论文部分内容阅读
基于心理学理论研究了指路标志字体与背景亮度比与视力的关系,分析了颜色的色调、饱和度、明度等属性对颜色视认性的影响。通过现场试验对字膜与底膜逆反射系数等级对视认性的影响进行了研究,并建立了逆反射系数与视认距离的关系模型。研究结果表明:字体与背景亮度存在一个最佳比能使视认效果达到最佳,蓝底白字标志的视认性比绿底白字的好;指路标志的最优字膜与底膜配比为字膜逆反射系数为600 cd.lx-1.m-2时,底膜逆反射系数为92.5 cd.lx-1.m-2,此时对应的视认距离为141.9 m;现行的指路标志反光膜等级设置偏高,应当降低等级。
Based on the theory of psychology, the relationship between the brightness ratio of fiducial marks and the background and the visual acuity was studied. The influence of the hue, saturation and lightness on the color visibility was analyzed. The field test was used to study the influence of the retroreflectivity of the memeber and the base film on the visibility, and the relationship between the retroreflectivity and the apparent distance was established. The results show that there is an optimal ratio of fonts and background brightness to the best visual effect, and the blue lettering is better than the green lettering. When the retroreflective coefficient of the film is 600 cd.lx-1.m-2, the retroreflectivity coefficient of the film is 92.5 cd.lx-1.m-2, at this time, the corresponding visual recognition distance is 141.9 m; Road signs reflective film set higher level, should be reduced level.