The principle of structured light and triangulation is used in a wide range of 3D optical
metrology applications, such as mechanical engineering, industrial monitoring, computer …

This paper reviews recent developments of non-contact three-dimensional (3D) surface
metrology using an active structured optical probe. We focus primarily on those active non …

Transparent and semi-transparent materials pose significant challenges for existing scene
understanding and segmentation algorithms due to their lack of RGB texture which impedes …

Time-of-flight (TOF) cameras provide a depth value at each pixel, from which the 3D
structure of the scene can be estimated. This new type of active sensor makes it possible to …

Segmentation of transparent objects is a hard, open problem in computer vision.
Transparent objects lack texture of their own, adopting instead the texture of scene …

Coarse depth maps can be enhanced by using the shape information from polarization
cues. We propose a framework to combine surface normals from polarization (hereafter …

In optical metrology, fringe projection is considered to be one of the most reliable techniques
for recovering the shape of objects. For this technique, however, it is challenging to measure …

Vision in scattering media is important but challenging. Images suffer from poor visibility due
to backscattering and attenuation. Most prior methods for scene recovery use active …

We estimate surface normal maps of an object from either its diffuse or specular reflectance
using four spherical gradient illumination patterns. In contrast to traditional photometric …

Traditional fringe-projection three-dimensional (3D) imaging techniques struggle to estimate
the shape of high dynamic range (HDR) objects where detected fringes are of limited …