Computational Modeling Basis in the Photostress Recovery Model (PREMO).

摘要

A model that predicts the impact of optical radiation on visual function has been developed. The model assesses the impact of glare and glare recovery on performance by tracing the propagation of light from the source to the eye and determining the effect on visual contrast sensitivity. This capability analyzes broadband and extended sources, supports complex visual tasks, and displays a visualization of the post exposure visual recovery process. The model is composed of four components: a scene generation component, an optical source processing component, a glare and flashblindness component, and an identification/recognition component. The scene generation component utilizes an off-the-shelf 3D scene viewer that allows the user to set up a scenario in 3D space and uses the geometry of that scenario to create a perceived scene relative to an observer in the scenario. The optical source processing component propagates the source image to the observer's eye position and computes the retinal distribution of the optical source. The photostress recovery component determines how the optical radiation exposure obscures the visual scene through the process of contrast reduction and how visual sensitivity recovers after the exposure has been terminated. Finally, the identification/recognition component determines the probability of identifying/recognizing a given target at any post exposure point in time.