期刊
PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING
卷 75, 期 4, 页码 437-442出版社
AMER SOC PHOTOGRAMMETRY
DOI: 10.14358/PERS.75.4.437
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资金
- National Science Foundation [BCS-0822489, DEB-0810933]
- National Key Basic Research and Development Program, China [2006CB701304]
- Direct For Biological Sciences
- Division Of Environmental Biology [0810933] Funding Source: National Science Foundation
- Division Of Behavioral and Cognitive Sci
- Direct For Social, Behav & Economic Scie [0822489] Funding Source: National Science Foundation
The advent of Light Detection and Ranging (lidar) technique Provides a promising resource for three-dimensional building detection. Due to the difficulty of removing vegetation, most building detection methods fuse lidar data with multi-spectral images for vegetation indices and relatively few approaches use only lidar data. However, the fusing process may cause errors, introduced by resolution and time difference, shadow and high-rise building displacement problems, and the geo-referencing process. This research presents a morphological building detecting method to identify buildings by gradually removing non-building pixels. First, a ground-filtering algorithm separates ground pixels with buildings, trees, and other objects. Then, an analytical approach removes the remaining non-building pixels using size, shape, height, building element structure, and the height difference between the first and last returns. The experimental results show that this method provides a comparative performance with an overall accuracy of 95.46 percent as in a study site in Austin urban area.
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