Reconstructing the shape of an object from images is an important problem in computer
vision that has led to a variety of solution strategies. This survey covers photometric stereo …

We conduct a thorough study of photometric stereo under nearby point light source
illumination, from modeling to numerical solution, through calibration. In the classical …

In this work we solve the uncalibrated photometric stereo problem with lights placed near the
scene. We investigate different image formation models and find the one that best fits our …

Decomposing a scene into its 3D geometry, surface material textures, and illumination is a
challenging but important problem in computer vision and graphics. While recent neural …

We present a light position calibration technique based on a general arrangement of at least
two reflective spheres in a single image. Contrary to other techniques we do not directly …

Abstract Conventional Photometric Stereo (PS) techniques are usually based on the
assumption that the light sources are assumed sufficiently far from the object that all …

Accurate measurement and calibration of the light position or the lighting direction is
essential for pixel-level 3-D reconstruction based on photometric stereo. Differing from …

Accurate lightsource location or direction is important in shape from shading (SFS) and
photometric stereo (PS). Tracking interested object by the lightsources on it is also a widely …

In this paper, a calibration method for non-isotropic point light source is developed, which is
capable of calibrating position and orientation of the point light source with a single image …

We present a method for geometric point light source calibration. Unlike prior works that use
Lambertian spheres, mirror spheres, or mirror planes, we use a calibration target consisting …