Abstract:
With the rapid development of sensors, the aerial photogrammetry brings us higher quality products, the detection and correction of building shadow area is also the key t...Show MoreMetadata
Abstract:
With the rapid development of sensors, the aerial photogrammetry brings us higher quality products, the detection and correction of building shadow area is also the key to improve the quality of aerial image. Therefore, this paper presents a method of building shadow determination based on DBM (digital building model). Firstly, a corner point on the shadow boundary is found by refining the edge from aerial image, and then the obtained coordinate of the corner point is combined with DBM to obtain the zenith angle of sun and the altitude angle of sun. Finally, the geometric relationship in DBM is used to determine the shadow on the roof of house (the roof obtained by orthorectification) and the ground from the ghost image. By using the method to detect the shadow of building, we can effectively avoid the problem: the previous method cannot detect the boundary of the shadow which is projected on the roof, and improving the speed of shadow detection.
Date of Conference: 28 July 2019 - 02 August 2019
Date Added to IEEE Xplore: 14 November 2019
ISBN Information: