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Abstract Building detection plays an important role in urban planning, change detection, surface coverage and so on. However, in high resolution remote sensing images, buildings vary in shape, color, and size, which makes building detection a difficult problem. Therefore, this paper proposes a method based on multi-scale and multi-feature to automatically extract buildings in high resolution images: Firstly, down sampling images are used to construct Gauss pyramid model, while fixed size windows in different layers of pyramid image represent different ground areas. Then multi features are calculated which describe building characteristics by sliding windows, and multi features are fused to evaluate the saliency of building in different scales. Then the saliency of superpixels is calculated, and Otsu algorithm is used to automatically determine the threshold, and furthermore, some constraints such as the aspect ratio were combined to extract buildings accurately and automatically. Experiments were made by 0.5 m and 0.2 m high resolution remote sensing images in comparison with the markov random field model based on color and texture modeling algorithm for qualitative and quantitative comparison. The results show that the method suggested in this paper can obtain more satisfactory precision and has higher effect on building detection from high-resolution remote sensing images.
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Keywords
high resolution image
multi-scale
multi-feature
building detection
superpixel
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Corresponding Authors:
Xiangyun HU
E-mail: huxy@whu.edu.cn
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Issue Date: 15 March 2019
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