Many visual effects are believed to be processed at several functional and anatomical levels
of cortical processing. Determining if and how the levels contribute differentially to these …

Visual contrast is one of the most studied notions in the field of Visual Neuroscience and
Psychophysics. It is a measure associated with a psycho-physical sensation that is not easy …

Visual evoked potentials (VEPs) to temporal modulation of spatial patterns, recorded from
humans ranging in age from 4-42 years, demonstrated that contrast-dependent responses …

It is well known that prolonged observation of a high-contrast stimulus alters the perception
of a subsequent test stimulus. Previous studies of perceived contrast shifts only reported …

In the effort to understand and model human spatial vision it is crucial to understand how
visual responses vary with image contrast, and one route to an understanding of contrast …

One of the primary objectives of early visual processing is the detection of luminance
variations, often termed image contrast. Normal observers can differ in this ability by at least …

In the previous chapter I described three types of measurement that converged on a
common picture of “contrast brightness.” This was a single bipolar dimension that included …

To understand how different spatial frequencies contribute to the overall perceived contrast
of complex, broadband photographic images, we adapted the classification image …

Psychophysical approaches that allow us to estimate how perceived stimulus intensity is
linked to physical intensity are import tools for studying nonlinear transformations of visual …

Background When we are viewing natural scenes, every saccade abruptly changes both the
mean luminance and the contrast structure falling on any given retinal location. Thus it …