A representation of specular appearance

Author

Lin, Stephen ; Lee, Sang W.

Author_Institution

Michigan Univ., Ann Arbor, MI, USA

Volume

2

fYear

1999

fDate

1999

Firstpage

849

Abstract

The appearance of an object can vary considerably with changes in illumination conditions. Methods have been developed to describe these differences for diffuse reflection using the Lambertian model, but little work has been done in characterizing specular appearance. Towards a more comprehensive global reflectance descriptor, this paper focuses on a representation of specular appearance based on an approximate specular reflection model derived from Torrance-Sparrow. We propose that under certain illumination and surface conditions local specular structure can be expressed by the logarithms of three intensity-normalized photometric images. The total number of photometric images needed for representing global specular appearance depends on the object surface roughness, and we suggest an illumination planning method for determining the number of images. Experimental results demonstrate the effectiveness of this logarithmic model as a specular descriptor

Keywords

image representation; illumination planning; object surface roughness; representation; specular appearance; specular reflection model; Application software; Computer vision; Electrical capacitance tomography; Identity-based encryption; Lighting; Optical reflection; Photometry; Read only memory; Reflectivity; Shape;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Vision, 1999. The Proceedings of the Seventh IEEE International Conference on

Conference_Location

Kerkyra

Print_ISBN

0-7695-0164-8

Type

conf

DOI

10.1109/ICCV.1999.790310

Filename

790310