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Scientia Silvae Sinicae ›› 2023, Vol. 59 ›› Issue (8): 30-39.doi: 10.11707/j.1001-7488.LYKX20210492

• Research papers • Previous Articles     Next Articles

Effects of Plant Color on Visual Attraction for Chaobai River’s Summer and Autumn Urban Riparian Landscape

Chang Zhang,Wenjing Han,Cheng Wang*   

  1. Research Institute of Forestry, CAF  Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland Administration Urban Forest Research Center of National Forestry and Grassland Administration Beijing 100091
  • Received:2021-07-01 Online:2023-08-25 Published:2023-10-16
  • Contact: Cheng Wang

Abstract:

Objective: Urban riparian is an important ecotone between the city land and aquatic zone, serving a variety of ecological and aesthetic functions, which need to be protected, and its landscape needs to be optimized. This study analyzed the effects of color on urban riparian landscape and identified the key factors to its visual attraction, in order to provide a reference for effectively improving the visual attractiveness of urban riparian vegetation color view. Method: In this study, Chaobai River, the most important river flowing through the Beijing-Tianjin-Hebei metropolitan region, was targeted and its 1 000 m urban artificial riparian segment was selected as the research subject. A total of 46 images of 23 plots were taken by a drone in summer and autumn. The 63 color categories were defined by H (Hue) for (25, 45] (45, 80] (80, 140] (140, 220] (220, 290] (290, 345] (345, 25], normalized V (Value) and S (Saturation) for [0, 0.33], (0.33, 0.67], (0.67, 1]. According to this, 38 744 color patches of 25 color categories were extracted through a self-made program. The color patch characteristics were obtained, and their distances to the visual hotspot resulting from the eye movement experiment with 30 volunteers were used to measure the view attraction. At last, a linear mixed regression model was used to analyze the influence of color characteristics on visual attraction. Result: 1) A total of 25 color types of 4 categories, including 4 types of orange, 4 types of yellow, 8 types of yellow-green, and 9 types of green were found in urban riparian. Among them, the green and yellow-green categories accounted for more than 80% of total area proportions. 2) Visual attraction varied in different values, saturation, or hues. Color patches with high saturation belonging to (0.67, 1] or with medium value belonging to (0.33, 0.67] tend to have higher visual attraction. Meanwhile, there was a significant seasonal difference in the visual attraction of color patches, with autumn having a higher visual attraction than summer. 3) Color brightness and saturation had significant positive effects on visual attraction. Hue significantly impacted visual attraction through the interaction with color patches’ area. Moreover, this interaction varied in diverse hues. The more increase of color patch area, the higher the visual attraction only when the hue was within (80, 140]. Conversely, the visual attraction became lower when the hue range resulted in yellow-green, yellow, and orange categories. Conclusion: The gradient colorful scenery from green to yellow-green is emphasized to gain attention as a more common urban riparian vegetation landscape. Distinguishing between the base background color and foreground color is helpful to understand the visual attraction’ differentiation cross color attributes and season. Based on the influence of the color patch’s attribute and area on visual attraction, possible optimization suggestions through the color patch scale for visual attraction are proposed.

Key words: urban riparian, plant color, visual attraction, interaction

CLC Number: