Deflectometry as a technique to assess reflective surfaces has now existed for some 40
years. Its different aspects and variations have been studied in multiple theses and research …

Since the first shape-from-shading (SFS) technique was developed by Horn in the early
1970s, many different approaches have emerged. In this paper, six well-known SFS …

Human faces are remarkably similar in global properties, including size, aspect ratio, and
location of main features, but can vary considerably in details across individuals, gender …

We introduce two appearance-based methods for clustering a set of images of 3D (three-
dimensional) objects, acquired under varying illumination conditions, into disjoint subsets …

In this paper, we present an approach to color image understanding that can be used to
segment and analyze surfaces with color variations due to highlights and shading. The work …

In this paper, we present an extremely simple algorithm for shape from shading, which can
be implemented in 25 lines of C code∗. The algorithm is very fast, taking 0.2 seconds on a …

Many algorithms have been suggested for the shape-from-shading problem, and some
years have passed since the publication of the survey paper by Zhang et al.[R. Zhang, P.-S …

Depth from Focus (DFF) and Depth from Defocus (DFD) methods are theoretically unified
with the geometric triangulation principle. Fundamentally, the depth sensitivities of DFF and …

We consider the problem of determining functions of an image of an object that are
insensitive to illumination changes. We first show that for an object with Lambertian …

The human visual system is proficient in perceiving three-dimensional shape from the
shading patterns in a two-dimensional image. How it does this is not well understood and …