A simple and fast framework of computing relative height in 3D reconstruction

In this paper we propose a new simple and fast approach to gain the objects´, especially buildings´, relative height in 3D reconstruction process. It contains a device used as a platform to let camera to be located on and a fast algorithm which computes the relative heights. The whole method is based on principle of perspective view and performs simple and fast. It needs no expensive and complex devices such as sonar, radar, laser and so on. In 3D reconstruction based on images or video, our method has a wide spread space to use and can reduce cost greatly in such a task.