People prefer staying in neighborhoods with abundant green space, but crowded urban buildings insulate residents from experiencing nature. As people spend most of time indoors, it is necessary to measure the amount of perceived greenery from residents’ perspective. Therefore, measuring people-perceiving-greenery at floor-level is very important not only for the developing of urban landscape ecology but also for urban greenery planning, living environment evaluation and eco-city construction. Exposure Opportunity Index (EOI) based on hierarchy urban landscape was developed to measure people-perceiving-greenery at different floors. It considered spatial relations between building floors and nearby greenery. Two main steps were involved: first, the hierarchy urban landscape model was developed including extracting the urban structural information such as Canopy Height Model (CHM) and building structure, and conducting the spatial stratification strategy. Second, EOI was calculated with Inverse Distance Weighting (IDW) method. Over 200 building storeys’ EOI were calculated and validated with 340 photos. Results indicated that EOI fit well with the reference data extracted from the photo series, and it was effective and reliable in measuring people-perceiving-greenery at floor-level. Furthermore, EOI may play important role in urban green planning and residential amenity evaluation.

中文翻译：

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接触机会指数：有效地测量底层的人的感知-绿化

人们更喜欢住在绿地丰富的社区，但是拥挤的城市建筑使居民无法体验大自然。由于人们大部分时间都在室内度过，因此有必要从居民的角度测量可感知的绿化量。因此，在楼层上测量人的感知绿化不仅对于发展城市景观生态非常重要，对于城市绿化规划，生活环境评估和生态城市建设也非常重要。开发了基于分层城市景观的曝光机会指数（EOI），以测量不同楼层的人们感知绿化。它考虑了建筑物地板和附近绿化之间的空间关系。涉及两个主要步骤：第一，建立了分层的城市景观模型，包括提取冠层高度模型（CHM）和建筑结构等城市结构信息，并进行空间分层策略。其次，使用反距离权重（IDW）方法计算EOI。通过340张照片计算并验证了200多个建筑物楼层的EOI。结果表明，EOI与从照片系列中提取的参考数据非常吻合，并且在楼层水平上有效地，可靠地测量了人们的感知绿化。此外，意向书（EOI）可能在城市绿色规划和居住环境评价中发挥重要作用。通过340张照片计算并验证了200多个建筑物楼层的EOI。结果表明，EOI与从照片系列中提取的参考数据非常吻合，并且在地板水平上有效地，可靠地测量了人们的感知绿化。此外，意向书（EOI）可能在城市绿色规划和居住环境评价中发挥重要作用。通过340张照片计算并验证了200多个建筑物楼层的EOI。结果表明，EOI与从照片系列中提取的参考数据非常吻合，并且在地板水平上有效地，可靠地测量了人们的感知绿化。此外，意向书（EOI）可能在城市绿色规划和居住环境评价中发挥重要作用。