基于双张影像的城市建筑物高度提取方法

针对现有城市建筑物高度提取方法存在的问题，提出一种基于双张影像的城市建筑物高度简易提取方法。利用高分辨率遥感影像和建筑物立面影像，分别提取样本建筑物的阴影长度和高度，采用最小二乘法解算出影像阴影和建筑物高度的相关公式，通过阴影长度反算出建筑物的高度，从而实现大批量建筑物高度数据的获取。通过建模实例和测量对比实验表明，方法具有操作简单、快速的特点，能满足较高的精度要求，具有一定的应用价值。

A method of extracting urban building heights from double images

Because the existing urban building height extraction method is cumbersome and complex, a simple method based on double images is proposed. First, the shadow lengths and heights of the sample buildings are extracted from the high-resolution remote sensing images and building section images; next, the least squares method is used for calculating the relation formula of the image shadow lengths and building heights; then, the shadow lengths are used for calculating the building heights conversely to acquire large quantities of building height data. The modeling and measuring contrast experiments show this method has simple and fast merits, which can meet the high accuracy requirements and have a certain application value.