Extraction of the Floor Area Ratio in the Central District of Fuzhou Cit y Based on an Improved Shadow Index Model
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摘要: 设计提出了一种时间同步新体制即在GEO卫星上放置高精度氢钟并在GEO卫星间建立高精度星间链路以进行高精度时间维持利用两种方案进行了仿真比较研究 仿真结果表明本文提出的方案切实可行可以显著提升时间同步精度尤其是自主时间同步精度并得出了时间同步精度与星间链路精度和星载钟的精度关系 仿真结果表明星载钟精度对新体制时间同步精度的影响相对于星间链路精度的影响较小.Abstract: This paper presents a new method that combines PCA with HSI to differentiate and extract construction shadows from hi gh resolution remote sensing images and then calculates each block floorarea ratio by using re gression anal ysis.The proposed method reduces the complexit y and instabilit y when extracting floor area ratios using the traditional method.Taking downtown Fuzhou as an example we extracted the construction shadow and floor area ratio by the new methodto compare and validate it against the traditional method.The results show that the shadow index from the new method is more reliable and precise than results obtained from the traditional approach.
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Keywords:
- floor ratio area /
- shadow index /
- shadow detection /
- remote sensing image
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