Boundary conditions for Shape from Shading
This addresses a specific challenge in computer vision for researchers, but appears incremental as it builds on prior work by highlighting limitations.
The paper tackles the problem of local ambiguity in Shape from Shading for 3D reconstruction from a single grayscale image, showing that using singular points alone is insufficient and requires additional object information.
The Shape From Shading is one of a computer vision field. It studies the 3D reconstruction of an object from a single grayscale image. The difficulty of this field can be expressed in the local ambiguity (convex / concave). J.Shi and Q.Zhu have proposed a method (Global View) to solve the local ambiguity. This method based on the graph theory and the relationship between the singular points. In this work we will show that the use of singular points is not sufficient and requires further information on the object to resolve this ambiguity.