Trend of action on the display effect based on Pepper’s ghost images affected by illumination and color temperature from led light sources
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摘要:
随着数字化展示技术的不断发展，展陈方式也发生了改变。佩伯尔幻象的展陈空间的光环境在保证效果的同时，还具有较好的视觉舒适性。为探寻光环境对佩伯尔幻象展示效果的影响，搭建了虚拟成像展示空间，研究了影响成像效果的因素与趋势。研究设定12组不同照度和色温组合的LED光照参数，选取25名观察者进行心理物理学实验，以分析不同光环境对佩伯尔幻象展陈效果的影响。通过实验可知：色温对幻象中的色彩真实度、细节表现力、立体感表现力评价影响较低；照度对色彩真实度评价未产生显著影响，对它的细节表现力、立体感表现力具有显著性影响，在色温为3500 K，照度为10 lx的光环境下，展示效果中的细节表现力、立体感表现力相对较高，在色温为2500 K、照度为10 lx时视觉舒适度较好。
Abstract:With the continuous development of digital display technology, display methods have also changed. Pepper’s ghost images that adopt modern display methods require the light environment of the exhibition space not only to ensure the effect but also ensure better visual comfort. In order to explore the influence of the lighting environment on the display effect based on Pepper’s ghost images, a virtual imaging display space is set up to analyze the factors and trends affecting the imaging effect, in which 12 sets of LED lighting conditions with different illuminances and color temperatures are generated. 25 observers are selected to conduct a psychophysical experiment. The experiment shows that color temperature has no significant effect on the evaluation of color authenticity, detail expressiveness and stereoscopic expressiveness for Pepper’s ghost images; illumination has no strong effect on the evaluation of the color authenticity of Pepper’s ghost images, but has a significant effect on their detail expressiveness and stereoscopic expressiveness. Under the lighting environment where the color temperature is 3500 K and the illumination is 10 lx, the detailed expressiveness and stereoscopic expressiveness of the display effect are relatively high and the visual comfort of 2500 K and 10 lx is better.
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Key words:
- Pepper’s ghost images /
- illuminance /
- color temperature /
- psychophysical experiment
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图 3 不同照度与色温作用下视觉舒适度估算边际平均值
Figure 3. Marginal mean of visual comfort estimation under different illuminations and color temperatures
图 4 25名观测者在不同色温照度下的视觉舒适度评价均值
Figure 4. The average value of visual comfort evaluation by 25 observers under different color temperatures and illuminations
图 5 25名观测者在不同色温、照度下的细节表现力评价均值
Figure 5. The average value of detail expressiveness evaluation by 25 observers under different color temperatures and illuminances
图 6 25名观测者在不同色温、照度下的立体感表现力评价均值
Figure 6. The average value of the stereoscopic expressiveness evaluation by 25 observers under different color temperatures and illuminances
表 1 实验用投影仪BenQMW529相关参数
Table 1. Related parameters of BenQMW529 used as experimental projector
型号 显示技术 亮度 lm 标准分辨率 最高分辨率 BenQMW529 DLP 3300 pixel 1280 pixel×
800 pixel1920 pixel×
1200 pixel
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表 2 实验量表
Table 2. Experimental scale
实验项 感性意象 评分 感性意象 色彩真实度 虚幻 1 2 3 4 5 6 7 真实 细节表现力 粗略 1 2 3 4 5 6 7 细节 立体表现力 平面 1 2 3 4 5 6 7 立体 视觉舒适度 疲劳 1 2 3 4 5 6 7 舒适
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表 3 双因素方差分析结果
Table 3. Double factor variance analysis results
条件 显著性p 色彩真实度 细节表现力 立体感表现力 视觉舒适度 照度×色温 0.978 0.425 0.430 0.000
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表 4 方差齐性检验
Table 4. Test of homogeneity of variance
评价项目 显著性p 色彩真实度 0.164 细节表现力 0.073 立体感表现力 0.368 视觉舒适度 0.145
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表 5 单因素方差分析
Table 5. One-way analysis of variance
条件 显著性p 色彩真实度 细节表现力 立体感表现力 视觉舒适度 色温 0.547 0.354 0.797 0.647 照度 0.264 0.047 0.021 0.039
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