Surface descriptions from stereo and shading
Image and Vision Computing
Understanding image intensities
Readings in computer vision: issues, problems, principles, and paradigms
Zero crossings on lines of curvature
Computer Vision, Graphics, and Image Processing
Shape from shading
The Eikonal equation: some results applicable to computer vision
Shape from shading
Obtaining shape from shading information
Shape from shading
Calculating the reflectance map
Shape from shading
Photometric invariants related to solid shape
Shape from shading
Height and gradient from shading
International Journal of Computer Vision
Estimation of Illuminant Direction, Albedo, and Shape from Shading
IEEE Transactions on Pattern Analysis and Machine Intelligence
Robot Vision
Existence and Uniqueness in Shape from Shading
Existence and Uniqueness in Shape from Shading
IEEE Transactions on Pattern Analysis and Machine Intelligence
Ambiguous Shape from Shading with Critical Points
Journal of Mathematical Imaging and Vision
Shape from Shading and Viscosity Solutions
ECCV '02 Proceedings of the 7th European Conference on Computer Vision-Part II
ICPR '98 Proceedings of the 14th International Conference on Pattern Recognition-Volume 2 - Volume 2
A Generic and Provably Convergent Shape-from-Shading Method for Orthographic and Pinhole Cameras
International Journal of Computer Vision
Numerical methods for shape-from-shading: A new survey with benchmarks
Computer Vision and Image Understanding
ACM SIGGRAPH 2010 papers
Variable-Source Shading Analysis
International Journal of Computer Vision
Intuitive shape modeling by shading design
SG'05 Proceedings of the 5th international conference on Smart Graphics
Hiding a second appearance in a physical relief surface
IH'12 Proceedings of the 14th international conference on Information Hiding
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It is shown that shaded images that cannot have originated from a uniformly illuminated, smooth continuous surface with uniform albedo exist. The typical condition where this occurs is when a dark area (corresponding to a region of high gradient) is surrounded by a lighter region (with low gradient). For this to correspond to a real surface, it must be established that there is a local extremum or area of lower gradient inside the dark region. This, in turn, will show up as either a light area in the image or an orientation discontinuity in the surface (thus violating either intensity or smoothness constraints). The impossibility of a shaded image can be established by counting the number of extrema inside a region corresponding to an isolated surface patch.