A technique for 3D building reconstruction

Abstract

An approach to tackle the problem of three-dimensional (3D) building reconstruction in urban imagery is presented. For 3D building reconstruction, there is a need to Combine to (such as grouping) and 3D analysis (such as stereo matching). A "good" strategy for the combination is essential for success. A simple but robust combination strategy is proposed. Combination is carried out only after a 2D building detection technique and a 3D height extraction technique are applied completely independently: The to building detection technique does not use any information generated from the height extraction technique, nor vice versa. Moreover, any assumptions or conditions derived in the course of zn building detection or height extraction are not used for combination. 3D building reconstruction is done by interpolating heights into the area covered by zn building boundaries using the 3D height information. In this way, results from the 2D building detection technique and 3D height extraction technique can be meaningful by themselves. This also Can make the process of 3D building reconstruction simple and applicable to a wide range of images. This approach is tested with airborne images, and the results show that 3D building reconstruction can be achieved successfully.