Technology and Methodology |
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Extraction of residential area from high resolution images based on wavelet texture and primitive merging |
HU Hualong1, XUE Wu1,2,3, QIN Zhiyuan1 |
1. Institute of Geospatial Information, Information Engineering University, Zhengzhou 450001, China;
2. State Key Laboratory of Geo-information Engineering, Xi'an 710054, China;
3. Key Laboratory of Mine Spatial Information Technologies of NASG, Henan Polytechnic University, Jiaozuo 454003, China |
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Abstract Due to the highly detailed information and noise in the high resolution panchromatic images, the results of traditional residential area extraction algorithms based on texture features are not satisfactory. To tackle this problem, the authors propose a method based on wavelet texture and primitive merging in this paper. For obtaining the initial primitives, the image was firstly segmented by fractal net evolution approach modified by the wavelet transform, and then the multi-scale wavelet texture features extraction method was directly applied to the irregular image primitives. Based on the artificially provided seed primitives, the algorithm merged the primitives with similar texture features and then applied morphological methods to the result of primitive merging. In the experiment, Mapping Satellite-1(TH-1) panchromatic images were used to validate the proposed method. The comparative analysis with other texture features-based methods shows that the proposed method could extract the street-block residential area from high resolution panchromatic images with a higher extraction accuracy and computational efficiency.
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Keywords
flood inundation area
spatial-temporal simulation
level set
remote sensing
Heilong River flood
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Issue Date: 23 January 2017
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