Abstract
Two new methods for fusion of high-resolution optical and radar satellite images have been proposed to extract roads in high quality in this paper. Two fusion methods, including neural network and knowledge-based fusion are introduced. The first proposed method consists of two stages: (i) separate road detection using each dataset and (ii) fusion of the results obtained using a neural network. In this method, the neural networks are separately applied on high-resolution IKONOS and TerraSAR-X images for road detection, using a variety of texture parameters. The outputs of two neural networks, as well as the spectral features of optical image, are used in a third neural network as inputs. The second method is a knowledge-based fusion using thresholds of narrow roads and vegetation gray levels. First roads are extracted from each source separately. The outputs are then compared and advantages and disadvantages of each data source are investigated . The results obtained from accuracy assessment show the efficiency of the proposed methods. Furthermore, the comparison of the results showed the superiority of the first algorithm.
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Khesali, E., Zoej, M.J.V., Mokhtarzade, M. et al. Semi Automatic Road Extraction by Fusion of High Resolution Optical and Radar Images. J Indian Soc Remote Sens 44, 21–29 (2016). https://doi.org/10.1007/s12524-015-0480-2
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DOI: https://doi.org/10.1007/s12524-015-0480-2