چکیده (انگلیسی):

In the last years the development of interactive Computer-based methods for building virtual and
physical 2.5D models from single shaded images faced with an exponential growth. In particular, a
wide range of methods based on image processing-based procedures and on Shape From Shading
(SFS) can be documented. On the basis of the most favorable techniques devised in literature, the
present work describes an improved interactive method capable of retrieving 2.5D models using image
shading information. The pro-posed method performs a SFS-based reconstruction where (1) the overall
geometry of the expected surface is first recovered and (2) the final 2.5D reconstruction is obtained by
minimizing a suitable functional using the rough surface as an initialization function. The method
improves previous interactive works by introducing a novel two-step rough surface recovery and a new
definition of a functional to be minimized for solving the SFS problem. Tested against a set of case
studies the proposed method proves to be effective in providing 2.5D models.