夜景照明亮度比例视觉适宜性评价仿真研究

Simulation Study on Visual Suitability Evaluation of Night Lighting Brightness Ratio

夜景照明设备的整体亮度跨度较小,且存在很多限高区域,导致环境中整体亮度较差,为了提高夜景照明亮度与人眼视觉的适宜性,提出了夜景照明亮度比例视觉适宜性评价方法。通过夜景照明观测建模数据的标准化处理,采集夜景照明的亮度信息,利用二维数据矩阵分解所得信息,确定夜景照明的环境因素,利用亮度监测模型,计算亮度数据的统计量,完成夜景照明亮度的监测。根据视觉感知的亮度与照明设备亮度之间的关系,计算出光照强度对比度,将驱动电源安装到夜景照明设备中,调节夜景照明亮度比例。将人眼视觉范围划分成多个区域,计算出视觉适宜度判定准则,依据人眼视觉可以承受的亮度与照明亮度的映射关系,定义夜景照明亮度的空间函数,通过夜景照明亮度通道适宜度叠加,实现夜景照明亮度比例视觉适宜性评价。实验结果表明,上述方法适用于夜景照明亮度比例视觉适宜性评价,可以提高评价结果准确性。

In order to improve the suitability of night lighting brightness and human vision,this paper put forward a method of evaluating visual suitability of nightscape lighting brightness ratio.Firstly,the night lighting modeling data was standardized,and then the brightness information of the night lighting was collected.Secondly,the information ob⁃tained from the two-dimensional data matrix decomposition was used to determine the environmental factors.Moreo⁃ver,the brightness monitoring model was used to calculate the statistics of brightness data,thus completing the monito⁃ring of the night brightness.According to the relationship between the brightness of visual perception and the bright⁃ness of lighting equipment,the contrast of light intensity was calculated,and then the driving power was installed in the nightscape lighting equipment for adjusting the brightness ratio of night lighting.Furthermore,the human visual range was divided into multiple areas.Meanwhile,the judgment criteria of visual suitability were determined.Accord⁃ing to the mapping relationship between the acceptable brightness of human visual system and the illumination bright⁃ness,the spatial function of illumination brightness in night scene was defined.Finally,the visual suitability evaluation of illumination brightness ratio in night scene was realized through the superposition of the suitability of illumination brightness channels.The experimental results show that the proposed method is suitable for the visual suitability eval⁃uation of lighting brightness ratio in night scene,and can improve the accuracy of evaluation results.