Artificial Intelligence
The local structure of image discontinuities in one dimension
IEEE Transactions on Pattern Analysis and Machine Intelligence
Obtaining shape from shading information
Shape from shading
SHAPE FROM SHADING: A METHOD FOR OBTAINING THE SHAPE OF A SMOOTH OPAQUE OBJECT FROM ONE VIEW
SHAPE FROM SHADING: A METHOD FOR OBTAINING THE SHAPE OF A SMOOTH OPAQUE OBJECT FROM ONE VIEW
The Image Irradiance Equation: Its Solution and Application
The Image Irradiance Equation: Its Solution and Application
3-D Shape from a Shaded and Textural Surface Image
IEEE Transactions on Pattern Analysis and Machine Intelligence
Parametric Shape-from-Shading by Radial Basis Functions
IEEE Transactions on Pattern Analysis and Machine Intelligence
Shading Logic: A Heuristic Approach to Recover Shape from Shading
IEEE Transactions on Pattern Analysis and Machine Intelligence
Darboux Frames, Snakes, and Super-Quadrics: Geometry from the Bottom Up
IEEE Transactions on Pattern Analysis and Machine Intelligence
Robust recovery of multiple light source based on local light source constant constraint
Pattern Recognition Letters
| Hi-index | 0.14 |
An apparent contradiction in the shape-from-shading literature is examined. Although practical experience suggests that shape can be inferred from the local analysis of shading, mathematical analyses support the opposite. A criterion for exact surface recovery is derived, and it is shown that, as a result of surface geometry, elliptic, hyperbolic, and doubly curved surfaces could be recovered to reasonable accuracy provided that surface curvature and/or foreshortening were limited. In other words, by relaxing the requirement that surfaces be recovered exactly, it is found that local analysis of shading can provide useful descriptions of shape as evidenced by the results presented.