摘要
色彩作为第一视觉要义,在森林景观质量提升、彰显地域特色等方面发挥着重要作用,但目前研究多集中于色彩变化剧烈的地区,对于珠三角等以渐变性森林色彩景观为主地区的研究较少.为明确渐变性森林色彩构成特征及其变化规律,以珠三角地区林冠色彩景观为研究对象,于 7 个森林公园选取 74 个样区,利用无人机进行全年定期监测,共获取 1 378 张图像;采用K-Means聚类法提取图像色彩信息,耦合人眼敏感度,构建珠三角森林公园色谱,并以此为依据,从色彩构成和空间分布格局两方面量化珠三角森林色彩特征.结果表明:1)珠三角森林色彩划分为橙、黄、黄绿、浅绿、绿、深绿、蓝绿、蓝、紫、红10 个色相,90 种颜色;2)色彩构成方面,整体上以绿色(面积占比 63.34%)为主色,浅绿色(面积占比 14.01%)和黄绿色(面积占比 10.16%)为辅助色,橙色(面积占比 6.22%)和黄色(面积占比6.28%)为点缀色,且以低饱和度(面积占比 68.48%)和中等明度(面积占比 54.00%)为主;3)色彩景观格局方面,橙色和黄色之间、黄绿色和浅绿色之间的斑块指数月变化趋势一致,整体上 1、2 和 5 月森林色彩破碎化程度较高,11 月斑块形状最复杂.总之,珠三角森林色彩变化集中于橙、黄、黄绿、浅绿、绿 5 种色相,并在色彩构成、面积占比及空间分布上呈现渐变性特征,该结果为绿美广东、美丽粤港澳大湾区建设,营造"多层次、多树种、多色彩"的珠三角森林景观提供了技术支撑.
Abstract
Color,as the primary visual element,plays a crucial role in enhancing forest landscape quality and highlighting regional characteristics.However,most current research focuses on the areas with dramatic color changes,and there are few studies on the regions like the Pearl River Delta,which are characterized by gradual color transitions in forest landscapes.To clarify composition and variation patterns of forest colors under the gradual transition,this study focuses on the color landscape of forests canopy in the Pearl River Delta.Seventy-four plots are selected across seven forest parks,and a total of 1 378 images are captured using drones for regular monitoring throughout the year.The K-Means clustering method is employed to extract color information from the images,coupled with human eye sensitivity,to construct the color palette of forest parks in the region,based on which the forest color characteristics in the region are quantified in terms of color composition and spatial distribution pattern.The results show that:1)The forest colors in the Pearl River Delta can be divided into ten hues of orange,yellow,yellow-green,light green,green,dark green,blue-green,blue,purple,and red,and 90 different colors;2)In terms of color composition,the dominant color is green(63.34% of the area),with light green(14.01% )and yellow-green(10.16% )as auxiliary colors,and orange(6.22% )and yellow(6.28% )as accent colors.The colors are predominated by low saturation(68.48% )and medium brightness(54.00% );and 3)In terms of color landscape pattern,the patch index of orange and yellow as well as of yellow-green and light-green show similar trends in monthly change.The fragmentation of forest colors is higher in January,February,and May,and the patch shapes are most complex in November.In conclusion,the forest color variations in the Pearl River Delta are primarily concentrated in five hues:orange,yellow,yellow-green,light green,and green,which exhibit gradient characteristics in terms of color composition,area proportion,and spatial distribution.The results provide technical support for the creation of a"multi-layered,multi-species and multi-color"forest landscape in the Pearl River Delta and make contributions to the building of the Green Beautiful Guangdong and the Beautiful Guangdong-Hong Kong-Macao Greater Bay Area.
基金项目
中央级公益性科研院所基本科研业务费专项(CAFYBB2020ZB008)
国家重点研发计划项目(2021YFE0193200)
东莞市社会发展科技项目(20231800936142)
维普
万方数据