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28 January 2009 A method of automatic road extraction based on directional statistical characteristics
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When roads appear as irregular linear targets, most of traditional methods which use local information often give a false alarm of linear feature. In order to overcome this disadvantage, we present an approach to extract main roads in aerial images with oriented filters. Firstly, the leading gradient direction of the local areas is estimated. Then the image is filtered along this direction. We use steerable filters to control the output and get the maximum output response along the road direction. Based on the steps above, we make much improvement in details such as the determination for the size of the sub-block image, the processing of image edge pixels and the processing of orientation angel areas and so on. Experiments on remote sensing images of different environmental settings show that our proposed scheme achieves high accuracy in the road extraction.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Qiwei Hao, Xiaomei Chen, Guoqiang Ni, and Yi Tang "A method of automatic road extraction based on directional statistical characteristics", Proc. SPIE 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, 71563B (28 January 2009);

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