Lambertian Correction for Rough and Specular Surfaces

dc.contributor.authorRobles-Kelly, A.en_US
dc.contributor.authorHancock, E.R.en_US
dc.contributor.editorPeter Hall and Philip Willisen_US
dc.date.accessioned2016-02-09T10:27:07Z
dc.date.available2016-02-09T10:27:07Z
dc.date.issued2003en_US
dc.description.abstractThis paper describes a method for performing Lambertian reflectance for rough and specular surfaces. Rather than using an existing reflectance model, we present a method for estimating the reflectance function from image data. The method makes use of the Gauss map between a surface and a unit sphere. Under conditions in which the light source direction and the viewer direction are identical, we show how the reflectance function can be represented by a polar function on the unit sphere. We pose the problem of recovering the reflectance function as that of estimating a tabular representation of the polar function. A simple analysis shows how the tabular representation of the reflectance function can be obtained using the accumulative distribution of image gradients. By modifying the reflectance function and back-projecting, we can render the surface with alternative lighting models. Here, we choose to back-project a Lambertian reflectance model. This allows us to be remove specularities from shiny surfaces and compensate from boundary ''flattening'' for rough surfaces. We illustrate the utility of the method on a variety of real world imagery.en_US
dc.description.sectionheadersTexture and Surface Propertiesen_US
dc.description.seriesinformationVision, Video, and Graphics (VVG) 2003en_US
dc.identifier.doi10.2312/vvg.20031029en_US
dc.identifier.isbn3-905673-54-1en_US
dc.identifier.pagesA. Robles-Kelly and E.R. Hancock-I.4.8 [Image Processing and Computer Vision]: Lambertian correction, BRDF approximationen_US
dc.identifier.urihttps://doi.org/10.2312/vvg.20031029en_US
dc.publisherThe Eurographics Associationen_US
dc.subjectI.4.8 [Image Processing and Computer Vision]en_US
dc.subjectLambertian correctionen_US
dc.subjectBRDF approximationen_US
dc.titleLambertian Correction for Rough and Specular Surfacesen_US
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