Human visual performance model for crewstation design

1991 ◽  
Author(s):  
James O. Larimer ◽  
Michael P. Prevost ◽  
Aries R. Arditi ◽  
Steven Azueta ◽  
James R. Bergen ◽  
...  
Keyword(s):  
Performance Model ◽  
Visual Performance

scholarly journals LEGIBILITY OF URBAN HIGHWAY TRAFFIC SIGNS USING NEW RETROREFLECTIVE MATERIALS

Transport ◽  
2010 ◽  
Vol 25 (3) ◽  
pp. 229-236 ◽  
Author(s):  
John D. Bullough ◽  
Nicholas P. Skinner ◽  
Conan P. O’Rourke
Keyword(s):  
Urban Area ◽  
Performance Model ◽  
Visual Performance ◽  
Practical Significance ◽  
Department Of Transportation ◽  
Highway Traffic ◽  
Traffic Signs ◽  
Photometric Measurements ◽  
Highway Signs

Unlighted highway signs, which use newly developed retroreflective materials, were installed along the major expressway in an urban area by the local department of transportation. Photometric measurements of the signs were used to assess their legibility applying the relative visual performance model, in comparison to lighted signs, con‐ forming to recommended illumination practices. The calculated visibility of the measured unlighted signs was similar to that of the signs equipped with exterior sign illumination. The practical significance and limitations of the relative visual performance approach are discussed.

Work Zone Lighting and Visual Performance

2013 ◽  
Vol 2337 (1) ◽  
pp. 25-34 ◽  
Author(s):  
John D. Bullough ◽  
Ute C. Besenecker ◽  
Jeremy D. Snyder ◽  
Nicholas P. Skinner
Keyword(s):  
Older Workers ◽  
Full Scale ◽  
Performance Model ◽  
Work Zone ◽  
Visual Performance ◽  
Light Levels ◽  
Lighting Systems ◽  
Control Light ◽  
Computational Analyses

In part because of the potential for high levels of glare from work zone illumination, recommendations for light levels from work zone illumination systems are substantially higher than for levels used along roadways in non–work zone locations. In a two-part study, requirements for work zone illumination light levels were assessed. First, levels for workers varying in age from 20 to 60 years were evaluated with the relative visual performance model, with and without the presence of visibility-reducing glare. Except for the smallest, lowest-contrast tasks performed by the older workers, an illuminance of 10 lx resulted in visibility well above the threshold even in the presence of glare, and an illuminance of 30 lx resulted in suprathreshold visibility for these conditions as well. The results of these computational analyses were largely confirmed in a full-scale, outdoor field demonstration attended by transportation agency engineers and highway contractors. Together, the findings suggest that when lighting systems provide sufficient glare control, light levels do not always need to be especially high to ensure adequate visibility for workers.

The Sky Is Not the Limit: A Visual Performance Model for Cyber-Physical Co-Design in Autonomous Machines

2020 ◽  
Vol 19 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Srivatsan Krishnan ◽  
Zishen Wan ◽  
Kshitij Bhardwaj ◽  
Paul Whatmough ◽  
Aleksandra Faust ◽  
...  
Keyword(s):  
Performance Model ◽  
Visual Performance ◽  
Autonomous Machines

Effect of driving speed on target visibility under mesopic conditions using a driving simulator

2020 ◽  
pp. 147715352093413
Author(s):  
D Cao ◽  
Y Tu ◽  
Z Wang ◽  
L Wang ◽  
L Liu ◽  
...  
Keyword(s):  
Detection Rate ◽  
Driving Simulator ◽  
Performance Model ◽  
Visual Performance ◽  
Boundary Values ◽  
Detection Distance ◽  
Driving Speed ◽  
Level Model ◽  
Target Visibility ◽  
Initial Target

This article concerns driving after dark. Control of driving speed, being one aspect of the cognitive load of driving, is an important factor which influences visual performance when driving. However, it is not included as a parameter in the widely used models, such as small target visibility and relative visual performance. A driving simulation platform was established to enable investigation of the effect of driving speed on target detection performance. In addition, the effects of target contrast, position and the initial target appearance distance were also evaluated. The results show that increasing driving speed leads to a significant reduction in both the detection rate and the detection distance. The effect of speed was characterised using the Visibility Level model, by calculating two boundary values of Visibility Level for different speeds. The results show that driving speed has an impact on target visibility. A new model is proposed, the Simulator-based Visual Performance model, the metric for which is the product of detection rate and detection distance. It describes the effect on visual performance of driving speed, target contrast, distance and their interactions. The Simulator-based Visual Performance model predicts the experimental results well.

scholarly journals Application of a Relative Visual Performance Model in a Virtual Reality Immersive System

2020 ◽  
Vol 26 (10) ◽  
pp. 3128-3132
Author(s):  
Benoit Perroud ◽  
Stephane Regnier ◽  
Andras Kemeny ◽  
Frederic Merienne
Keyword(s):  
Virtual Reality ◽  
Performance Model ◽  
Visual Performance ◽  
Immersive System
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