We present an algorithm for separating the shading and reflectance images of
photographed natural scenes. The algorithm exploits the constraint that in natural scenes …

Mutual illumination forms a significant component of image radiance that is not modeled by
the image irradiance equation. Its effects, which are easy to observe in real scenes, lead to …

Complex reflectance phenomena such as specular reflections confound many vision
problems since they produce image 'features' that do not correspond directly to intrinsic …

In this paper we present a method for recovering the reflectance properties of all surfaces in
a real scene from a sparse set of photographs, taking into account both direct and indirect …

Local analysis of image shading, in the absence of prior knowledge about the viewed scene,
may be used to provide information about the scene. The following has been proved. Every …

The luminance and color of surfaces in natural scenes are relatively independent under
certain linear transformations, with the luminance of a surface providing little information …

We present a process for estimating spatially-varying surface reflectance of a complex scene
observed under natural illumination conditions. The process uses a laser-scanned model of …

Mutual illumination occurs when light reflected from one surface impinges on a second one.
The resulting additional illumination incident on the second surface affects both the color …

Specular reflections and interreflections produce strong highlights in brightness images.
These highlights can cause vision algorithms for segmentation, shape from shading …

Human and machine visual sensing is enhanced when surface properties of objects in
scenes, including color, can be reliably estimated despite changes in the ambient lighting …