 2012-08-27
dc.date.submitted July 2012
dc.identifier.uri http://hdl.handle.net/1928/21014
dc.description.abstract Monte Carlo (MC) rendering can produce photorealistic global illumination but results in noise at low sample rates. One way to improve the image quality is to apply noise reduction filters on the samples output by the MC rendering system. The challenge of filtering methods is to preserve the scene and shadow details when removing the MC noise. In this paper, we propose a new filtering algorithm for global illumination in Lambertian scenes. We reconstruct the direct and indirect irradiance with separate edge-aware filters and generate final images with deferred shading. To preserve the shadow edges, we introduce a new feature called distance ratio into our filter. The distance ratio provides a simple and effective way to detect the shadowed regions in image space. We show that our algorithm approximates the MC integral better than previous methods, especially when the scenes are very noisy due to large area light sources or environment maps. en_US
dc.language.iso en_US en_US
dc.subject Monte Carlo en_US
dc.subject Global Illumination en_US
dc.subject Irradiance en_US
dc.subject Cross Bilateral Filter en_US
dc.subject Distance Ratio en_US
dc.subject.lcsh Rendering (Computer graphics)
dc.subject.lcsh Three-dimensional imaging.
dc.subject.lcsh Shades and shadows.
dc.subject.lcsh Digital filters (Mathematics)
dc.title Edge-aware filters for separable irradiance in global illumination rendering en_US
dc.type Thesis en_US
dc.description.degree Computer Engineering en_US
dc.description.level Masters en_US
dc.description.department University of New Mexico. Dept. of Electrical and Computer Engineering en_US
dc.description.advisor Sen, Pradeep
dc.description.committee-member Sen, Pradeep
dc.description.committee-member Kniss, Joe
dc.description.committee-member Pattichis, Marios


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