Multiple light source estimation in a single image
Many high‐level image processing tasks require an estimate of the positions, directions and
relative intensities of the light sources that illuminated the depicted scene. In image‐based …
relative intensities of the light sources that illuminated the depicted scene. In image‐based …
Compositing images through light source detection
Compositing an image of an object into another image is a frequently occurring task in both
image processing and augmented reality. To ensure a seamless composition, it is often …
image processing and augmented reality. To ensure a seamless composition, it is often …
Light diffuseness metric, Part 2: Describing, measuring and visualising the light flow and diffuseness in three-dimensional spaces
We introduce a way to simultaneously measure the light density, light vector and diffuseness
of the light field using a cubic illumination meter based on the spherical harmonics …
of the light field using a cubic illumination meter based on the spherical harmonics …
The visual light field in real scenes
Human observers' ability to infer the light field in empty space is known as the “visual light
field.” While most relevant studies were performed using images on computer screens, we …
field.” While most relevant studies were performed using images on computer screens, we …
Light direction from shad (ow) ed random Gaussian surfaces
Three human observers estimated the illumination direction for samples of random
Gaussian surfaces illuminated by a collimated beam from random directions. These stimuli …
Gaussian surfaces illuminated by a collimated beam from random directions. These stimuli …
[HTML][HTML] Light fields and shape from shading
From a theoretical point of view, the use of the shading cue involves estimates of the light
field and thus observers need to judge the light field and the shape simultaneously. The …
field and thus observers need to judge the light field and the shape simultaneously. The …
Shape from shading under inconsistent illumination
People are able to perceive the 3D shape of illuminated surfaces using image shading cues.
Theories about how we accomplish this often assume that the human visual system …
Theories about how we accomplish this often assume that the human visual system …
Optical navigation for a spacecraft in a planetary system
JA Christian - 2010 - repositories.lib.utexas.edu
Recent years have seen ambitious robotic exploration missions to other planets and a
renewed interest in sending humans beyond low Earth orbit. These activities give rise to a …
renewed interest in sending humans beyond low Earth orbit. These activities give rise to a …
[HTML][HTML] Sun and sky: Does human vision assume a mixture of point and diffuse illumination when interpreting shape-from-shading?
AJ Schofield, PB Rock, MA Georgeson - Vision Research, 2011 - Elsevier
People readily perceive smooth luminance variations as being due to the shading produced
by undulations of a 3-D surface (shape-from-shading). In doing so, the visual system must …
by undulations of a 3-D surface (shape-from-shading). In doing so, the visual system must …
[HTML][HTML] Local luminance amplitude modulates the interpretation of shape-from-shading in textured surfaces
AJ Schofield, G Hesse, PB Rock, MA Georgeson - Vision research, 2006 - Elsevier
The pattern of illumination on an undulating surface can be used to infer its 3-D form (shape-
from-shading). But the recovery of shape would be invalid if the luminance changes actually …
from-shading). But the recovery of shape would be invalid if the luminance changes actually …