Lambertian Correction for Rough and Specular Surfaces

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Date
2003
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
This 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.
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@inproceedings{
10.2312:vvg.20031029
, booktitle = {
Vision, Video, and Graphics (VVG) 2003
}, editor = {
Peter Hall and Philip Willis
}, title = {{
Lambertian Correction for Rough and Specular Surfaces
}}, author = {
Robles-Kelly, A.
and
Hancock, E.R.
}, year = {
2003
}, publisher = {
The Eurographics Association
}, ISBN = {
3-905673-54-1
}, DOI = {
10.2312/vvg.20031029
} }
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