Refining the potential visual exposure index for the assessment of residential visual privacy: a three-dimensional study. Issue 3 (4th May 2023)

• Record Type: Journal Article
• Authors: Zheng, He; Wu, Bo; Zhang, Jinmu; Yan, Jinbiao; Wei, Heyi
• Is Part Of: Journal of Asian architecture and building engineering. Volume 22:Issue 3(2023)
• Page Start: 1458
• Page End: 1475
• Publication Date: 2023-05-04
• Subjects: Visual privacy -- Improved Potential Visual Exposure Index (I-PVEI) -- visual perception -- distribution patterns -- quantitative model; Structural engineering -- East Asia -- Periodicals; Architectural design -- East Asia -- Periodicals; Architectural design; Structural engineering; Periodicals; Electronic journals; 720.95
• DOI: 10.1080/13467581.2022.2085724
• Languages: English
• ISSNs: 1346-7581

Abstract

ABSTRACT: Residential visual privacy is an important issue in modern society. This paper proposes an improved Potential Visual Exposure Index ( I-PVEI ) to evaluate the privacy risks of visual exposure along building facades in a dense residential environment. Compared with the PVEI indicator, the proposed method introduces the observer's view direction based on visual perception and applies a weighting scheme to construct the I-PVEI . To validate the I-PVEI, a case study with a neighborhood located at the center of Kowloon, Hong Kong, was evaluated. The results demonstrate: (1) Potential observers from building and pedestrian levels had different impacts on the neighborhood, resulting in different I-PVEI distribution patterns on the building facades; (2) Although significant changes of I-PVEI value could be found across building facades, I-PVEI values always presented a uniform change trend on the same façade; (3) The quantitative indicator can perceive subtle privacy risks of openings located at the corner of the building, which was overlooked by the PVEI . The results indicate that the proposed I-PVEI can be an optional indicator for the assessment of residential visual privacy in urban planning and building design. Graphical Abstract: uf0001