Academic Article
Obtaining 3-dimensional shape of textured and specular surfaces using four-source photometry
- Title
- Obtaining 3-dimensional shape of textured and specular surfaces using four-source photometry
- Creator(s)
- Coleman, E. North
- Jain, Ramesh
- Date
- 1982
- Is Part Of
- Computer Graphics and Image Processing
- Volume
- 18
- Issue
- 4
- Pages
- 309-328
- Language
- eng
- ISSN
- 0146-664X
- Abstract
- Thephotometric stereo method is extended to four-source photometry for obtaining 3-dimensional shapes of visually textured and specular surfaces from intensity values. The table look-up approach (based on reflectance maps) for determining surface normals is shown to be of limited value in this context and a more direct method of computing these normals is used. Our method also eliminates the requirement of a preliminary system calibration procedure. The method is applied to real images as a test of its applicability.
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