城市夜景照明的色彩调和与视觉熵的相关性研究

Research on the Correlation between Color Harmony and Visual Entropy of Urban Nightscape Lighting

城市照明是现代城市文明的象征,在保障城市安全、塑造城市形象、改善城市人居环境等方面发挥重要作用。景观照明作为城市照明的重要组成部分,其量化评估一直受到研究者的关注。本文基于人眼视觉色彩感知特性,将色彩调和与视觉熵概念引入城市夜景观的色彩审美评价中。采用Meanshift算法和CIE 1976色差公式对采集到的上海18处夜景高光谱数据进行分析,利用双色调和模型与视觉熵模型对城市夜景观光色调和度与丰富度定量评估,并进行相关性分析。结果表明,照明场景的色彩调和度与场景平均亮度、饱和度负相关,但不显著。场景丰富度与平均亮度、饱和度具有显著正相关性,且平均亮度、饱和度对丰富度的影响较大,色调角的影响较小。提升夜景观的调和度可以选择色相互补或相似、饱和度相似、明度相似的颜色组合。提升照明场景的亮度和饱和度可提高丰富度,同样,降低亮度和饱和度可减小对人视觉的影响,为城市夜景观照明设计和光干扰防治提供参考。

As a symbol of modern urban civilization,urban lighting plays an important role in ensuring urban safety,shaping urban image and improving urban living environment.As an important part of urban lighting,the quantitative evaluation of landscape lighting has been a subject of research interest.Based on the characteristics of human visual color perception,this paper introduces the concepts of color harmony and visual entropy into the color aesthetic evaluation of urban night landscape.Meanshift algorithm and CIE1976 color difference formula were used to analyze the collected hyperspectral data of 18 night scenes in Shanghai.The dual-tone and visual entropy model were used to quantitatively evaluate the color harmony and richness of urban night scenes.Correlation analysis was conducted to examine the relationship between them.The results show that the color harmony of the lighting scene is negatively related to the average brightness and saturation of the scene,but not significant.The scene richness has a significant positive correlation with the average brightness and saturation,and the average brightness and saturation have a greater impact on the richness,while the hue angle has a smaller impact.To enhance the color harmony of night landscape,color combinations that are complementary or similar in hue,similar in saturation and similar in lightness can be selected.Increasing the brightness and saturation of the lighting scene can enhance the richness of the landscape.Similarly,reducing the brightness and saturation can reduce the impact on human vision.These findings provide insights for the design of urban night landscape lighting and the prevention and control of light pollution.