期刊
APPLIED INTELLIGENCE
卷 45, 期 2, 页码 443-457出版社
SPRINGER
DOI: 10.1007/s10489-016-0762-6
关键词
Building detection; Machine learning; Geospatial reflective imagery; Discrete object detection
资金
- National Nuclear Security Agency of the U.S. Department of Energy [DE-NA0001123]
- National Science Foundation Graduate Research Fellowship Program [DGE-1356104]
- National Science Foundation
- U.S. Department of Energy's Office of Science
This work describes algorithms for performing discrete object detection, specifically in the case of buildings, where usually only low quality RGB-only geospatial reflective imagery is available. We utilize new candidate search and feature extraction techniques to reduce the problem to a machine learning (ML) classification task. Here we can harness the complex patterns of contrast features contained in training data to establish a model of buildings. We avoid costly sliding windows to generate candidates; instead we innovatively stitch together well known image processing techniques to produce candidates for building detection that cover 80-85 % of buildings. Reducing the number of possible candidates is important due to the scale of the problem. Each candidate is subjected to classification which, although linear, costs time and prohibits large scale evaluation. We propose a candidate alignment algorithm to boost classification performance to 80-90 % precision with a linear time algorithm and show it has negligible cost. Also, we propose a new concept called a Permutable Haar Mesh (PHM) which we use to form and traverse a search space to recover candidate buildings which were lost in the initial preprocessing phase. All code and datasets from this paper are made available online http://kdl.cs.umb.edu/w/datasets/ and https://github.com/caitlinkuhlman/ObjectDetectionCLUtility).
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