Back to Search
Start Over
Local shape approximation from shading
- Source :
- CVPR
- Publication Year :
- 2003
- Publisher :
- IEEE Comput. Soc. Press, 2003.
-
Abstract
- Shading can be used as an independent cue for exact shape recovery, or it can be used as a supplementary cue for shape interpolation between features whose depths are known from other cues. Exact shape cannot be inferred from a local analysis of shading. However, for shape interpolation a crude local approximation may be sufficient. This paper explores the limits of such local approximations that are easy to compute. In particular, the shape of shading is used to approximate the surface in areas of monotonic change of intensity. This analysis is accompanied by a method for computing the direction of a single-point light source from the shading on occluding contours. A qualitative classification of shape near shading singularities is also discussed.
- Subjects :
- Statistics and Probability
Surface (mathematics)
Approximation theory
Shape approximation
Applied Mathematics
Mathematical analysis
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Geometry
Monotonic function
Condensed Matter Physics
Computer Science::Graphics
Photometric stereo
Local analysis
Modeling and Simulation
Active shape model
Computer Science::Multimedia
Gravitational singularity
Geometry and Topology
Computer Vision and Pattern Recognition
Shading
Intensity (heat transfer)
Interpolation
ComputingMethodologies_COMPUTERGRAPHICS
Shape analysis (digital geometry)
Mathematics
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Proceedings 1992 IEEE Computer Society Conference on Computer Vision and Pattern Recognition
- Accession number :
- edsair.doi.dedup.....53213b3b4a6c7d145a06109db6553abe