Sentinel-2 multi-spectral images collected over periods of several months were used to estimate vegetation height for Gabon, respectively Switzerland. A deep convolutional network was trained to extract suitable spectral and textural features from reflectance images and to regress per-pixel vegetation height. In Gabon, reference heights for training and validation were derived from airborne LiDAR measurements. In Switzerland, reference heights were taken from an existing canopy height model derived via photogrammetric surface reconstruction. The resulting maps have a mean absolute error (MAE) of 1.7m in Switzerland, respectively 4.3m in Gabon, and correctly reproduce vegetation heights up to >50m. They also show good qualitative agreement with existing vegetation height maps. Our work demonstrates that, given a moderate amount of reference data, dense vegetation height maps with 10m ground sampling distance (GSD) can be derived at country scale from Sentinel-2 imagery.

文章利用收集的静止卫星Sentinel-2多光谱图像，通过基于深度卷积神经网络(CNN)的图像处理，从反射图像中提取适合的光谱和纹理特征，以回归像素高度来估算瑞士和加蓬的植被高度，从而在国家范围内生成10米地面采样距离(GSD)的高分辨率植被高度地图。

使用Sentinel-2卫星进行全国范围高分辨率植被高度制图