Specific search terms for risk factors included alcohol, wine, spirit, beer, seatbelt, helmet, head protective device, sleep, fatigue, apnoea, conspicuity, visibility, illumination, visual, headlights, light, colour, contrast.
The Dutch psychologist Alexander Wertheim suggested in 1989 the term conspicuity to denote visibility of an object taking context into account.
In 1989 he introduced the term conspicuity to denote visibility of an object taking context into account.
This study examines the effects of high-visibility garment design on daytime pedestrian conspicuity in work zones.
It is not self-evident that a measure of how well an object can be seen at different positions in the periphery of our vision can be applied to its visibility in the scene, but the correlation between conspicuity angle and traditional search times in natural scenes has been shown to be high [7, 8].
Results for the paper and pen method showed low variance among subjects and a clear correlation between the conspicuity index and intuitive judgments of the visibility of the signs against different backgrounds.
The results from this study show that Wertheims conspicuity index method is useful in determining the visibility of signs in context.
The simple experiment method used in experiment 1 and 2 showed robust results suggesting that the conspicuity index method can be used to measure visibility of signs in their context.
The first result presented is a mine in seawater environment with low visibility, some acquisition noise and compression noise, see Figure 2. We select the best conspicuity map, Figure 3, using the kurtosis criterion (8). Figure 4 shows the histograms for the conspicuity maps and the calculated kurtosis.
The conclusion is that the conspicuity index method is a simple and useful method that renders quantitative measurements of the visibility of targets taken context into account.
In an Australian study, cyclists overestimated their night-time visibility and occasional cyclists were more likely than frequent cyclists to do so., There were also misjudgements on the conspicuity benefits of fluorescent vs. retroreflective materials at night.
