background luminance

[′bak‚grau̇nd ′lüm·i·nəns]

(optics)

In visual-range theory, the brightness of the background against which a target is viewed.

Mentioned in ?

threshold illuminance

References in periodicals archive ?

In the dark region, [alpha] = 0, indicating that the perceived contrast doesn't depend on the background luminance and is a function only of the absolute luminance difference [DELTA]B.

Human visual system based automatic underwater image enhancement in NSCT domain

Stimuli are presented upon a liquid crystal display screen, at a mesopic background luminance of 1.

Microperimetry--a clinical overview

8226; RVR Measurement System based on forward-scatter meters equipped with background luminance (ambient light) sensor.

Unique System FZE Aids in Completion of the Automatic Weather Observation System Project on an International Airport in the UAE

The notion that, in older adults, contrast sensitivity impairment increases with decreasing background luminance and that the determinants of this phenomenon are partially neural is not new in the literature (10,26).

Differential effects of aging on spatial contrast sensitivity to linear and polar sine-wave gratings

Before visual testing the subjects were given 30 minutes to adapt to the background luminance in both installations of lighting with HPS and LEDs.

Comparative in situ study of LEDs and HPS in road lighting

As it was already mentioned that the size, background luminance, and luminance contrast of the visual target determines its visibility, the age of the observer should be pointed out as well.

Legibility of urban highway traffic signs using new retroreflective materials

W] is ratio of task and background luminance difference and background luminance.

Influence of chromatic ambient light over colour luminance contrast on projection screen/Spalvotos pasalines sviesos itaka spalvu skaiscio kontrastui ekrane

The latter is the estimated sensitivity of the pilot's eyes as derived from the measured background luminance.

Measuring the RVR: Pekka Utela of Vaisala looks at the cutting edge of runway visual range technology. (ATM)

In general the effect of glare will increase when the source luminance increases, the background luminance decreases, and the angle between the line of sight and the direction of the light source decreases (see, e.

Relation between glare and driving performance

It had to have very carefully controlled lighting levels, partly because many of the screens and optical devices need low background luminance.

CERULEAN SCIENCE

The EL display offers excellent contrast and negligible background luminance, which has been found to result in faster recognition and response time.

DaimlerChrysler Human Factors Evaluation Finds Planar Systems Electroluminescent Display Provides ``Superior Visual Performance''

Mean, standard deviation and median of background luminance in different density of light patterns BGD Level Mean Pixel Std Dev Brightness Scene 1 High 54.

Visual saliency of urban objects at night: impact of the density of background light patterns

Full browser ?

CITE

Site: Follow: Share:

Open / Close