Extracting Building Height Information based on the Same-name Feature from High-resolution Satellite Image

Based on the idea of the same-name feature，the distance of the same-name straight edge and the main direction parameters of the building are introduced，and the altimetry model of the flat-top straight-edged building is constructed.The feature information extraction technology combining object-oriented and expert knowledge is used to realize the height extraction of the building.Firstly，using the spectral and shape features of the shadow，the detection and localization of the same-name straight edge of the building is carried out from high spatial resolution image.Secondly，based on the detected same-name straight edge vector and the parameter calculation model，the distance of the same-name straight edge parameter is extracted.Finally，based on Building imaging conditions and a new altimetry model to extract building height.The experiment of using the IKONOS and GF-2 image in Beijing area show that the scheme solves the problem that the shadow length of the conventional method is not easy to measure，and the precision is high，reaching the level of the meter，with good human-computer interaction and strong practicality in business operation.