RELATION BETWEEN VISIBILITY AND EFFECTIVE LUMINANCE RATIO AT TRANSIENT ADAPTATION : Dynamic evaluation method of visibility utilizing effective luminance (part 2)

HDR-VDP-2: A calibrated visual metric for visibility and quality predictions n all luminance conditions

Visual metrics can play an important role in the evaluation of novel lighting, rendering, and imaging algorithms. Unfortunately, current metrics only work well for narrow intensity ranges, and do not correlate well with experimental data outside these ranges. To address these issues, we propose a visual metric for predicting visibility (discrimination) and quality (mean-opinion-score). The metr...

Dynamics of adaptation at high luminances: adaptation is faster after luminance decrements than after luminance increments.

As is well known, dark adaptation in the human visual system is much slower than is recovery from darkness. We show that at high photopic luminances the situation is exactly opposite. First, we study detection thresholds for a small light flash, at various delays from decrement and increment steps in background luminance. Light adaptation is nearly complete within 100 ms after luminance decreme...

Visibility Reflects Dynamic Changes of Effective Connectivity between V1 and Fusiform Cortex

Identifying the neural basis of visibility is central to understanding conscious visual perception. Visibility of basic features such as brightness is often thought to reflect activity in just early visual cortex. But here we show under metacontrast masking that fMRI activity in stimulus-driven areas of early visual cortex did not reflect parametric changes in the visibility of a brightness sti...

Selecting Effective Occluders for Visibility Culling

This paper deals with the problem of identifying effective occluders for visibility culling. The solid-angle metric is commonly used for measuring the potential significance of occluders from a single viewpoint. In this paper, we show that it does not extend properly to from-region occlusion calculations. We propose to measure the effectiveness of an occluder by means of the size of its umbra. ...

Dynamic Visibility and the Level Set Method