Authors: Y. Xiao, D. Tien, X.P. Jia
Addresses: School of Engineering and Information Technology, The University of New South Wales, Australian Defence Force Academy, Canberra ACT 2006, Australia. ' School of Computing and Mathematics, Charles Sturt University, Panorama Avenue, Bathurst NSW 2795, Australia. ' School of Engineering and Information Technology, The University of New South Wales, Australian Defence Force Academy, Canberra ACT 2006, Australia
Abstract: A novel region-based perceptual grouping algorithm is proposed for road segment identifying in urban areas from aerial images. Unlike the conventional edge-based approaches, our grouping is regional basis. An imagery scene is modelled by the spectrally homogeneous regions restrained in shape and size. Given a set of low level image features, perceptual grouping is performed on the regions to generate a higher level of structure, from which road segments are extracted. In our unique approach, perceptual grouping is based on the similarity of spectral, orientation and proximity of the candidate regions. The road candidates are further merged into larger regions in terms of their orientation and adjacency. The road segments are extracted from these merged regions on geometric measurement. Experiments were carried out on imagery of real scenes for evaluation. The results showed the approach has the advantage of distinguishing roads from artefacts caused by parking lots and buildings.
Keywords: road extraction; perceptual grouping; tessellation; orientation; region-based grouping; road segment identification; urban areas; aerial images; image features; road segments; road identification; high-resolution images.
International Journal of Intelligent Systems Technologies and Applications, 2010 Vol.9 No.3/4, pp.208 - 217
Published online: 04 Nov 2010 *Full-text access for editors Access for subscribers Purchase this article Comment on this article