A toolbox for volumetric visualization of light properties

In this paper, we introduce a toolbox for the perceptually based visualization of light in a volume, focusing on the visual effects of illumination. First, our visualizations extend the conventional methods from a two-dimensional representation on surfaces to the whole volume of a scene. Second, we extend the conventional methods from showing...

Structures of Physical and Visual Light Fields: Measurement, Comparison and Visualization

It is impossible to see the light in an empty space, we can only observe light as emission from a light source or reflections from objects. Yet, human observers can estimate the illumination in empty parts of an observed scene, based on the appearance of surrounding objects. This dissertation presents studies on human sensitivity to the light...

Visual Light Zones

In this article, we studied perception of a particular case of light fields that is characterized by a difference in its consistent structure between parts of a scene. In architectural lighting design, such a consistent structure in a part of a light field is called a light zone. First, we explored whether human observers are sensitive to...

The global structure of the visual light field and its relation to the physical light field

Human observers have been demonstrated to be sensitive to the local (physical) light field, or more<br/>precisely, to the primary direction, intensity, and diffuseness of the light at a point in a space. In the<br/>present study we focused on the question of whether it is possible to reconstruct the global visual light field, based on observers’...